| 单词 | alluvial fan |
| 例句 | It’s a desolate alluvial fan on the southern flanks of the Cady Mountains, where sparkling calcite crystals and pieces of quartz, jasper and agate are continually carried down the slopes by thunderstorms and flash floods. Rockhounds fight for access to their jewel in the desert: Mojave Trails National Monument 2023-07-16T04:00:00Z In a new study, scientists have for the first time produced a detailed map of one of these paleovalleys, located on the Kings River alluvial fan between Fresno and Selma. From the air, scientists map 'fast paths' for recharging California's groundwater 2022-11-18T05:00:00Z Perched on a broad alluvial fan dotted with rabbitbrush and Joshua trees, this ragtag community of artists, misanthropes and urban refugees has little time for politicians. Exploring the riddle of California's 450-mile-long 3rd Congressional District 2022-11-03T04:00:00Z According to the California Department of Water Resources, the state experiences many types of flooding, including alluvial fan, riverine, coastal, flash, and localized floods, as well as debris flows and tsunamis. With Tropical Storm Kay arriving, here's how to check your flood risk 2022-09-09T04:00:00Z Summer storms in Death Valley are usually more localized, closing a road or two and maybe causing an alluvial fan to flash flood, Jurado said, calling Friday’s downpour “exceptionally rare.” Destructive rain in Death Valley and flooded Vegas casinos mark a summer of extreme weather 2022-08-06T04:00:00Z Breccias typically form where the particles are not transported a significant distance in water, such as alluvial fans and talus slopes. Physical Geology 2015-01-01T00:00:00Z The submarine fan is formed by a network of turbidites that deposit their sediment loads as the slope decreases, much like what happens above-water at alluvial fans and deltas. An Introduction to Geology 2017-01-01T00:00:00Z As you approach Carkeek Park, Pipers Creek empties into the Sound, creating an alluvial fan of little streams and trickles and sand formations. This hidden beach links Golden Gardens and Carkeek Park, only emerges at low tide and makes for a special, quiet walk 2021-05-28T04:00:00Z After the forests disappeared, rain fell on deforested highlands, gradually eroding sediments to form large triangle-shaped deposits called alluvial fans. People May Have Used Fire to Clear Forests More Than 80,000 Years Ago 2021-05-05T04:00:00Z Framed by volcanic peaks, rock towers and sagebrush-studded alluvial fans, the area is the very definition of “remote.” When rare California toads get thirsty for love, this tiny college helps set the mood 2021-04-08T04:00:00Z Over the next few centuries, this creek will seek to become graded again by eroding down through its own alluvial fan. Physical Geology 2015-01-01T00:00:00Z An alluvial fan spreads out into a broad alluvial plain. An Introduction to Geology 2017-01-01T00:00:00Z Seward is located in an alluvial fan in which gravel and sediment constantly accumulate in waterways while flowing down from higher altitudes. Seward area hit by severe flooding due to heavy rain, winds 2020-10-05T04:00:00Z Although the shaking was less intense, Trona’s location on soft sediments that have eroded off a mountainside — known as an alluvial fan — caused the ground to act like quicksand, O’Dell said. Ridgecrest earthquake mystery: Why so little destruction from huge temblors? 2019-07-10T04:00:00Z So I find it both funny and ironic that we are here in Southern California passing an enormous wash, an alluvial fan that catches the runoff from Mt. Why did Jonathan Lethem turn toward the desert in 'The Feral Detective'? - Los Angeles Times 2018-11-01T04:00:00Z A man stands on an alluvial fan below Tumacacori mountain, a few dozen miles north of here. Life and death on the Mexican border 2017-03-01T05:00:00Z The most distinctive alluvial sedimentary deposit is the alluvial fan, a large cone of sediment formed by streams flowing out of dry mountain valleys into a wider and more open dry area. An Introduction to Geology 2017-01-01T00:00:00Z A vast alluvial fan blossoms across the desolate landscape of the Taklimakan Desert in China's Xinjiang Province. 10 Stunning Pictures from NASA's Release of 3 Million Images 2016-04-06T04:00:00Z Its surface is stamped with depressions that indicate the long-ago existence of oceans and seas, as well as rivers that end in alluvial fans, where ancient sediment was once deposited. Here's What Killed Mars 2015-11-05T05:00:00Z This flat feature may be the remains of an ancient delta or an alluvial fan. Europeans pick site for ExoMars 2018 rover 2015-10-21T04:00:00Z In contrast, the geological record of Mars shows clearly that it once had flowing water, even in major rivers and streams that could round pebbles and form alluvial fans. Life Ain't Easy: What Would Make an Exoplanet "Earth-Like"? [Excerpt] 2015-04-30T04:00:00Z As distributary channels fill with sediment, the stream is diverted laterally, and the alluvial fan develops into a cone shape with distributaries radiating from the canyon mouth. An Introduction to Geology 2017-01-01T00:00:00Z A vast alluvial fan blossoms across the desolate landscape of the Taklimakan Desert in China's Xinjiang Province. 10 Stunning Pictures from NASA's Release of 3 Million Images 2016-04-06T04:00:00Z An alluvial fan takes a jellyfish shape in the Gobi Desert. China's first high-resolution satellite captured these 10 incredible images 2014-08-25T04:00:00Z For example, the latest Gulf of Mexico dead zone map highlights some very high-productivity commercial fishing regions around the Atchafalaya river delta alluvial fan: Have There Ever Been Attempts To Oxygenate Ocean Waters Considered Dead Zones? 2013-12-12T15:34:00Z The current interpretation is that the rover is sitting at the head of an alluvial fan of material that washed down through the crater wall and across the plain, cutting many individual streams. Mars images 'show old streambed' 2012-09-27T19:15:21Z A delta-shaped ground formation known as an alluvial fan even reveals how the water flowed. Martian Find: Signs of an Ancient, Rushing Stream 2012-09-28T17:35:33Z A vast alluvial fan blossoms across the desolate landscape of the Taklimakan Desert in China's Xinjiang Province. 10 Stunning Pictures from NASA's Release of 3 Million Images 2016-04-06T04:00:00Z The scarp marks the edge of materials deposited at the foot of an alluvial fan, a sedimentary feature left behind from floods that once spilled down from the rim of Gale Crater. Mars scientists await feast of data 2012-08-15T17:20:52.890Z The feature, called an alluvial fan, is thought to have been formed by water that swept sediments over the lip of the basin. Mars rover sizes up the field 2012-08-08T17:20:21.963Z Where we've landed in the ellipse, at a large scale from orbit, looks fairly familiar—it's a feature we call an alluvial fan. Ready to Rove: Curiosity Project Scientist Lays Out Mars Tour Plans 2012-08-07T15:15:03.750Z The stream was probably fed by a channel in the alluvial fan that the investigators have named Peace Vallis. Martian Find: Signs of an Ancient, Rushing Stream 2012-09-28T17:35:33Z Here it becomes piled and massed together, till the pressure of accumulation forces it out into the main valleys, where it spreads in alluvial fans and silts up the plains. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z Under such circumstances, each heavily loaded stream coming out from beneath the ice must have tended to develop a plain of stratified material near its point of issue—a sort of alluvial fan. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z There are stony wastes, or alluvial fans, where mountain streams emerge upon the plains, in time of flood, bringing detritus in their torrential courses from the mountain canyons and depositing it along the mountain base. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 4 "Grasshopper" to "Greek Language" 2011-11-28T03:00:19.517Z For example, in teaching the meaning of alluvial fans in geography, a teacher might seek to awaken the interpreting ideas by merely stating in words the characteristic of a fan. Ontario Normal School Manuals: Science of Education Page 283 Half an hour's walk brought us to Vista Alegre, another little clearing on an alluvial fan in the bend of the river. Inca Land Explorations in the Highlands of Peru The enemy's position consisted of a line of sangars blocking the roads from the river up to the alluvial fan on which they were placed. With Kelly to Chitral Where rivers descend from a mountainous region upon the plain they may build alluvial fans of exceedingly gentle slope. The Elements of Geology We emerged from the thickets near a promontory where there was a fine view down the valley and particularly of a heavily wooded alluvial fan just below us. Inca Land Explorations in the Highlands of Peru Undoubtedly this alluvial fan had been highly prized in this country of terribly steep hills. Inca Land Explorations in the Highlands of Peru Owing to the scarcity of arable land he was obliged to cultivate such pampas as he could find—one an alluvial fan near his house, another a natural terrace near the river. Inca Land Explorations in the Highlands of Peru From alluvial fans and flood plains they are constantly being taken up and swept farther on downstream. The Elements of Geology Deltas and alluvial fans have many common characteristics. The Elements of Geology |
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