| 单词 | sediment |
| 例句 | I test the particulate and the sediment is nothing more than sand, making it completely drinkable with the filtration straws. The Last Cuentista 2021-10-12T00:00:00Z Because Dillehay’s team had failed to identify properly the location of the stone tools in Monte Verde, Fiedel said, their antiquity was up to question; they could have been in a recent sediment layer. 1491 2005-10-10T00:00:00Z In the next quarter century amateur bone hunters discovered dozens of what they believed to be ancient skeletons in what they believed to be ancient sediments. 1491 2005-10-10T00:00:00Z I watch them sink to the bottom of the glass, shining sediment. The Cruel Prince 2018-01-02T00:00:00Z The primary diver descends through the dark and cold until he hits bottom, stirring up a thick cloud of silt and sediment. The Line Tender 2019-04-16T00:00:00Z It came in a carton that you shake before you drink to mix the citrusy sediment that settles on the bottom. I Will Always Write Back 2016-05-03T00:00:00Z The dark line of the horizon is far in the distance, the sky above it lighter, like layers of sediment in rock. Orphan Train 2013-04-02T00:00:00Z He held a beaker of muddy brown liquid up to the warm, wavering light and put on his spectacles to peer at the thick sediment that settled to the bottom like river sludge. The Evolution of Calpurnia Tate 2009-05-12T00:00:00Z Jack says, “Those are sediments, bud. Just dirt and sand. All natural.” The Sea in Winter 2021-01-05T00:00:00Z Roosevelt’s team slowly scraped away sediment, traveling backward in time with every inch. 1491 2005-10-10T00:00:00Z Dad told me about all his plans and showed me his pages of graphs and calculations and geological charts, depicting the layers of sediment where the gold was buried. The Glass Castle 2005-03-01T00:00:00Z The magnets kept shorting out for reasons the engineers were able to diagnose only after opening one up, when they discovered its cooling oil had been thoroughly contaminated by rust, metal shavings, and sediment. Big Science 2015-07-07T00:00:00Z The air in the evening lamplight is coagulated, like a custard thickening; heavier sediments of light collect in the corners of the living room. Cat's Eye 1988-09-01T00:00:00Z After five months the water recedes, leaving behind a layer of rich sediment. 1491 2005-10-10T00:00:00Z But this is the truth: When I leaned over to peer into the river, the water was not brown and full of sediment, but perfectly clear. Red Kayak 2004-09-23T00:00:00Z Most of the salt occurred in the sediments on the swamp bottoms. 1491 2005-10-10T00:00:00Z The island, low and often swampy, is created by the collision of the Amazon with the sea, which forces the river to disgorge dissolved sediments. 1491 2005-10-10T00:00:00Z To make the water potable, the Maya laid a layer of crushed limestone atop the sediments, effectively paving over the salt. 1491 2005-10-10T00:00:00Z “In what attitude wras it found? What layer of the sediment?” The Astonishing Life of Octavian Nothing, Traitor to the Nation, Volume I: The Pox Party 2006-09-12T00:00:00Z Choices, numberless as grains of sand, had layered and compressed, coalescing into sediment, then into rock, until all was set in stone. Educated 2018-02-20T00:00:00Z The concrete is mottled salt-and-pepper, stained from the sediment of old storm surges, but Santiago Creek hasn’t had running water for a few years now. Dry 2018-10-02T00:00:00Z And the sediments around them were too disturbed to ascertain their age. 1491 2005-10-10T00:00:00Z That was the question of where all the sediments went. A Short History of Nearly Everything 2003-05-06T00:00:00Z We took handfuls of sediment from homemade African beer, which has a strong scent much favored by pigs, and placed it upwind of the pig. Long Walk to Freedom 1994-01-01T00:00:00Z If the ocean floors were ancient, as everyone assumed, they should be thickly blanketed with sediments, like the mud on the bottom of a river or lake. A Short History of Nearly Everything 2003-05-06T00:00:00Z The pig was so aroused by the scent that he came out of the kraal, following a trail we had laid, gradually made his way to us, wheezing and snorting and eating the sediment. Long Walk to Freedom 1994-01-01T00:00:00Z A single bit of sediment coiling in the jar on some slow hydraulic axis. The Road 2006-09-28T00:00:00Z In 2001 researchers at the California Institute of Technology analyzed helium isotopes from sediments left from the later KT impact and concluded that it affected Earth’s climate for about ten thousand years. A Short History of Nearly Everything 2003-05-06T00:00:00Z Despite constant maintenance, erosion silted up reservoirs, hurricanes destroyed terraces, and weeds and sediment choked irrigation networks. 1491 2005-10-10T00:00:00Z “No real sediment to speak of,” he said. The Evolution of Calpurnia Tate 2009-05-12T00:00:00Z The water, opaque with glacial sediment and only a few degrees warmer than the ice it had so recently been, was the color of wet concrete. Into the Wild 1996-01-01T00:00:00Z Tree-ear was rubbing the sediment between his fingers, as he always did. A Single Shard 2001-04-23T00:00:00Z She blew on the sediment and began turning it over with the handle of the spoon, prodding it to let the heat out Later, she was able to sort it with her fingers. The Once and Future King 1958-01-01T00:00:00Z “Messy. They are tangled as a jungle of vines, layered like the sediment in a canyon. We must weave through the vines, trace the sediment. We must translate and decipher.” An Ember in the Ashes 2015-04-28T00:00:00Z Grains of sand, incalculable, pressing into sediment, then rock. Educated 2018-02-20T00:00:00Z Since then, though, scientific measurements, mainly of pollen in lake sediments, have shown that the Maya did cut down much of the region’s forest, using the wood for fuel and the land for agriculture. 1491 2005-10-10T00:00:00Z “Careful, we don’t want to disturb any sediment. Let’s see how it looks first.” The Evolution of Calpurnia Tate 2009-05-12T00:00:00Z A ring of chocolate sediment circled the bottom. Fablehaven 2006-07-30T00:00:00Z Such symbolic offerings will have to count for more as popular concerns grow about sediment building up behind the Three Gorges dam, increasing water extraction and desertification in the Yellow river basin. Water, water, everywhere 2016-09-08T04:00:00Z Now at 160 pounds on her 5-foot frame, she is diabetic and in kidney failure, her mouth thick with thirst and her urine thick with sediment. A Reckoning With an Imperfect Science in ‘Blue Dreams’ 2018-04-03T04:00:00Z "Buried in that sediment are very likely forensic remains of that person." Federal officials: Photos support case that human remains are in mud at Titanic shipwreck site 2012-04-15T05:48:00Z Britain's icy desolation ended abruptly 14,700 years ago when there was a dramatic leap in temperatures across the globe according to ice-cores found in Greenland and lake sediments in Germany. Bones from a Cheddar Gorge cave show that cannibalism helped Britain's earliest settlers survive the ice age 2010-06-19T23:05:00Z Removing the dams will dump millions of cubic yards of sediment downstream and destroy reservoirs that have been used for recreation while breeding toxic algae. 'We're the bad guy': inside the shocking new film about wild fish 2019-05-08T04:00:00Z Wetlands also act as our planet's kidneys, sponging up excess rainwater to prevent flooding, and filtering out some sediment and contaminants before they can reach springs, creeks, groundwater, ocean. Can more farmers be convinced to conserve and restore wetlands? 2021-03-19T04:00:00Z An “unconformity” is the geological term for “a discontinuity in the deposition of sediment,” in Raffles’s words. Grief and Geology Both Take Time in ‘The Book of Unconformities’ 2020-09-22T04:00:00Z The layered glazes and "stacked beads of paint" in Elise Richman's more abstract "Horizon I" create a variegated sheen of sediments ranging from blue to purple to lilac. Review: From micro-detail to grand overview, from figurative to abstract, group show discloses local arts talent 2010-06-25T21:32:00Z These entries are less shots of espresso than big, roomy cups of coffee that throw some interesting sediment. Books of The Times: Isherwood?s Singular Second Wind 2010-12-01T16:58:00Z But properly conserved, a building retains evidence of the passage of time, layered like sediments of the earth. The Pain and Sweat of Merce Cunningham Dancers, Captured in Latex 2019-04-29T04:00:00Z Turns out that a more efficient method for removing plaster, sediment and grime from dinosaur bones is to use power tools. A real Jurassic park lies underground at the Wyoming Dinosaur Center 2016-11-17T05:00:00Z Or take new efforts to mine the sea floor for valuable minerals, or to stir sediment and fertilize oceanic food chains. How will the world end? 2012-06-17T19:00:00Z Perhaps for them the potential greatness of Muenchberg was evident in its complexity: diverse exposures angled in all directions and wide-ranging soils including red sandstone with lots of iron and quartz, volcanic sediment and limestone. Alsatian Wines Strike a Balance of Dry and Sweet 2017-08-17T04:00:00Z The sea eventually dried up, some 90 percent of all life mysteriously went extinct at the end of the Permian era and the horseshoe-shaped reef was buried for eons beneath mineral salts and sediments. There Are No Real Roads in Guadalupe Park. You Earn the Incredible Views. 2018-07-16T04:00:00Z The 2012 riesling is a bit cloudy and will leave some sediment at the bottom of the glass, but it’s an earthy, gravelly delight, gentle and balanced. 20 Wines for Under $20 2015-01-15T05:00:00Z At Sparrow Pond, summer rains caused more sediment to flow in, while the baffle prevented water from rising. With beavers in the suburbs, park officials look to balance needs of humans and ‘nature’s engineers’ 2021-10-04T04:00:00Z Tip: Leave the fins in your rental car because they will just stir up sediment and cloud the water. Slowing Down, Finding Hidden Paradise on St. John 2017-03-28T04:00:00Z But there’s a lot of extraneous sediment floating around, muddying its impact. Isabel Allende’s ‘Ripper’: tracking a San Francisco killer 2014-01-22T22:37:43Z Her intimate and seemingly quotidian scenes of domestic life in Nigeria and the U.S. are bold and colorful, literally layered with narratives that are personal and political, “like the layering of sediment,” she says. Njideka Akunyili Crosby: The painter in her MacArthur moment 2017-11-02T04:00:00Z In May 2009, after decades of litigation and environmental activism led by Mr. Seeger’s nonprofit environmental organization, Hudson River Sloop Clearwater, General Electric began dredging sediment containing PCBs it had dumped into the Hudson. Pete Seeger, Songwriter and Champion of Folk Music, Dies at 94 2014-01-28T06:32:10Z Green shows how you can love a place’s stink, find it splendid even as you despise its sediment. In ‘The Kingdoms of Savannah,’ Oddballs Circle Around a Murder Mystery 2022-07-20T04:00:00Z Green and opaque — a temporary consequence of sediment and leaves that had found their way into the milling process — it looked like pond water. Travel: Olive oil in Paciano, Italy Marina Warner described folk tales, in Calvino's hands, as being "the sediment of people's experiences, transformed into a universal language by the fantasy". A week in radio: Ken Dodd and Italo Calvino on Radio 3 2012-06-07T20:30:04Z They say the 28 bodies were thrown into the pit as an act of reverence for the dead and that the stalagmite grew over the sediment containing the bones. Scientists are accused of distorting theory of human evolution by misdating bones 2012-06-09T23:07:18Z Before the Champagne is finished, the sediment left by the dead yeast is expelled, or disgorged, from the bottle. Shopping List for Champagne 2016-12-15T05:00:00Z Visitors will see, through a glass walkway under their feet, artifacts long hidden under the harbor's sediment after earthquakes and tsunamis submerged ancient Alexandria more than 1,500 years ago. Philly hosts world premiere of Cleopatra exhibit 2010-06-04T20:09:00Z In the process, about 3 percent of the wine is lost: some in the discarded sediment, the rest — the “angels’ share” — to evaporation. The vintage stuff is glorious — and pricey. But there are other ways to enjoy port. 2018-11-30T05:00:00Z I call it a chaotic sediment of urbanization. Hugo Crosthwaite on Tijuana, Mexico's missing, the power of comic books 2015-05-29T04:00:00Z The business specialized then in erosion and sediment control, but its name, The Silty Lady, conjured other thoughts in some callers and was eventually changed, Mr. Henry said. For a Black Man Hired to Undo a Confederate Legacy, It Has Not Been Easy 2022-04-17T04:00:00Z But some impacts are being felt now, especially for sediment dwelling seafood. Listen up, doctors: Here’s how to talk to your patients 2012-05-23T11:45:00Z On the one hand, with thousands of shows at the fringe this year the need for something to help pan the gold from the stony sediment is stronger than ever. Edinburgh comedy notebook: What to see (or not to see)? 2011-08-22T13:17:49Z In sparkling wine parlance, disgorging refers to extracting the sediment, or lees, that accumulate as the wine develops. A Quarantine Activity for the Wine Lover 2020-05-05T04:00:00Z The Ravine near 104th Street, with its rushing waterfall, has pools clogged with sediment and needs dredging. Central Park, Bucolic but Aging, Is in a Quest for $300 Million 2016-07-13T04:00:00Z “Maldives/Sandbars” shows diagrams and a short video of M.I.T. researchers’ work in directing ocean waves to build sediment and reduce erosion on islands and coastal areas without needing to build ecologically harmful concrete dams. The End Is Nigh. Can Design Save Us? 2019-03-20T04:00:00Z They generally spend quite a bit of time as they age in contact with the lees, a collective term for the dead yeast cells left over from fermentation, grape fragments and other sediment. Godello, a Case Study in the Character of Wine 2017-08-31T04:00:00Z As the sediment settles, it raises the river bed and makes the river more prone to flooding with the summer rains. Water, water, everywhere 2016-09-08T04:00:00Z Scrape away at any roasted sediment on the tin with a wooden spoon and stir to dissolve into the wine. Nigel Slater’s quick Christmas roast recipe 2015-12-22T05:00:00Z Images from satellites showed the ground here retained its heat even at night, a strong sign that it contained clays and other sediments. Curiosity rover's descent to Mars – the story so far 2013-07-27T23:05:00Z We camped that night at the inlet of a creek whose waters were as white and opaque as full-cream milk, colored by limestone sediment from a massif to the west. Explorer: Far, Maybe Too Far, Into the Yukon 2012-08-23T17:33:18Z But you might want to keep the bottle standing up so the sediment settles. Bubbles, With Joy: Pétillant Naturel’s Triumphant Return 2018-03-08T05:00:00Z In February or March, everyone is invited back for racking: the removal of sediment from the barrels. Fun by the Barrel (Wine, Too) 2010-12-02T22:00:00Z Typically these form in the sediments of lakes. Curiosity rover's descent to Mars – the story so far 2013-07-27T23:05:00Z The tumultuous tide, as the Pacific Ocean forces itself in and out of a gap a mile wide, constantly churns sand and sediment, and visibility is never good. Escape from Alcatraz: a swim from the Rock to the San Francisco shore 2017-01-04T05:00:00Z Winnie’s circling, darting thoughts seemed usually to spring from nowhere rather than from the mind of a woman who knows the sediment of life will only pile higher if she can’t break free of inertia. Review: In Beckett’s ‘Happy Days,’ a Woman Buried Deep by Inertia 2015-06-29T04:00:00Z The Tar Pits still has thousands of tons of sediment boxes from past excavations and limited help, meaning it will take years to comb through everything. A Fossil Museum Uses the Past to Reimagine Climate’s Future 2022-10-20T04:00:00Z "Every ledge of the Eiger is covered in the sediment of history," says the mountaineer Stephen Venables, who is unusually forthcoming for a climber and has a lovely way with words. TV review: Eiger: Wall Of Death and Waterloo Road 2010-09-02T06:00:00Z Divers photographed a section of the seabed cleared of sediment with a powerful suction device. Divers explore sunken ruins of Cleopatra's palace 2010-05-25T21:56:00Z The codes of genres and the assumptions of categories are the packed-in sediment of presumptive critical expertise, the rigid learning that gets in the way of cinematic experience. These So-Called Bad Movies Prove the Urgency of Film Criticism 2015-11-20T05:00:00Z Older red wines, more than a decade past their vintage, are probably throwing some sediment. Perspective | Decanting demystified: When your wine needs to breathe and what to do about it 2019-10-11T04:00:00Z The swirls of sediment made wavy marbled ribbons in the wall, and the clicking of our crampons echoed through the tunnels. Greeting the New Year in Earth’s Northernmost Settlement 2019-12-30T05:00:00Z Most weathering occurs on land while most deposition occurs in the seas, resulting in a net accumulation of marine sediment. Notes & Queries: Is the Earth getting bigger? 2012-05-30T16:00:01Z The analysis was performed by a German research institution, which analyzed the ink and sediment layers of the fragments, said Heather Cirmo, a spokeswoman for the Museum of the Bible, on Tuesday. Museum of Bible Removes Dead Sea Scrolls It Suspects Are Fake 2018-10-23T04:00:00Z His too loud laughter was something he'd acquired, something he'd learned how to do; theirs was intrinsic, the rich sediment of their lives. Fancy dress by Kate Horsley 2010-12-26T00:05:12Z During the journey, she also created temporary paintings on the side of the ship using ocean sediment. Moment of Friday: Hagfish hanky-panky, Lily Simonson's oceanic obsession 2014-09-19T04:00:00Z When the animals died, many were covered with sediment, eventually turning them to stone. Finding fossils, on your own dig (or in a monument or museum) 2016-06-30T04:00:00Z Shaped by millions of years of sediment deposits and erosion, the rocks owe their red hues to a thin coating of iron oxide. In Sedona, Ariz., biking a landscape that embodies the romance of the American West 2019-02-07T05:00:00Z The date was later pushed back, partly because of the discovery of a quicksandlike layer of sediment under the site. African Art Museum Again Delays Opening of Site on Fifth Avenue 2010-09-03T22:38:00Z It involves analyzing data like layers of sediment taken from the seabed. What’s Bad News for Coastlines Can Be Good News for Surfers 2017-12-29T05:00:00Z In Episode 2 it’s a crunchy sediment that is a byproduct of the creation of soy sauce. 2010-01-21T04:45:00Z The expedition collected sediments and rock samples, but was intended as a trial run ahead of a comprehensive scientific mission to explore the trench sometime in the next two years. Dive for Avatar 2011-01-18T07:59:02Z Each spring, as it flow from the Caucasus Mountains to the Black Sea, the Inguri River deposits sediment in such volume that it creates small islands in midstream, which then wash away in the fall. First Build an Island, Then Make a Film 2015-01-08T05:00:00Z Aged in 600-liter vats called pipes, the wine is drawn off, or racked, into large vats once a year so sediment can be removed, then returned to the pipes. The vintage stuff is glorious — and pricey. But there are other ways to enjoy port. 2018-11-30T05:00:00Z It represented the most recent stratum of social and cultural sediment built up over centuries. 'Junk Dada' assembles Noah Purifoy's overlooked, pivotal works 2015-06-08T04:00:00Z Second, to separate some older red wines and some unfiltered white wines from sediment that naturally develops in the bottle. No-Sweat Answers to Some Basic Wine Questions 2021-12-30T05:00:00Z “Sometimes what you’re pouring looks crazy, sediment, bits of grape skin, but most producers prefer you get it all in,” he says. The cult of natural wine – 'this is like punk or acid house' 2017-11-14T05:00:00Z One of the most beautiful places in the area, the petrified dunes are composed of the sediment of an ancient sea. Here’s what to do on a weekend getaway to Zion National Park in Utah 2021-07-24T04:00:00Z “They collide, they collapse, like sediments of history,” Jackson said. Tomashi Jackson Harvests Histories From the Land of Plenty 2021-07-08T04:00:00Z A panoramic view of Madrid looks inviting until you notice the yellow-brown band of smog, as distinct as sediment, on the horizon. Conservation-photo award winners at the Burke: beautiful, brutal, complex 2012-07-13T19:37:03Z On a recent day, a stroll in Kilkenny’s Millennium Forest — planted 20 years ago with native trees — had Moore, contemplating the layers of sediment and history beneath him, musing about a possible “Wolfwalkers” spinoff. How an Irish town became home for an animation powerhouse 2021-04-09T04:00:00Z Shake to combine well, then let the sediments fall. The seven pantry essentials in my Nigerian kitchen 2021-03-09T05:00:00Z Mount Vesuvius erupted, spewing lava onto the city of Pompeii, destroying it, but protecting it by sealing it under layers of sediment. What's on This Week Around the World 1462-08-11T05:00:00Z Across the U.S., waters have become increasingly infiltrated by plastics, sediment, drugs like antibiotics, and agricultural chemicals. Can more farmers be convinced to conserve and restore wetlands? 2021-03-19T04:00:00Z Generally, the wines are aged on their lees, the sediment of dead yeast cells and other particles that remain after fermentation is complete. For Muscadet, Look Beyond the Obvious 2018-10-11T04:00:00Z I thought of it as sediment, as putting down layers. Tell Us 5 Things About Your Book: A Journalist Recalls the Terror (and Boredom) of Being Held Hostage 2018-11-18T05:00:00Z Dams also slow water’s flow while filtering sediment and pollutants that would otherwise flow downstream. With beavers in the suburbs, park officials look to balance needs of humans and ‘nature’s engineers’ 2021-10-04T04:00:00Z Drinking sediment is not harmful, but it’s unpleasant, like having a mouthful of grit. No-Sweat Answers to Some Basic Wine Questions 2021-12-30T05:00:00Z The constant erosion of those soft cliffs, along with the scouring of ancient river sediment, silts up the river and colors it sienna brown. In Nova Scotia, tidal-bore rafting offers a uniquely muddy adventure 2017-01-26T05:00:00Z Sparrow Pond’s 2023 restoration project will improve sediment management, restore proper water depth and improve wildlife habitat without creating problems for the trail. With beavers in the suburbs, park officials look to balance needs of humans and ‘nature’s engineers’ 2021-10-04T04:00:00Z Many of its treasures are completely intact, wrapped in sediment protecting them from the saltwater. Divers explore sunken ruins of Cleopatra's palace 2010-05-25T21:56:00Z Reefs are being smothered when sediment and nutrients like fertilizer wash into the ocean from coastal housing and hotel developments. Hawaii at center of fight over aquarium fish 2014-06-26T04:00:00Z Louisiana is my ancestor and the great mother, the Mississippi River, bore him slowly, out of sediment and over eons. Patter and Patois 2015-08-03T04:00:00Z Additionally, the sediment residue we produced has a high nutrient value and potentially has commercial value as a fertilizer or animal feed, while the liquid culture can be reused for the next batch. New study shows we can create value from food waste by turning it into a highly desirable material 2023-09-27T04:00:00Z In all of this is an assumption that the true value of psychedelics is not the experience of them — the grooviness of the moment — but the sediment the experience leaves behind. A Strait-Laced Writer Explores Psychedelics, and Leaves the Door of Perception Ajar 2018-05-14T04:00:00Z Drills shook the earth as they bore through the limestone sediment; derricks swung their large clawing arms back and forth. The Marked Woman 2017-03-01T05:00:00Z Many people assume decanting is only useful for older red wines, which might accumulate sediment over the course of long aging. A Starter Kit for Aspiring Wine Lovers 2021-04-09T04:00:00Z Dr. Whitehead’s experiments involving exposures to oiled sediments, done in collaboration with colleague Dr. Fernando Galvez, show that killifish embryos are taking longer to develop or don’t hatch at all. Listen up, doctors: Here’s how to talk to your patients 2012-05-23T11:45:00Z To decant, make sure to stand the bottle upright long enough for the sediment to settle to the bottom. No-Sweat Answers to Some Basic Wine Questions 2021-12-30T05:00:00Z According to Cox, routinely plowing and planting on top of a seasonally dry wetland "causes damage that is severe. Over time, the basin fills in with sediment and those wetlands' values and functions are degraded." Can more farmers be convinced to conserve and restore wetlands? 2021-03-19T04:00:00Z Not only are the viewpoints stunning, but it’s easy to hike through winding switchback canyons among vivid layered sediment. Take a road trip to Utah’s Red Rock Country 2018-03-15T04:00:00Z If you don’t have time for that, pour carefully and let any sediment settle in the glass. No-Sweat Answers to Some Basic Wine Questions 2021-12-30T05:00:00Z “But I realized for the first time that the glacier is gliding — really, really slowly — on this water underneath sediments. And the sound has presence, like a creature. I totally fell in love.” The Poignant Music of Melting Ice 2023-03-16T04:00:00Z Loud drumming, especially with the bass drum, he said, helps the sediment in the wine settle to the bottom of the vat, and eliminates any remaining carbon dioxide. Leaving It All Behind for the Love of Nebbiolo 2019-03-07T05:00:00Z In 2006 a “mud volcano” erupted in East Java, Indonesia, engulfing more than 10 villages in slimy sediment. What’s on TV Monday: ‘The Deuce’ and a Monday Night Football Anniversary 2019-09-09T04:00:00Z Much of what we know about ancient atmospheres comes from chemical studies of ancient sea life and sediments, Kipp said. Plants that survived dinosaur extinction pulled nitrogen from air 2023-11-16T05:00:00Z The study focussed on New Zealand, where widespread deforestation and farming was begun by European settlers in the late 19th Century increasing the amount of sediment in rivers. Clearing mangroves makes 'muddification' worse 2023-11-15T05:00:00Z A predecessor had operated an unclean gas plant around a century ago, the company said, and had in the process dumped a material akin to coal tar into the river, trapping artifacts in the sediment. Confederate ammo, other artifacts recovered from South Carolina river 2023-11-14T05:00:00Z However, the DNA present in the sediment also showed that over the last 20 years the lake had begun to recover. 'Biodiversity time machine' provides insights into a century of loss 2023-11-07T05:00:00Z For animals, these included burrowing through sediments and new kinds of predation. Our Evolutionary Past Can Teach Us about AI’s Future 2023-11-07T05:00:00Z "To do this, we compiled and analyzed all of the high-resolution reconstructions from marine sediments of the North Atlantic," says Dr. Lukas Jonkers, co-author of the study and micropaleontologist at MARUM. How a climate model can illustrate and explain ice-age climate variability 2023-11-02T04:00:00Z The study used a "bio-morphodynamic model" -- a computer simulation that takes account of factors including tides, currents, sediment patterns and mangrove growth in New Zealand estuaries. Clearing mangroves makes 'muddification' worse 2023-11-15T05:00:00Z Confirming the age would require drilling through 1.2 miles of ice with a water drill to get a sample of sediment beneath, something that might happen in the future, he says. Lost River Landscape Discovered below East Antarctic Ice 2023-11-03T04:00:00Z To answer these questions, the team worked on a sediment profile from the southern Caribbean and reconstructed the salinity and temperature of the surface water over the last 1700 years. How salt from the Caribbean affects our climate 2023-11-03T04:00:00Z Some researchers extracted cores of sediment from lakes in the region, analyzing oxygen isotopes and pollen grains that traced how temperatures and vegetation had changed over the past 46,000 years. In Peru, a 20-year study charted Amazon forests—and revealed how warming has changed them 2023-11-02T04:00:00Z The research adds to a growing understanding of how mercury, which is used by gold miners to separate the precious metal from sediment, is impacting wildlife in the tropics. Gold mining spreads mercury to tropical birds, study says 2023-11-01T04:00:00Z "By reducing the amount of sediment going into rivers, we can safeguard sandy ecosystems and eliminate the pressure for expensive -- and possibly counter-productive -- management downstream." Clearing mangroves makes 'muddification' worse 2023-11-15T05:00:00Z Because of their structure, salt ions can bind to contaminants in soils and sediments, forming "chemical cocktails" that circulate in the environment and have detrimental effects. Humans are disrupting natural 'salt cycle' on a global scale, new study shows 2023-10-31T04:00:00Z In a study published in eLife earlier this year, the team obtained genetic material that had been left behind over the past century by plants, animals and bacteria in the sediment of a lake. How AI Can Help Save Endangered Species 2023-10-31T04:00:00Z For a long time, a certain type of fossil lipid, so-called 2-methylhopanes, was considered to be an important biomarker for Cyanobacteria in sediments, some of which are hundreds of millions of years old. Genetic methods enable the use of fossil lipids as biomarkers for oxygen-producing primordial bacteria 2023-10-27T04:00:00Z So MBL's personnel teamed up with scientists who already had very large DNA sequencing datasets from microbes in Massachusetts and Alabama salt marsh sediments, and the project was launched. Analysis finds diversity on the smallest scales in sulfur-cycling salt marsh microbes 2023-10-26T04:00:00Z In a 2021 report they concluded that a number of factors were likely contributing to lake expansion, including land use changes that have accelerated runoff and caused sediment to build up on lake bottoms. In Kenya, flooding lakes have displaced thousands. A novel lawsuit blames climate change 2023-10-26T04:00:00Z Burn scars are more prone to flooding and erosion, and runoff becomes tainted with ash and sediment. Fire, other ravages jeopardize California’s prized forests 2023-10-25T04:00:00Z The sediment layers were dated and environmental DNA was extracted for sequencing. How AI Can Help Save Endangered Species 2023-10-31T04:00:00Z For this, they combined their molecular data with new sediment analyses carried out under high-purity conditions. Genetic methods enable the use of fossil lipids as biomarkers for oxygen-producing primordial bacteria 2023-10-27T04:00:00Z The money he spends on dredging sediment that the water picks up as it flows over disturbed ground is roughly equal to his average rebate of $12,000 a year. Depleted Groundwater Could Be Refilled by Borrowing a Trick from Solar Power 2023-10-25T04:00:00Z The storm also stirred up sediment and warm water off the coast of Florida. Flesh-Eating Bacteria Cases Spiked in Florida after Hurricane Ian 2023-10-24T04:00:00Z "We have everything to learn about Mars by better understanding how these river deposits can be interpreted stratigraphically, thinking about rocks today as layers of sediment deposited over time," Cardenas said. Curiosity rover finds new evidence of ancient Mars rivers, a key signal for life 2023-10-24T04:00:00Z The reason the water is black is that it contains large amounts of dissolved organic material and hardly any sediment because of the river's low gradient. Researchers study one of the world's darkest rivers 2023-10-18T04:00:00Z In addition, because Precambrian biomarker records are extremely sensitive to contamination, the researchers used an ultra-clean method to extract organic matter from sediment cores. Genetic methods enable the use of fossil lipids as biomarkers for oxygen-producing primordial bacteria 2023-10-27T04:00:00Z Within months, however, that sediment will be covered with a fine, green carpet of seedlings and colorful splashes of flowers, many planted by Chenoweth’s team. Historic dam removal poses challenge of restoring both river and landscape 2023-10-18T04:00:00Z Over 4,800 years in the Northern Rockies during wet periods and dry periods, subalpine forests consistently recovered from wildfires, growing back vegetation and leaving evidence of their resilience in lake sediment cores. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z "On Earth, river corridors are so important for life, chemical cycles, nutrient cycles and sediment cycles. Everything is pointing to these rivers behaving similarly on Mars." Curiosity rover finds new evidence of ancient Mars rivers, a key signal for life 2023-10-24T04:00:00Z The killer combination of a topographically flat and bone-dry interior could also stifle any river-borne transport of carbon-rich sediments otherwise destined to be sequestered in the ocean. Will the Next Supercontinent Really Drive Mammals to Extinction? 2023-10-17T04:00:00Z Some filter their wines; others leave them cloudy and full of sediment. The ancient ways of natural wine is finding new fans 2023-10-16T04:00:00Z Over the millions of years that followed, rivers built up the basin floor with sediments while volcanoes belched eruptions nearby. Why are the Appalachian Mountains home to so many supernatural legends? 2023-10-13T04:00:00Z Then, layer after layer, they hand-drilled through years of sediment at the bottom of the lake. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z They found more cobalt in sediments from the past ice ages, compared to more recent sediments. Large swings in past ocean oxygen revealed 2023-10-12T04:00:00Z The report includes data through August, and water managers said it will take more time to see the full effects of water that percolates through soil and sediment to aquifers. California's epic rain year boosted groundwater levels, but not enough to recoup losses 2023-10-13T04:00:00Z The red planet’s sedimentary rocks mostly formed when water helped glue together sediments that accumulated in ancient rivers, lakes, and sand dunes. Earth is a geological oddball in our solar system. This is why. 2023-10-12T04:00:00Z Warming can be due to increased wetness, disturbance to the protective layer of organic matter or sediment deposition, allowing more heat to penetrate. Flooding that closed Alaska's Dalton Highway also caused widespread ground sinking 2023-10-11T04:00:00Z The oldest sediment core measured about seven meters long, 7600 years old, with layers indicating time stamps like the Mount St. Helens and Crater Lake eruptions. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z It raised concerns that high levels of sediment in the water “created lethal conditions” for spring-run Chinook. With salmon at risk of extinction, California begins urgent rescue effort 2023-10-12T04:00:00Z It is tracked by three small fishes, hoping the crab's movements will expose an opportunistic meal in the sediment. Wildlife Photographer of the Year: Horseshoe crab wins gold 2023-10-10T04:00:00Z Earth’s sands are often white and its sandstones are usually full of quartz because the mineral is common in granite and it’s very hard to degrade, so it builds up in sediments. Earth is a geological oddball in our solar system. This is why. 2023-10-12T04:00:00Z These can include organic layer disturbance and sediment deposition, which settles into the soil and drives out its insulating air pockets and allows more heat to penetrate. Flooding that closed Alaska's Dalton Highway also caused widespread ground sinking 2023-10-11T04:00:00Z After a few days of sediment collection, they brought the 13 cores back to the lab where they sliced the mud-like samples into hundreds of half-centimeter intervals. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z Another blow came this summer, when a breach in Pacific Gas & Electric’s Butte Canal sent a rust-colored sediment spill coursing into Butte Creek. With salmon at risk of extinction, California begins urgent rescue effort 2023-10-12T04:00:00Z "They get shed from leaf surfaces and find their way to ocean sediments, where we can extract them and study their chemical composition." Paleoclimatologists use ancient sediment to explore future climate in Africa 2023-10-10T04:00:00Z The use of radium isotopes allowed the scientists to track how much nutrient is transported from the land and shelf sediments via invisible groundwater flows. Discovery of invisible nutrient discharge on Great Barrier Reef raises concerns 2023-10-09T04:00:00Z It deposits sediment, which in turn allows for an increase in insulating vegetation cover and other organic matter. Flooding that closed Alaska's Dalton Highway also caused widespread ground sinking 2023-10-11T04:00:00Z Results from the new analysis of lake sediment cores from a Montana subalpine lake, published today in the Journal of Ecology, were surprising. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z Its pollen has been found in sediment cores from several Maya reservoirs. Ancient Maya reservoirs offer lessons for today's water crises 2023-10-09T04:00:00Z Plants use hydrogen from rainwater to produce the waxy outer coating on their leaves, which survives in ocean sediment for millions of years. Paleoclimatologists use ancient sediment to explore future climate in Africa 2023-10-10T04:00:00Z When the water drawdown started on August 7, however, those salvaging efforts were not completed, stranding and exposing thousands of lamprey in the sediment, according to the complaint. Oregon seeks $27M for dam repair it says resulted in mass death of Pacific lamprey fish 2023-10-06T04:00:00Z Ocean currents determine the structure of the deep-sea ocean floor and the transport of sediments, organic carbon, nutrients and pollutants. Deciphering the intensity of past ocean currents 2023-10-06T04:00:00Z Like tree rings, lake sediment cores act as natural archives, but they document a much larger time frame, producing records that date back thousands of years compared to centuries. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z A layer of sediment would be needed for plants' roots. Ancient Maya reservoirs offer lessons for today's water crises 2023-10-09T04:00:00Z The leaf wax functions as a time capsule preserved in ocean sediment. Paleoclimatologists use ancient sediment to explore future climate in Africa 2023-10-10T04:00:00Z In the new study, the researchers determined the radiocarbon age of microscopic pollen grains in the sediment layers, which hadn’t grown in the lake water. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z These sediment deposits contain information about past ocean conditions as well as clues to climate. Deciphering the intensity of past ocean currents 2023-10-06T04:00:00Z As sediment settles into lake bottoms in layers they accumulate, with the oldest at the bottom and youngest at the top. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z A sediment core from one of Tikal's reservoirs also found that zeolite sand had been used in its construction. Ancient Maya reservoirs offer lessons for today's water crises 2023-10-09T04:00:00Z Researchers dilute sediment cores with a variety of solvents. Paleoclimatologists use ancient sediment to explore future climate in Africa 2023-10-10T04:00:00Z The researchers also dated the sediments with a technique called optically stimulated luminescence, which can determine when minerals were last exposed to daylight. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z Currents and sediment input in the flume tank were simulated using pumps and monitored with a current meter. Deciphering the intensity of past ocean currents 2023-10-06T04:00:00Z Collecting the lake sediment samples in a beautiful subalpine lake was cold, arduous work, Clark-Wolf said. Subalpine forests in the Northern Rockies are fire resilient--for now 2023-10-17T04:00:00Z Some of these plants have been identified in sediment cores from Maya reservoirs. Ancient Maya reservoirs offer lessons for today's water crises 2023-10-09T04:00:00Z They isolated thousands of conifer pollen grains from the same sediment layers as the ditchgrass seeds. New tests confirm antiquity of ancient human footprints in New Mexico 2023-10-05T04:00:00Z Samples for the technique must be processed in the dark, which the scientists achieved by hammering tubes into the buried sediments and studying them under red light that wouldn’t affect the dating, Pigati says. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z The formation and development of the sediment deposits were measured with a laser scanner. Deciphering the intensity of past ocean currents 2023-10-06T04:00:00Z The sediment covering the footprints must have been carried in by a stream or blown in by the wind, he says, and this burying layer could have eroded out of much older rocks. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z There won’t be major dam-wrecking explosions, he said, but workers plan to blast open some dam tunnels to move out tons of accumulated sediment from the reservoirs. The largest dam removal in history stirs hopes of restoring California tribes’ way of life 2023-10-05T04:00:00Z The researchers also used optically stimulated luminescence dating to determine the age of quartz grains within the footprint-bearing sediments. New tests confirm antiquity of ancient human footprints in New Mexico 2023-10-05T04:00:00Z The researchers determined the ages of pollen grains and tiny quartz crystals in sediments beside the footprints, which are buried a few feet below the surface. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z The scientists used luminescence dating techniques to help establish the age of the sediment the tools were buried in. Early human migrants followed lush corridor-route out of Africa 2023-10-04T04:00:00Z But Davis would like to see more OSL dates from samples taken directly from the sediments that contain the footprints. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z But fish populations have also been ravaged by other factors, including gold mining that scarred the watershed, and decades of logging that left denuded areas, releasing fish-harming sediment into the river. The largest dam removal in history stirs hopes of restoring California tribes’ way of life 2023-10-05T04:00:00Z It found that the footprint-bearing sediment layers had a minimum age of about 21,500 years. New tests confirm antiquity of ancient human footprints in New Mexico 2023-10-05T04:00:00Z The work confirms a 2021 study’s findings, which were based on radiocarbon dates from aquatic plant seeds in the sediments. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z This method estimates how long it has been since sediment was last exposed to light. Early human migrants followed lush corridor-route out of Africa 2023-10-04T04:00:00Z They extracted pollen from the same layers of sediment targeted in the first paper, which lie underneath, between, and on top of various sets of footprints. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z This usually happens when water-rich sediments are buried with the fault, trapping the water underground. Discovery of massive undersea water reservoir could explain New Zealand's mysterious slow earthquakes 2023-10-04T04:00:00Z "And just like today, if anyone walks in a similar setting, their footprints are preserved if they are covered with another layer of sediment," Springer added. New tests confirm antiquity of ancient human footprints in New Mexico 2023-10-05T04:00:00Z Both groups contend that mining operations have led to strain in the area, whether related to mining trucks frequenting narrow roads or sediment runoff flowing into salmon habitat. Lawsuits over Columbia Gorge gravel pit slow after court denies review 2023-10-03T04:00:00Z In areas where the experienced relative sea level rise caused by subsidence is not compensated by sufficient sediment supply, the mangroves' ability to stabilize the coastline will deteriorate. Sustainable protection of rapidly subsiding coastlines with mangroves 2023-10-02T04:00:00Z The effort started with the team examining a sample of clay-like sediment that Glass acquired from the seafloor off the coast of Oregon. Novel bacterial proteins from seafloor shine light on climate and astrobiology 2023-09-27T04:00:00Z However, the New Zealand fault contains little of this typical ocean sediment. Discovery of massive undersea water reservoir could explain New Zealand's mysterious slow earthquakes 2023-10-04T04:00:00Z They compared the hydrogen isotopic composition of aquatic plant waxes within the sediment to biomarkers from terrestrial plants and other sources. Ancient plant wax reveals how global warming affects methane in Arctic lakes 2023-09-29T04:00:00Z Researchers last year reported the discovery of DNA from animals, plants and microbes dating to about 2 million years ago from sediment at Greenland's remote northernmost point. DNA remnants found in fossil of 6 million year old turtle 2023-09-28T04:00:00Z But an adequate supply of sediment needs to be available along the shore. Sustainable protection of rapidly subsiding coastlines with mangroves 2023-10-02T04:00:00Z Glass hypothesized that the sediment would contain proteins that influence the growth of methane clathrate, and that those proteins would resemble well-known antifreeze proteins in fish, which help them survive in cold environments. Novel bacterial proteins from seafloor shine light on climate and astrobiology 2023-09-27T04:00:00Z Researchers have discovered a sea's worth of water locked within the sediment and rock of a lost volcanic plateau that's now deep in the Earth's crust. Discovery of massive undersea water reservoir could explain New Zealand's mysterious slow earthquakes 2023-10-04T04:00:00Z These wax biomarkers -- which were once a part of common aquatic brown mosses -- were preserved in sediment buried beneath four lakes in Greenland. Ancient plant wax reveals how global warming affects methane in Arctic lakes 2023-09-29T04:00:00Z The final meal of this animal—a trilobite—still sat in its guts as sediment buried its body in the sea floor of an ancient Paleozoic sea. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z Because it's a river basin, you have this Mississippi River dumping a lot of sediment and it's just been doing that for millions of years. Transforming old oil rigs into seaweed farms could resurrect "dead zones" in the ocean 2023-09-26T04:00:00Z But to confirm her hypothesis, Glass and her research team would first have to identify protein candidates out of millions of potential targets contained in the sediment. Novel bacterial proteins from seafloor shine light on climate and astrobiology 2023-09-27T04:00:00Z Gase used seismic scans to build a 3D picture of the ancient volcanic plateau in which he saw thick, layered sediments surrounding buried volcanoes. Discovery of massive undersea water reservoir could explain New Zealand's mysterious slow earthquakes 2023-10-04T04:00:00Z The research, published in Science of the Total Environment, represents the first combined analysis of microplastics in water, sediment and air around a major river system. Rivers contain hidden sinks and sources of microplastics 2023-09-25T04:00:00Z A private collector first discovered the trilobite fossil more than a century ago—or at least the small sphere of ancient sediment that contained it. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z So you don't have rocks buried under a lot of sediment, so a lot of marine organisms like oysters and corals, they don't want to grow on mud. Transforming old oil rigs into seaweed farms could resurrect "dead zones" in the ocean 2023-09-26T04:00:00Z The first step was to use DNA sequencing paired with bioinformatics to identify the genes of the proteins contained in the sediment. Novel bacterial proteins from seafloor shine light on climate and astrobiology 2023-09-27T04:00:00Z Even when fossils aren’t available, scientists today can capture DNA from soil and sediment where archaic humans once lived. We carry DNA from extinct cousins like Neanderthals. Science is now revealing their genetic legacy 2023-09-24T04:00:00Z Significant quantities of microplastic particles are being trapped in riverbed sediments or carried through the air along major river systems, a new study has shown. Rivers contain hidden sinks and sources of microplastics 2023-09-25T04:00:00Z The nodules formed when sediment hardened very quickly around animals at very shallow depths. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z These actions have reduced the amount of PCBs in the river’s sediment by half, according to the group. Toxic legacy of Duwamish River could cost Boeing, taxpayers $1 billion 2023-09-24T04:00:00Z Researchers from the study into turtles’ nuclear signatures speculate that the clean-up disturbed contaminated sediments that had settled in the atoll’s lagoon. ‘Nature does not forget’: These 4 animals are radioactive 2023-09-21T04:00:00Z "Animals grazing on flood-plains may also eat contaminated plant material and sediment, especially after flooding, when fresh metal-rich sediment is deposited," the scientists explained in their paper. Metal-mining pollution impacts 23 million people worldwide 2023-09-21T04:00:00Z In addition, analysis by scientists found 57 particles per kilogram on average in sediment from the riverbed as well as one particle in every 20 litres of water. Rivers contain hidden sinks and sources of microplastics 2023-09-25T04:00:00Z This week in Microbiology Spectrum, Wang and an international group of researchers report the discovery of a new virus isolated from sediment brought up from a depth of 8,900 meters. A newly identified virus emerges from the deep 2023-09-20T04:00:00Z In-water work, which will involve dredging and barging away contaminated sediment, can only happen during a short window, typically October to February, to avoid interfering with fish migration or fishing treaties. Toxic legacy of Duwamish River could cost Boeing, taxpayers $1 billion 2023-09-24T04:00:00Z They believe this sediment was then swallowed by the turtles while swimming, or it affected the algae and seaweed that make up large parts of sea turtle diets. ‘Nature does not forget’: These 4 animals are radioactive 2023-09-21T04:00:00Z "A good deal of river monitoring is focused on water when the real 'nasties' are often associated with river sediments," he told BBC News. Metal-mining pollution impacts 23 million people worldwide 2023-09-21T04:00:00Z The sediment samples often contained denser microplastic particles than those found in water and air, and higher population densities correlated with increased microplastic abundance for air and water samples. Rivers contain hidden sinks and sources of microplastics 2023-09-25T04:00:00Z The researchers also used a technique called optically stimulated luminescence to determine when grains of quartz and feldspar in the adjacent sediments were last exposed to sunlight. Earliest Evidence of Wooden Construction Uncovered 2023-09-20T04:00:00Z The river had washed away the sediment but, for the moment, left the stick. Half-million-year-old ‘Lincoln Logs’ may be first wood structure made by ancient humans 2023-09-20T04:00:00Z Traces of radiation in those sediments made their way into the turtle’s shell in layers scientists could measure, says Cyler Conrad, a researcher at Pacific Northwest National Laboratory who led the study. ‘Nature does not forget’: These 4 animals are radioactive 2023-09-21T04:00:00Z Prof Macklin explained that the majority of metals from metal mining is bound up in sediment in the ground. Metal-mining pollution impacts 23 million people worldwide 2023-09-21T04:00:00Z Mackey expected to have a slew of papers about sediment transport in Lake Fryxell when he came up for tenure review next year. U.S. cancels or curtails half of its Antarctic research projects 2023-09-13T04:00:00Z That object, too, was a rare example of wood preserved in river sediments. Earliest Evidence of Wooden Construction Uncovered 2023-09-20T04:00:00Z At Kalambo Falls, the wet conditions that make excavation so frustrating are ideal for preserving wood, Barham explains, because waterlogged sediment prevents decomposition. Half-million-year-old ‘Lincoln Logs’ may be first wood structure made by ancient humans 2023-09-20T04:00:00Z It could also slow the movement of sediment that’s vital to the health of Louisiana and the Gulf of Mexico, among many other problems, she said. Dry states taking Mississippi River water isn’t a new idea. But some mayors want to kill it 2023-09-12T04:00:00Z Prof Macklin and his colleagues used previously published field and laboratory analyses to work out how far this metal-contaminated sediment moves down river systems. Metal-mining pollution impacts 23 million people worldwide 2023-09-21T04:00:00Z “The weaker alluvial sediments can amplify shaking, and mountains are vulnerable to landsliding, including along the roads that lead to mountain villages.” What made the earthquake in Morocco so devastating 2023-09-11T04:00:00Z At New Zealand’s Scott Base — which is being redeveloped — contamination left from past fuel spills and poor waste management has been detected in soil and marine sediments. Antarctic Research Stations Polluted a Pristine Wilderness 2023-09-11T04:00:00Z Its intensity is a measure of time since the sediment was last exposed to daylight. Half-million-year-old ‘Lincoln Logs’ may be first wood structure made by ancient humans 2023-09-20T04:00:00Z Water from the lake percolated through nearby rocks and leached lithium into the caldera basin that was left as sediment after the lake dried up several hundred years ago. A new era: Construction of strategic lithium processing plant kicks off 2023-09-06T04:00:00Z Young and adult endangered pupfish at Devils Hole cavern survived, although eggs were likely smothered by sediment, the park said on social media last month. Reshaped Death Valley park could take months to reopen after damage from Hilary 2023-09-04T04:00:00Z This little suburban lake happens to be extraordinarily deep, with perfect chemistry for chronicling annual deposits of sediment, pollution and pollen grains over thousands of years. Opinion: The atomic bomb laid down the marker for humanity's era of catastrophic change 2023-09-03T04:00:00Z An ongoing drought in Texas has dried out the Paluxy River, revealing over 70 new dinosaur tracks hidden beneath the now-desiccated sediment at the bottom of the riverbed. Drought in Texas reveals dinosaur tracks hidden beneath a dried-out riverbed 2023-09-02T04:00:00Z Although the park is known for dinosaur tracks, the new ones are typically covered with water and sediment from the Paluxy River and are not visible. New dinosaur tracks from 113 million years ago revealed by Texas drought 2023-08-30T04:00:00Z All were discovered in the sediment of the box, which at Monday’s ceremonial opening at the New York academy appeared to be its only contents. West Point time capsule that appeared to contain nothing more than silt yields centuries-old coins 2023-08-30T04:00:00Z Instead, they let out a groan after experts pried open the top and pointed a camera inside to show just a layer of sediment on the bottom. After lots of hype, West Point treasure box opening yields no bombshells, just silt 2023-08-28T04:00:00Z Scientists believe that the sediment layers of a lake in Canada point to a new era marked by the damaging consequences of human activities. Opinion: The atomic bomb laid down the marker for humanity's era of catastrophic change 2023-09-03T04:00:00Z When rains return, the tracks will again be buried beneath sediment, which does help preserve them in the geological short-term. Drought in Texas reveals dinosaur tracks hidden beneath a dried-out riverbed 2023-09-02T04:00:00Z The dinosaurs would have left their footprints in sediment, which eventually hardened into what is now limestone. New dinosaur tracks from 113 million years ago revealed by Texas drought 2023-08-30T04:00:00Z It was probably better to extract the coins and medal in a controlled setting anyway, said Hudson, who still plans to analyze the sediment for more clues about what else may have been inside. West Point time capsule that appeared to contain nothing more than silt yields centuries-old coins 2023-08-30T04:00:00Z Military Academy primed to see military relics or historical documents pulled from the box instead watched as experts pried open the top and announced there was just a layer of sediment on the bottom. After lots of hype, West Point treasure box opening yields no bombshells, just silt 2023-08-28T04:00:00Z Rocks and sediment were strewn across their Oak Glen orchard, Willowbrook Farm, and another the couple owns in nearby Cherry Valley, called Goodie Farm. Coachella residents left to dig out after Hilary floods area 2023-08-22T04:00:00Z While working in a lab in the Netherlands in the late 2000s, Strous noticed that a type of methane-feeding bacteria often found in lake sediments and wastewater sludges had a strange way of life. Cells Discovered Making ‘Dark Oxygen’ Underground 2023-08-22T04:00:00Z They will be reburied and filled with sediment after a good rain or two, which helps prevent them from eroding away. New dinosaur tracks from 113 million years ago revealed by Texas drought 2023-08-30T04:00:00Z It appeared that moisture and perhaps sediment seeped in to the box from a damaged seam. West Point time capsule that appeared to contain nothing more than silt yields centuries-old coins 2023-08-30T04:00:00Z Hudson said it appeared that moisture seeped in from a damaged seam on the box and it was likely that sediment got inside. After lots of hype, West Point treasure box opening yields no bombshells, just silt 2023-08-28T04:00:00Z Dredges whir to life and idyllic coastlines from Santa Cruz to San Diego routinely turn into construction zones, with dump trucks and sand dozers pushing sediment for hours across the starving shore. In the face of sea level rise, can we reimagine California's vanishing coastline? 2023-08-22T04:00:00Z A culvert that winds through Oak Glen, a tiny community dotted with family-owned orchards and bed-and-breakfasts, was deluged with a slurry of rainwater, rocks and sediment. A rumbling. A groan. A wicked sound. Then a wall of mud and water brings destruction 2023-08-21T04:00:00Z A few dead Lime scooters rest in the sediment of Latah Creek, which empties into the Spokane River a mile or so west of downtown. Why Lime scooters tossed into the Spokane River stay there 2023-08-19T04:00:00Z Archaeologists examined sediment in 2,700-year-old toilets in Jerusalem and found the oldest known traces of Giardia duodenalis, a pathogen that can cause the intestinal malady dysentery. Science News Briefs from around the World: September 2023 2023-08-19T04:00:00Z “We’re going to remove all of that sediment and we’ll screen it through some fine mesh screen and see if anything comes out of it,” Hudson said. After lots of hype, West Point treasure box opening yields no bombshells, just silt 2023-08-28T04:00:00Z To try to understand the fate of these mammals, O’Keefe and his colleagues analyzed sediment cores from a nearby lake that provided data on air temperature, salinity and precipitation. Fossils Buried in LA Tar Pit Show Why Saber-Toothed Cats Blinked Out of Existence 2023-08-17T04:00:00Z The storm had dumped rocks and sediment across both properties, damaging many of the trees just before the start of the apple picking season, she said. A rumbling. A groan. A wicked sound. Then a wall of mud and water brings destruction 2023-08-21T04:00:00Z Unlike other methods of fossilization in which organic matter is replaced over time by sediment, tar preserves a bone’s collagen, which is more conducive to getting a precise radiocarbon date. Wildfires once fueled extinctions in Southern California. Will it happen again? 2023-08-17T04:00:00Z New research found millennia-old flood sediments in northern Peru that suggest ancient communities were aware of the intermittent weather pattern's dangers and built walls to protect farmland. Science News Briefs from around the World: September 2023 2023-08-19T04:00:00Z Dr. Goldin said the floodwaters included heavy metals, pesticides and nutrients — nitrogen and phosphorus in particular — that had built up in the sediment behind the dam. As Dead Dolphins Wash Ashore, Ukraine Builds a Case of Ecocide Against Russia 2023-08-17T04:00:00Z Big machines would scrape the seafloor, scooping up nodules while kicking up clouds of sediment, potentially damaging the deep sea on a vast scale by removing habitat and species and altering ecosystems. Deep-Sea Mining Could Begin Soon, Regulated or Not 2023-08-15T04:00:00Z The first step in becoming a fossil is burial, and for immense sauropods that would have required an event that could deposit a lot of sediment on the body at once. How Sauropod Dinosaurs Became the Biggest Land Animals Again and Again 2023-08-15T04:00:00Z In Eagle Pass, sediment falling into the river from the installation of fences and buoys is already altering the water’s flow, according to environmentalists. New frontline of US border policy? A Texas pecan farm 2023-08-11T04:00:00Z If it works, the sediment will settle out in the basin and gradually restore land that has been steadily disappearing for decades. A billion-dollar coastal project begins in Louisiana. Will it work as sea levels rise? 2023-08-10T04:00:00Z Evidence for the big freeze is found in sediments in the seabed off the coast of Lisbon, Portugal. Big freeze drove early humans out of Europe 2023-08-10T04:00:00Z This rain of sediment is likely to cause problems for midwater swimmers, such as jellyfish, by interfering with their visual communication cues or their ability to filter food from the water. Deep-Sea Mining Could Begin Soon, Regulated or Not 2023-08-15T04:00:00Z Coastal experts say south Louisiana was built by sediment deposited as the powerful river continuously altered its own crooked, meandering course over thousands of years. A billion-dollar coastal project begins in Louisiana. Will it work as sea levels rise? 2023-08-09T04:00:00Z The $750,000 repair will include leveling the tracks, replacement of concrete panels beneath and alongside the rails, and adding fill sediment below the surface. Repairs to sinking tracks mean tough days ahead for light-rail riders 2023-08-08T04:00:00Z “The Mississippi River built Louisiana –- and finally reconnecting it with coastal areas that are currently starved of freshwater and sediment will ensure our future,” U.S. A billion-dollar coastal project begins in Louisiana. Will it work as sea levels rise? 2023-08-10T04:00:00Z Researchers at the IBS Centre for Climate Physics in Busan, in South Korea, ran computer model simulations using data from the sediments. Big freeze drove early humans out of Europe 2023-08-10T04:00:00Z A typical harvester is fitted with twin caterpillar tracks like those on an army tank so it can crawl across the seabed sediment. Deep-Sea Mining Could Begin Soon, Regulated or Not 2023-08-15T04:00:00Z Some researchers say this means that many small-scale mining operations disregard environmental laws restricting deforestation and the use of toxic liquid mercury to separate precious metal from sediment. Insight: Amazon rainforest gold mining is poisoning scores of threatened species 2023-08-05T04:00:00Z As the algae bloom is winding down, some of the cells of the organism turn into cysts and deposit themselves into the sediments in the water. A toxic red tide has returned to the San Francisco Bay Area, after killing thousands of fish last year 2023-08-01T04:00:00Z The dam’s destruction has washed away vegetation, eroded riverbanks and contaminated drinking water sources with 150 tons of heavy fuel oil, in addition to polluted sediment and human and animal remains. The Ukraine War Is an Environmental Catastrophe with Global Consequences 2023-08-01T04:00:00Z Dead skeletons of the elkhorn corals were covered in algae, dust and sediment. Florida's coral is in hot water. Scientists are diving in to rescue the fragile creatures before it's too late 2023-08-01T04:00:00Z As the big machines crawl along, they will suspend large amounts of fine sediment in the water, which could settle as much as tens of kilometers away. Deep-Sea Mining Could Begin Soon, Regulated or Not 2023-08-15T04:00:00Z If there’s lots of sediment, that can raise temperatures, too, according to David Roth, a forecaster with the National Oceanic and Atmospheric Administration’s Climate Prediction Center. Water is refreshing in the heat, right? In parts of Florida this past week, not so much 2023-07-28T04:00:00Z On a recent visit to Kalaloch, the bluff faces were sheared off and raw, with big chunks of freshly fallen sediment lying on the beach below. Erosion forces Olympic National Park to take a hard look at Kalaloch Lodge 2023-07-28T04:00:00Z To work out these ancient figures, scientists use records like the air trapped in polar ice cores, or sediments in the deep ocean. Climate change: July set to be world's warmest month on record 2023-07-27T04:00:00Z At low tide, household trash, including old washing machines and soggy couches, float atop vast islands of accumulated sewage and sediment. Mangrove forest thrives around what was once Latin America’s largest landfill 2023-07-26T04:00:00Z Barron cites a 2022 study led by the Massachusetts Institute of Technology that found that the sediment plume kicked up by mining vehicles didn't disperse as widely as people thought it would. Deep-Sea Mining Could Begin Soon, Regulated or Not 2023-08-15T04:00:00Z Scientists are beginning to better understand the crucial ecological role they play in redistributing small marine organisms, as well as plastic, pollutants, sediment and debris in coastal waters. Dangerous Rip Currents Give Marine Life a Speed Boost 2023-07-25T04:00:00Z “Put all these things together — particularly on the Olympic coast, where we already get an ungodly amount of water falling from the sky, which saturates the sediments,” Fradkin says. Erosion forces Olympic National Park to take a hard look at Kalaloch Lodge 2023-07-28T04:00:00Z Evidence from ice and sediment cores indicates that the Atlantic circulation underwent abrupt stops and starts in the deep past. Warming Could Push the Atlantic Past a ‘Tipping Point’ This Century 2023-07-25T04:00:00Z Fields are covered with sediment and piles of sand from the river. Vermont farmers are urged to document crop losses from flooding 2023-07-24T04:00:00Z Onboard, the nodules would be cleaned before being transported to a shore-based facility for processing, and the waste sediment would be pumped back into the ocean through another long pipe. Deep-Sea Mining Could Begin Soon, Regulated or Not 2023-08-15T04:00:00Z The longer the sediment is buried, the more radiation accumulates as trapped electrons. When Greenland was green: Ancient soil from beneath a mile of ice offers warnings for the future 2023-07-23T04:00:00Z Camara analyzed a sediment core from the lake with layers dating back almost 3,000 years, and found algae have been living there all that time. Algae blooms that cause pink snow could accelerate melting as Earth warms 2023-07-21T04:00:00Z The same could not be said for the sediment, which was largely overlooked before vanishing completely. From an Ancient Soil Sample, Clues to an Ice Sheet’s Future 2023-07-21T04:00:00Z Over the next 50 years, belching out smoke, flames and fumes while contaminating soil, groundwater and sediment, the plant was an unwelcome neighbor, even after converting to marginally cleaner oil gasification in 1937. How Gas Works' belching hellscape turned into a postindustrial paradise 2023-07-20T04:00:00Z But deep-sea swimmers tend to get their food from the bottom of the ocean, feeding on sediments and organic matter in the seafloor or on other animals. Deep-Sea Mining Can Chase off Marine Life for Months 2023-07-18T04:00:00Z By measuring both isotopes in the same sample, glacial geologist Drew Christ was able to determine that melting ice had exposed the sediment at the land surface for less than 14,000 years. When Greenland was green: Ancient soil from beneath a mile of ice offers warnings for the future 2023-07-23T04:00:00Z Among dinosaur bones and sandy sediment there emerged a 167-million-year-old tiny jaw fragment with three teeth. Fossils Where They Don’t Belong? Maybe We Just Didn’t Look Hard Enough. 2023-07-16T04:00:00Z In 2017, the sediment was rediscovered in a freezer in Denmark. From an Ancient Soil Sample, Clues to an Ice Sheet’s Future 2023-07-21T04:00:00Z Reducing toxic lake sediment is next in a series of environmental remediations. How Gas Works' belching hellscape turned into a postindustrial paradise 2023-07-20T04:00:00Z Mining also stirs up plumes of sediments and other materials lodged in the seafloor, including heavy metals and other potentially toxic substances. Deep-Sea Mining Can Chase off Marine Life for Months 2023-07-18T04:00:00Z Decades of sediment have accumulated, at a rate of 35,000 cubic yards per year. Olympia’s Capitol Lake restoration: Pricey ‘boondoggle’ or environmental win? 2023-07-15T04:00:00Z When sediment on top of the rock gets too heavy for the weakened rock layer, the limestone caves in and creates sinkholes. Tampa-area sinkhole that killed man in 2013 opens for third time 2023-07-13T04:00:00Z Dr. Bierman and an international team of collaborators first began studying the sediment several years ago, and they quickly made a surprising discovery. From an Ancient Soil Sample, Clues to an Ice Sheet’s Future 2023-07-21T04:00:00Z Production there ended in 1945, but not before soil, sediments and some springs were contaminated. How America’s push for the atomic bomb spawned enduring radioactive waste problems in St. Louis 2023-07-12T04:00:00Z Dating of the ornaments and sediment at the Brazil site where they were found point to an age of 25,000 to 27,000 years ago, the researchers reported. Pendants made from giant sloths suggest earlier arrival of people in the Americas 2023-07-11T04:00:00Z With each passing year, the force of the Deschutes River, which feeds the lake on its way to Puget Sound, thrusts sediment into the lake, making it shallower. Olympia’s Capitol Lake restoration: Pricey ‘boondoggle’ or environmental win? 2023-07-15T04:00:00Z From a data perspective, a river's depth, width and flow are often adjusted to meet the demands of how this sediment moves. Planetary scientists predict how rivers flow on Mars and Titan 2023-07-10T04:00:00Z Yet even if fertilizer runoff stopped tomorrow, the algae threat would persist for decades or more because there is already so much phosphorus tied up in cropland soils and lake sediment. Gambling on a desperate measure to save lifeline of the Everglades 2023-07-10T04:00:00Z He showed me a video he shot about 10 miles along the coast, off Bahubulu Island, of a coral reef "suffocated" by sediment. The rush for nickel: 'They are destroying our future' 2023-07-09T04:00:00Z The PM10 was harmful on its own, but the presence of these elements in the sediment, according to Schade, was a "double whammy." Scientists warned of a Salton Sea disaster. No one listened 2023-07-07T04:00:00Z Excavations revealed artefacts in deep Ice Age sediments preserved on a hillside above the Medway Valley. Giant stone artefacts found on rare Ice Age site in Kent 2023-07-06T04:00:00Z Birch and his colleagues found, to their surprise, that the rivers on Titan move quite slowly and require less energy to mobilize to sediment. Planetary scientists predict how rivers flow on Mars and Titan 2023-07-10T04:00:00Z Crews built a sloped shoreline, beginning with rock to armor the beach, followed by sand and gravel and soft, loose sediments, in an attempt to mirror the natural Elliott Bay ecosystem. Downtown Seattle’s new beach offers refuge for people, salmon 2023-07-03T04:00:00Z Many earthquakes remain lost to history, but the available data suggest that 14 major earthquakes, the scars of which are engraved in the topography and sediments of the region, have occurred in Kashmir’s recorded past. Earthquake Resilience in Kashmir Lies in Traditional Architecture 2023-07-03T04:00:00Z Krantz, in his written testimony, painted a bleak picture: If the transfers went through, the Salton Sea would contract dramatically, dropping by up to 30 feet and exposing huge expanses of lake bottom sediment. Scientists warned of a Salton Sea disaster. No one listened 2023-07-07T04:00:00Z Once valuable materials are taken extracted, slurry sediment plumes are sometimes pumped back into the sea. Deep sea mining permits may be coming soon. What are they and what might happen? 2023-07-02T04:00:00Z "And then the other thing that I thought was super exciting, because the rivers are so buoyant it just takes like a little trickle to mobilize sediment on Titan." Planetary scientists predict how rivers flow on Mars and Titan 2023-07-10T04:00:00Z After it sank, it remained buried in sediment for more than two millennia until changes in sea currents due to construction on the shore unearthed it almost 30 years ago. Spanish archaeologists plan rescue of 2,500-year-old Phoenician shipwreck 2023-06-30T04:00:00Z The robot, called Shack and designed by Reefgen in San Francisco, holds 20,000 seeds mixed with mud which it injects into the sediment in the seabed. Climate change: Robots help seagrass restoration 2023-06-29T04:00:00Z The Langseth crisscrossed the region, towing long strings of hydrophones to catch reflections from nearly 150,000 airgun blasts, which penetrate the water and bounce off layers of sediment and rock under the sea floor. Undersea mountains help lubricate ‘slow slip’ earthquakes 2023-06-21T04:00:00Z “This animal is really telling us a lot of stories,” he said, adding that his team also found five other members of this species in nearby sediments. A Bear That Looked Like a Raccoon and Had a Dangerous Appetite 2023-06-18T04:00:00Z We were using a new seafloor-surveying system that had been built at the Pacific Geoscience Center in Canada to map sediments. Found: Giant Freshwater Deposits Hiding under the Sea 2023-06-17T04:00:00Z That method estimates how long it’s been since bits of sediment were last exposed to light and gives a reliable date only if the sediment around an artifact is undisturbed. Ancient humans traveled half the world to Asia before main migration out of Africa 2023-06-13T04:00:00Z The four Klamath dams hold back about 15 million cubic yards of sediment. The massive dam removal on the Klamath may save salmon but can’t solve the West’s water crisis 2023-06-11T04:00:00Z Like a lead blocker ahead of a running back, the seamount shielded a pile of water-logged seafloor sediments nearly 20 kilometers long, keeping it from being scoured away by the top plate. Undersea mountains help lubricate ‘slow slip’ earthquakes 2023-06-21T04:00:00Z Important wetlands along the reservoir, including the Velyki and Mali Kuchuhury archipelago, will suffer from desiccation, and ecologists are concerned that invasive plants, such as ragweed and goldenrod, will colonize newly exposed sediment. Destruction of Ukrainian dam threatens nature reserves, rare species 2023-06-09T04:00:00Z The fresh water is surrounded by sediments containing seawater. Found: Giant Freshwater Deposits Hiding under the Sea 2023-06-17T04:00:00Z Every year, seasonal floods wash sediment and sometimes bones from the surface into its depths, building up a layered record. Ancient humans traveled half the world to Asia before main migration out of Africa 2023-06-13T04:00:00Z While the river will naturally flush much of that, crews will also dredge to make way for the sediment flows. The massive dam removal on the Klamath may save salmon but can’t solve the West’s water crisis 2023-06-11T04:00:00Z Perhaps even more important than the water carried by seamounts are the slick sediments they shed as they slowly erode over millions of years. Undersea mountains help lubricate ‘slow slip’ earthquakes 2023-06-21T04:00:00Z And sediment flowing from the reservoir is laced with heavy metals and other toxic chemicals from decades of industrial pollution. Destruction of Ukrainian dam threatens nature reserves, rare species 2023-06-09T04:00:00Z The weight of the ocean above pushes water down into the sediment as far as it can go. Found: Giant Freshwater Deposits Hiding under the Sea 2023-06-17T04:00:00Z There are clay layers in many areas that hinder the downward movement of water, while in other areas, water passes swiftly through permeable layers of sediment. Winter storms boost Central Valley water supplies, but aquifer levels remain depleted 2023-06-09T04:00:00Z Oral history and archaeological studies suggest Indigenous people have long cultivated intertidal habitat through tilling sediment, selective harvesting and adding shells. Indigenous people from across Pacific help build Swinomish clam garden 2023-06-08T04:00:00Z Now, after years of analyzing the surfaces and sediments of the elaborate underground cave, the same team of scientists is making another splashy announcement: Homo naledi — despite their tiny brains — buried their dead in graves. Ancient Human Relatives Buried Their Dead in Caves, New Theory Claims 2023-06-05T04:00:00Z But the bone fragments showed no traces of gnaw marks, and analysis of the cave environment and sediments ruled out water deposition. A mysterious human species may have been the first to bury their dead 2023-06-05T04:00:00Z The rock and sediments that make up the world's continental shelves are not dry. Found: Giant Freshwater Deposits Hiding under the Sea 2023-06-17T04:00:00Z They removed two big chunks of sediment with bones inside, encased them in plaster, and took them to their lab. Was a small-brained human relative the world’s first gravedigger—and artist? 2023-06-04T04:00:00Z Government lawyers said the underlying violations included the failure to maintain and ensure the stability of a dam, violating pollution limits and not controlling erosion or sediment from mine sites. West Virginia governor’s coal empire sued by the federal government — again 2023-06-02T04:00:00Z But as they dug up more sediment in 2018, they observed that two fairly complete skeletons rested inside oval depressions. Ancient Human Relatives Buried Their Dead in Caves, New Theory Claims 2023-06-05T04:00:00Z In addition, the composition of fill material in the pits differs from surrounding sediments. A mysterious human species may have been the first to bury their dead 2023-06-05T04:00:00Z For this long-distance flow to occur and for the water to remain fresh, there needs to be a cap over the marine aquifer—a layer that is not permeable, usually of compacted clay-rich sediment. Found: Giant Freshwater Deposits Hiding under the Sea 2023-06-17T04:00:00Z When the river basin was diked and drained for agriculture, the river became rigid and channeled, acting as a firehose for sediment headed downriver from the stream’s upper reaches. Emergency repairs underway at Skagit River jetty after hundreds of dead baby salmon were found 2023-06-02T04:00:00Z It’s effectively impossible to identify when an toxic algae bloom may occur, she said, with factors like temperature, water flow, rainfall and the lake’s sediment all playing a role. Swimming this summer in Seattle? Here’s how to spot algae bloom 2023-06-02T04:00:00Z And it didn’t look as if the skeletons had formed the depressions by sinking into the sediment. Ancient Human Relatives Buried Their Dead in Caves, New Theory Claims 2023-06-05T04:00:00Z Some still maintain that water could have washed the bone fragments into natural depressions in the cave floor, which then filled with sediment over the years. A mysterious human species may have been the first to bury their dead 2023-06-05T04:00:00Z Or geologists might seek out clay-rich rocks or sediments that can capture concentrations of the rare earths after water erodes them from a source rock. Major U.S. geological survey aims to uncover minerals critical for batteries and microchips 2023-06-01T04:00:00Z The chemicals have also been detected in at least 15 of the state’s bodies of water, fish tissue, soil and sediment samples. WA AG sues PFAS manufacturers, seeks money for cleanup of drinking water 2023-05-30T04:00:00Z Besides sun, the composition of the lake’s sediment or runoff from human pollution can bring excess nutrients to algae — triggering a bloom. Swimming this summer in Seattle? Here’s how to spot algae bloom 2023-06-02T04:00:00Z Dr. Petraglia wanted to see more detailed analysis of the sediment and other kinds of evidence before judging whether the ovals were burials. Ancient Human Relatives Buried Their Dead in Caves, New Theory Claims 2023-06-05T04:00:00Z The phenomenon can result from a number of factors including sediment deposition or resource extraction, but in New York City it comes down to the sheer weight of the built environment. New York’s public housing is sinking — literally 2023-05-26T04:00:00Z By combining the new airborne data collected by Shah with field mapping and boreholes drilled to sample the deep sediments, Farrell and her colleagues hope to learn how the Carolina sands originated. Major U.S. geological survey aims to uncover minerals critical for batteries and microchips 2023-06-01T04:00:00Z There, seagrass has been growing and accumulating carbon in its plant matter, but also in the sediment, for more than 3,000 years, said Elizabeth Sinclair, an evolutionary biologist at the University of Western Australia. A Powerful Climate Solution Just Below the Ocean’s Surface 2023-05-24T04:00:00Z Fossils are formed when organisms are trapped in sediments or environments where their shapes are preserved. Fundamentals of Biology 2015-01-01T00:00:00Z Whereas the unpredictable flooding of the Tigris and Euphrates Rivers in southern Mesopotamia commonly brought destruction along with fresh alluvial deposits, the Nile’s summer flooding, predictable as clockwork, brought only welcome deposits of rich sediment. World History: to 1500 2023-04-19T00:00:00Z Some of this nitrogen falls to the ocean floor as sediment, which can then be moved to land in geologic time by uplift of Earth’s surface, and thereby incorporated into terrestrial rock. Concepts of Biology 2013-04-25T00:00:00Z The fish bypass will follow the original path of the Yuba River, before the federal government constructed a submerged concrete dam to contain mining debris and sediment in the early 1900s, officials said. Newsom touts $60-million plan for 'fishway' along Yuba River; critics say it falls short 2023-05-17T04:00:00Z When rocks crack, either because of strain from sediments layered on top of them or because of meteorite strikes, fluids can move into those cracks and deposit new minerals. What Created This Mini Book-Shaped Rock on Mars? 2023-05-17T04:00:00Z Paleobotanists collect fossil specimens in the field and place them in the context of the geological sediments and other fossilized organisms surrounding them. Fundamentals of Biology 2015-01-01T00:00:00Z There are also personal possessions, including dozens of shoes resting on the sediment. Titanic: First ever full-sized scans reveal wreck as never seen before 2023-05-17T04:00:00Z As human coastal populations increase, the runoff of sediment and agricultural chemicals has increased, causing some of the once-clear tropical waters to become cloudy. Concepts of Biology 2013-04-25T00:00:00Z The dam is mostly underwater, allowing the water to spill over the top of it while holding back a mountain of sediment. California pledges to build channel for threatened fish to bypass Gold Rush-era dam 2023-05-16T04:00:00Z The origin of this miniature sculpture likely stretches back some four billion years, when the sediments that make up the base of Gale Crater were being deposited, Schwenzer says. What Created This Mini Book-Shaped Rock on Mars? 2023-05-17T04:00:00Z Some marine sulfur becomes pyrite, which is trapped in sediment. Fundamentals of Biology 2015-01-01T00:00:00Z Water from melting glaciers has filled that fjord with excess sediment, which carries nutrients capable of upending the ecosystem’s balance — the same phenomena playing out in an estuary closer to home: the Chesapeake Bay. Small research schooner sets out on big Arctic mission 2023-05-15T04:00:00Z With increasing volume can come increased silt, and as the flow rate slows, the silt may settle, thus increasing the deposition of sediment. Concepts of Biology 2013-04-25T00:00:00Z The heavy downpours carry sediment into the bay, turning the sea cloudy and brown. Climate Change Brings Warmer, Wetter Weather to Trinidad 2023-05-15T04:00:00Z The murky sediment load carried by one keeps its distance from the clear blue-green of the other. Poem: ‘Confluence’ 2023-05-06T04:00:00Z Uplifting of ocean sediments can return carbon to land. Fundamentals of Biology 2015-01-01T00:00:00Z The sample came from a famed site called Denisova Cave, where ancient DNA from modern humans, Neanderthals, and Denisovans has been found in fossils and sediments, preserved by the cave’s cool, consistent conditions. Who wore this ancient deer pendant? DNA reveals a Stone Age woman with surprising origins 2023-05-03T04:00:00Z Paleobotanists determine the geological age of specimens and the nature of their environment using the geological sediments and fossil organisms surrounding them. Concepts of Biology 2013-04-25T00:00:00Z For decades, environmental managers have worked to restore lakes and improve water quality by dredging up the decaying organic matter in the sediments and often dumping it nearby or in landfills. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z In the east waterway sediments, the average concentration of PCBs, a group of substances often used for construction equipment and that don’t break down over time, is 460 parts per billion. null 2023-05-01T04:00:00Z Some organic nitrogen falls to the ocean floor as sediment. Fundamentals of Biology 2015-01-01T00:00:00Z When Essel opened the bag in a clean room, she could see the tip of a deer tooth pendant encased in sediment. Who wore this ancient deer pendant? DNA reveals a Stone Age woman with surprising origins 2023-05-03T04:00:00Z Oleanane was recovered from sediments dating from the Permian, much earlier than the current dates given for the appearance of the first flowering plants. Concepts of Biology 2013-04-25T00:00:00Z In a university lab, grasses planted in dredged lake sediments produced double the yield of crops grown in topsoil. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z “The real dirty pollution in sediments in the Duwamish River is largely from historical activities,” Ecology Water Quality Section Manager Rachel McCrea said. null 2023-05-01T04:00:00Z Some phosphate falls to the ocean floor where it becomes sediment. Fundamentals of Biology 2015-01-01T00:00:00Z But although they can get ancient human DNA from bones, teeth, and hair, and even from sediments, they have failed with artifacts more than a few hundred years old. Who wore this ancient deer pendant? DNA reveals a Stone Age woman with surprising origins 2023-05-03T04:00:00Z “If you have a deep basin, with sediments overlaying on the hard rock, those ground motions get amplified,” Jaiswal said. Seismic inflation: Projected losses from a future California earthquake soar 2023-04-30T04:00:00Z But as the sediment began to decompose in the field experiment, it emitted significantly more carbon dioxide. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z But they said that since CBG expanded its operations, including opening a bauxite storage site upriver in 2018, sediment has rendered the water uninhabitable for most fish and undrinkable for humans. On frontier of new ‘gold rush,’ quest for coveted EV metals yields misery If uplifting occurs, this sediment can return to land. Fundamentals of Biology 2015-01-01T00:00:00Z Dead and dying trees can also hold carbon, as long as they remain submerged in water or sediment. World’s Largest Logjam Stores 3 Million Tons of Carbon 2023-04-24T04:00:00Z They held up sediment and woody debris that would otherwise make its way down to nourish the downstream habitat. Tribe to fish for salmon on Elwha River a decade after dams fell 2023-04-25T04:00:00Z Also, because the recycled lake sediment was so packed with nutrients, the grass crops couldn’t absorb all of them. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z Rivers and streams across this region have been affected by mining, with the clearing of vegetation for mines and associated operations causing soil erosion, filling once-clear waters with sediment. On frontier of new ‘gold rush,’ quest for coveted EV metals yields misery Although the largest carbon reservoir in terrestrial ecosystems is in rocks and sediments, that carbon is not readily available. Fundamentals of Biology 2015-01-01T00:00:00Z And the river carried more sediment downstream, making it murkier. How 'rewiggling' Swindale Beck brought its fish back 2023-04-24T04:00:00Z Oysters are an important part of the Chesapeake Bay’s ecology because they filter sediment and nitrogen out of the water. Virginia expects largest oyster harvest in three decades 2023-04-21T04:00:00Z Because unrestored eutrophic lakes produce significant methane emissions, restoring lakes and recycling the sediments for agriculture could mean a net decrease in greenhouse gases reaching the atmosphere on an ecosystem scale, Kiani says. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z The states were looking to reduce harmful nutrient and sediment runoff that flows from farms and cities into the Chesapeake. EPA agrees to make Pennsylvania cut Chesapeake Bay pollution 2023-04-20T04:00:00Z The air-filled tissue—called aerenchyma—provides a path for oxygen to diffuse down to the root tips, which are embedded in oxygen-poor bottom sediments. Fundamentals of Biology 2015-01-01T00:00:00Z Artificially straightened rivers flow faster and pick up more sediment. How 'rewiggling' Swindale Beck brought its fish back 2023-04-24T04:00:00Z “The carrying capacity of the backwaters has reduced due to sediment deposition and encroachment, and the rainwater enters residential areas during the monsoon season.” ‘Mangrove Man’ in India fights to salvage sinking shores 2023-04-17T04:00:00Z To Margenot, recycling dredged sediment as fertilizer makes sense, especially for farmers who already live near lakes. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z The so-called “pollution diet” sets limits in the Chesapeake for nitrogen and phosphorous, as well as sediment. EPA agrees to make Pennsylvania cut Chesapeake Bay pollution 2023-04-20T04:00:00Z Headlamps flashed over damp sediment, illuminating a startling handwritten sign that alerted trespassers of something sinister. An Old Hollywood actor created a treasure map. Could it be real? 2023-04-13T04:00:00Z Curves slow down the flow and allow the river to deposit its sediment on the banks. How 'rewiggling' Swindale Beck brought its fish back 2023-04-24T04:00:00Z Based on the age of the sediment layers surrounding the fossils, researchers estimate the bats to be around 53 million years old, making them the oldest bat fossils on record. Oldest known bat skeletons shed light on early mammalian flight 2023-04-11T04:00:00Z Kiani says even if sediment recycling isn’t economically feasible right now, world events could change that. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z Scientists targeted Jezero for Perseverance because, on our planet, sprawling river systems like that found in the Martian crater build up enormous deposits of sediments. NASA’s Perseverance Rover May Already Have Evidence of Ancient Martian Life 2023-04-05T04:00:00Z Humans share in the watery bounty, because the rocks and sediment washing down Topanga Creek replenish an eroding beach and bolster a beloved surfing spot. Here's where California's remarkably wet year is bringing welcome recovery 2023-04-01T04:00:00Z When refugees from the Italian mainland first settled on the mud flats and islets here in the fifth century, they built foundations with wooden piles in the sediment. Venice Is Saved! Woe Is Venice. 2023-04-01T04:00:00Z Mazon Creek, renowned for its wealth of fossils, formed as an ancient river spewed sediment into a shallow sea. News at a glance: A particle’s weighty measurement, Marburg in Africa, and a fossil called “the blob” 2023-03-29T04:00:00Z Using dredged lake sediment may become comparatively cheap if these traditional fertilizer sources get too expensive, Kiani notes. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z The same might hold true for Mars, meaning Jezero’s sediments could conceivably harbor biological remains. NASA’s Perseverance Rover May Already Have Evidence of Ancient Martian Life 2023-04-05T04:00:00Z Geological Survey of how sediment will move, and what effect that could have on streamside vegetation and the downstream estuary. Klamath countdown: Researchers hustle before largest dam-removal project begins 2023-03-29T04:00:00Z Analysis of the sediment so far shows that the most concentrated layer of DDT is only about 6 centimeters deep — raising questions about just how easily these still-potent chemicals could be remobilized. Scientists uncover startling concentrations of pure DDT along seafloor off L.A. coast 2023-03-23T04:00:00Z Once applied to the fields near the town of Dunnigan, the water quickly sinks into the soil and makes its way through sediment to the aquifer. Amid soaking storms, California turns to farmland to funnel water into depleted aquifers 2023-03-21T04:00:00Z But with lots of nutrients and low levels of heavy metals and other contaminants, the researchers say these lake sediments still hold some promise for crop production. Dredged lake sediment could nourish new crops 2023-05-02T04:00:00Z First, the climate upheaval triggered by impacts as big as Garvin claims should have left its mark in ice cores or ocean or lake sediments. Earth at higher risk of big asteroid strike, satellite data suggest 2023-03-19T04:00:00Z There are no jetties to sweep out the piling sediments, or buoys to mark a channel through the breakers. Crossing the perilous Willapa Bay bar holds a steep cost 2023-03-19T04:00:00Z Even the “control” samples they tried to collect — as a way to compare what a normal sediment or fish sample farther away from the dumping area might look like — ended up riddled with DDT. Scientists uncover startling concentrations of pure DDT along seafloor off L.A. coast 2023-03-23T04:00:00Z “All the soil near the river is sediment, the materials carried by the river over thousands of years,” said Mehmet Cemal Genes, an associate professor of engineering at Eastern Mediterranean University. Thousands of buildings collapsed in one Turkish city. Thousands more may have to come down 2023-03-17T04:00:00Z The team found that the contaminants in the sediment, including lead and TBT — an endocrine disrupter used to protect ship hulls — accounted for most of the toxicity. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z The lawsuit filed in federal court by community groups, the Alliance of the Southeast and Friends of the Parks, alleges that plans to expand a lakefront dump filled with polluted sediment break national environmental laws. Chicago neighborhood groups sue US Army Corps of Engineers over expansion of a polluted dump 2023-03-15T04:00:00Z They measured a gradual phosphorus decrease in sediment layers from the middle to late Devonian, punctuated by sudden spikes of the mineral with evidence of corresponding oxygen depletion. Tree Roots May Have Set Off a Mass Extinction 2023-03-14T04:00:00Z The county manager, Bobby Outten, acknowledged that several projects to renourish beaches — the process of adding an expanse of new sand, often by dredging sediment offshore — have been undertaken in the Outer Banks. Retreat in Rodanthe The logs hold the plants in place as they take root and grow, eventually breaking down and leaving the established plants and sediment around them in place to stabilize the shoreline. How coconuts protect the Jersey Shore, other eroding coasts 2023-03-12T05:00:00Z The sediment thrown up by the Nord Stream 1 blast contained contaminants that breached the threshold safety level for 15 days, at depths of between 95 and 53 metres. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z The dump is a repository of both polluted and unpolluted sediment that has been dredged from a series of rivers and canals that connect Lake Michigan to the Mississippi River. Chicago neighborhood groups sue US Army Corps of Engineers over expansion of a polluted dump 2023-03-15T04:00:00Z If you have a traditional tank water heater, it builds up sediment over the months. Ask Angi: What property maintenance jobs I shouldn’t skip? 2023-03-10T05:00:00Z Flooding, for instance, can starve the sediment of oxygen, which can kill worms and other animals that live in it. China battles alien marsh grass at unprecedented scale 2023-03-07T05:00:00Z Of the seafood most likely to contain microplastics, Hocevar listed bivalves like oysters as well as those which have high concentrations of sediment, like sea cucumbers. Ocean plastic pollution is filtering up into the fish that we eat 2023-03-08T05:00:00Z And the teams’ calculations of the sediment plume’s dispersion show clearly that the sediment didn’t reach the sea surface. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z In 1984, Illinois passed a law converting the land, submerged in Lake Michigan, into an in-water confined disposal facility where all of the dredged sediment would go. Chicago neighborhood groups sue US Army Corps of Engineers over expansion of a polluted dump 2023-03-15T04:00:00Z After a burst of radiocarbon is created in the atmosphere, it is eventually entombed in sediments at the bottom of the ocean. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z After consulting with Dominion, the county learned that the sediment would block the power lines in the event of an emergency and that the area is in a flood plain, department officials said. Officials ready to let urban runoff swallow a cherished Virginia lake 2023-03-05T05:00:00Z "For example it may be found in the water, soil and sediment." The unsolved mystery of the president who may have been assassinated with arsenic 2023-03-05T05:00:00Z “That explains why, apart from the bubble plume, no visible suspended sediment plume can be seen in satellite images after the event,” Forster adds. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z Environmental groups are seriously concerned about the possible effects of mining, such as disturbing sediments, creating noise pollution and damaging breeding grounds. What is the UN High Seas Treaty and why is it needed? 2023-03-04T05:00:00Z Like quicksand, the thick slurry of sediments was so heavy that Domboski only sank further as he tried to pull himself out. This ghost town is too dangerous for humans because an endless fire burns beneath it 2023-03-04T05:00:00Z “This is why we have the sediment,” C. Greg Carroll, 67, who has lived near the lake since 2004, said at a recent crowded town hall meeting about Lake Accotink’s future. Officials ready to let urban runoff swallow a cherished Virginia lake 2023-03-05T05:00:00Z That’s because it is now possible to extract human DNA from cave sediments rather than searching for bones and teeth. Ancient DNA Reveals History of Hunter-Gatherers in Europe 2023-03-01T05:00:00Z The blasts happened at the end of the cod-spawning season, and the eggs float at depths that the stirred-up sediment reached. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z For instance, we can see signatures of ancient life in the form of microbial mats, which are sheets of dead, fossilized microbes that form in sediment or on the surfaces of rocks. Did evolution occur before life even existed? New study sheds light on how amino acids "evolved" 2023-03-01T05:00:00Z This thin layer of silt, rocks, tiny shells, and other marine deposits gets buried over time, preserving the tsunami’s path between layers of sediment. Ancient Tsunami Detectives Hunt for Long-Lost Cataclysms 2023-03-01T05:00:00Z The community and county had already agreed that the 2019 dredging plan would involve staging most of the sediment in Wakefield Park, where Interstate 495 is a short drive away, Cook said. Officials ready to let urban runoff swallow a cherished Virginia lake 2023-03-05T05:00:00Z "Woody debris and sediment are particular issues for these communities following storms. More than 10,000 people in Tairāwhiti have petitioned for land use to be better managed," Forestry Minister Stuart Nash said. New Zealand to investigate forestry practices, impact 2023-02-23T05:00:00Z Sanderson speculates that the physical weight of the sediment could be another problem for the eggs, weighing them down so that they no longer float at the optimal depth to thrive before they hatch. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z “These soft, water-laden sediments make cities and villages uniquely vulnerable to earthquakes,” he said. Why Did a Turkish City Withstand the Quake When Others Crumbled? 2023-02-17T05:00:00Z She and her colleagues dug underneath the boulder to find undisturbed sediment. Ancient Tsunami Detectives Hunt for Long-Lost Cataclysms 2023-03-01T05:00:00Z New plants there could trap the incoming sediment before it ultimately flows downstream into the Potomac River, though not all of it, the department said. Officials ready to let urban runoff swallow a cherished Virginia lake 2023-03-05T05:00:00Z The New Zealand government said the two month inquiry will make past and current land-use practices and the impact of woody debris - including forestry slash and sediment - on communities, livestock, buildings and the environment. New Zealand to investigate forestry practices, impact 2023-02-23T05:00:00Z Sanderson says that the team’s research shows that sediment content needs to be addressed alongside any activity that stirs up the sea bed — such as installing pipelines or wind turbines, or fishing. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z He believes hydrogen created in those rocks may be migrating up and toward shore through porous sediments—perhaps explaining why Carolina bays are found all along the East Coast. Hidden hydrogen: Earth may hold vast stores of a renewable, carbon-free fuel 2023-02-15T05:00:00Z Near the grounding line, video from the robot shows an underside of the ice that is dark and grainy because seafloor mud and sediment is frozen into it. Warming seas are carving into glacier that could trigger sea level rise 2023-02-15T05:00:00Z The cost of any additional stream repair work downstream required because of that escaping sediment would be “nowhere near” the cost of dredging, said Smith, the wetland projects manager. Officials ready to let urban runoff swallow a cherished Virginia lake 2023-03-05T05:00:00Z “In the background is like all these sparkling stars that are like rocks and sediment and things that were picked up from the glacier,” Schmidt said. Skinny robot documents forces eroding Doomsday Glacier 2023-02-15T05:00:00Z Beneath the dramatic sight of bubbles belching from the sea, the explosions also threw up sediment from the sea bed, returning it to the water column. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z Minister Plibersek's department agreed, finding sediment and run off from the open-cut mine was likely to damage the Reef and local water resources. Australia blocks coal mine to protect Great Barrier Reef 2023-02-08T05:00:00Z Analyzing lake sediments, the researchers found evidence of a peak in lead pollution around 6,000 years ago during the Archaic period. Native Americans Conducted Large-Scale Copper Mining 6,000 Years Ago 2023-02-06T05:00:00Z “That’s a different story than what it would look like if, in fact, it just became overrun as an uncontrolled sediment dump,” he said. Officials ready to let urban runoff swallow a cherished Virginia lake 2023-03-05T05:00:00Z It gives GSI the authority to acquire any material of geological significance, including sediments, rocks, minerals, meteorites, and fossils, as well as sites of geological importance, and to control who has access to them. India’s draft geoheritage law sends tremors through the research community 2023-02-01T05:00:00Z Their models showed that the explosions, which happened at about 70 metres deep, threw up a total of 250,000 tonnes of sediment, which reached up to 30 metres below sea level. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z Some form when a creature is entombed in sediment: Water percolates through, flush with minerals, and over time the mixture infiltrates the bones, where it settles and forms stone. Why I Hunt for Sidewalk Fossils 2023-01-31T05:00:00Z “Yet that lake sediment indicates that during the Archaic period, they mined to such a degree that we can detect it in the environment.” Native Americans Conducted Large-Scale Copper Mining 6,000 Years Ago 2023-02-06T05:00:00Z All along the river’s banks, giant mounds of dried mud and silt rose taller than houses — sediment that settled in Lake Powell over decades and has been left exposed by the reservoir’s retreating waters. A river guide's view of Lake Powell's decline and the depths of the Colorado River crisis 2023-01-26T05:00:00Z In research spanning seven years, Robuck has looked at PFASs in Gulf of Maine water, sediments, plankton, coastal and offshore seabirds, and humpback whale tissue. Tracing the flow of "forever chemicals" into waterways and wildlife 2023-01-25T05:00:00Z They worked out how much of each contaminant would become bioavailable and calculated a toxicity threshold for the sediment. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z Other fossils are casts, made, for instance, when a shell dissolves and leaves behind a mold that eventually fills with sediment, which hardens into rock. Why I Hunt for Sidewalk Fossils 2023-01-31T05:00:00Z For a recent study in Anthropocene, the researchers examined sediments from two small inland lakes near ancient mines on Lake Superior’s isolated Isle Royale in Michigan. Native Americans Conducted Large-Scale Copper Mining 6,000 Years Ago 2023-02-06T05:00:00Z After encountering the new rapids in the shifting sediment, Weisheit said going farther upstream could be dangerous. A river guide's view of Lake Powell's decline and the depths of the Colorado River crisis 2023-01-26T05:00:00Z Many scientists assumed that oceans would become the ultimate sink for PFASs, with compounds cycling through marine ecosystems and settling into bottom sediments over decades. Tracing the flow of "forever chemicals" into waterways and wildlife 2023-01-25T05:00:00Z “There are high concentrations for a long duration in a large area,” he says of the contaminated sediment. Nord Stream Pipeline Blasts Stirred Up Toxic Sediment 2023-03-17T04:00:00Z The goal is to minimize sediment in streams and remove barriers to fish passage. Creating safe passage for salmon in Washington state | Provided by Washington Forest Protection Association 2023-01-24T05:00:00Z Such sediments are affected by annual changes and thus act a little like tree rings. Native Americans Conducted Large-Scale Copper Mining 6,000 Years Ago 2023-02-06T05:00:00Z A recent federal survey found Lake Powell has lost nearly 6.8% of its water-storing capacity due to the accumulation of sediments in the reservoir bottom since the 1960s. A river guide's view of Lake Powell's decline and the depths of the Colorado River crisis 2023-01-26T05:00:00Z The price tag for removing an estimated 15 million cubic yards of debris and mud from all five reservoirs and hauling it to sediment placement sites across the foothills is about $550 million, Pestrella said. January storms leave L.A. County flood-control dams at risk of overflowing 2023-01-24T05:00:00Z The old, dried trees collected with another local group, Common Ground Relief, are bundled and arranged in a pattern to capture sediment. In a New Orleans ward ravaged by climate change, leaders nurture the next generation The channels “almost immediately filled up with sediment,” he continues. Uncaptured water isn’t wasted. But more could be stored for a non-rainy day 2023-01-23T05:00:00Z The dam on China’s mighty Yellow River was completed in 1960 and has been troubled by sediment buildup. Overflow at China dam sweeps away people; 2 dead, 7 missing 2023-01-22T05:00:00Z The channels’ capacity has been reduced over time by sediment and vegetation, while the volume of runoff they must handle has grown with the “expansion of impervious surfaces” caused by development. Los Angeles County’s Black Residents Are Most at Risk in Major Floods 2023-01-18T05:00:00Z But basins, which can require a lot of land, can also disrupt the natural ecosystem and lead to beaches needing to be replenished by collecting sediment that flows out of the canyons, according to experts. EXPLAINER: Tackling threat of mudslides in soaked California 2023-01-15T05:00:00Z The county completed construction in the fall of a $21-million debris basin, which helps capture sediment, boulders and trees caught in cresting creeks during storms. A perilous paradise: In Montecito, fires, floods and mudflows leave wealthy town in fear 2023-01-13T05:00:00Z “They put in sediment basins to catch the sediment so it wouldn’t go into the channels. Then we started losing sand on the beaches.” Uncaptured water isn’t wasted. But more could be stored for a non-rainy day 2023-01-23T05:00:00Z Year after year, its waters erode and sluice rock away from mountains, liberating precious metals and whisking them to lowlands, where they are deposited among sediments in riverbeds and floodplains. Illegal mining has muddied tropical rivers worldwide 2023-01-11T05:00:00Z Impeding sediment flows along a river can also make upstream regions more prone to flooding and erode downstream habitats. World's dams to lose a quarter of storage capacity by 2050 - UN research 2023-01-11T05:00:00Z But the construction also contributed to sediment buildup, diminishing the river’s capacity to control floods. California’s paradox: Confronting too little water, and too much 2023-01-10T05:00:00Z However, it also said that historical evidence like tree rings, corals and sediment records shows that there have been variations in the frequency and strength of these episodes since the 1400s. What are El Niño and La Niña, and how do they change the weather? 2023-01-10T05:00:00Z But the longer the lake remains dry, the more that crust will erode, exposing more dangerous sediments to the air. Great Salt Lake on track to disappear in five years, scientists warn 2023-01-06T05:00:00Z But the process also draws human miners, especially in the tropics, where homespun operations to extract gold and other riches from river sediments are poisoning waters and drowning aquatic life in sediment. Illegal mining has muddied tropical rivers worldwide 2023-01-11T05:00:00Z Dams built by China on the Mekong river have also disrupted the flow of sediment into downstream countries, transforming the landscape and jeopardising the livelihoods of millions of farmers, according to Reuters research last year. World's dams to lose a quarter of storage capacity by 2050 - UN research 2023-01-11T05:00:00Z They don’t degrade naturally in the environment and move freely in water, unlike contaminants such as PCBs that stick in sediments, Remucal said. Study: Toxic PFAS chemical plume detected in Green Bay 2023-01-03T05:00:00Z Over millions of years, the sediments that bury a given site are compacted and shifted by geological processes before erosion reveals them. It’s Turtles All the Way Down in the Fossil Record 2022-12-26T05:00:00Z That's happened five times over the last half-billion years, which we know through studying Earth's fossil record - with layers upon layers of sediment having buried the remains of animals over time. Extinction crisis puts 1 million species on the brink 2022-12-23T05:00:00Z The work, presented last month at a meeting of the American Geophysical Union, shows levels of suspended sediment have doubled, compared with premining levels, in some 80% of the rivers. Illegal mining has muddied tropical rivers worldwide 2023-01-11T05:00:00Z |
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