| 单词 | Precambrian |
| 例句 | The landscape had started to change, and here and there amongst the green were slashes of black where the Precambrian rock grafted sharp hills and cut into craggy cliffs. The Marrow Thieves 2017-05-10T00:00:00Z He drifted past saguaros and alkali flats, camped beneath escarpments of naked Precambrian stone. Into the Wild 1996-01-01T00:00:00Z We travelled for ten days before we were ensconced in Precambrian rock and vicious pine. The Marrow Thieves 2017-05-10T00:00:00Z Others divide the Precambrian into two eras, the very ancient Archean and the more recent Proterozoic. A Short History of Nearly Everything 2003-05-06T00:00:00Z Titled "Precambrian Explosion," the sculpture is a large aquarium. Warm spots in Pierre Huyghe's often chilly Conceptualism at LACMA 2014-12-08T05:00:00Z Back in the Precambrian era when I was a neophyte scribbler, publishing houses weren't quite the fortresses they are today and you could almost get by – or rather in – without an agent. And now there's a book out there with your name on it. Imagine that 2011-04-12T11:51:16Z A mountain cabin contains a mock-up mountainous landscape, its Scottish Highland rocks and earthy dust apparently derived from the Precambrian geological period that predates human life. This week's new exhibitions 2012-06-08T23:05:26Z In the chapter separating those two battles, he evaluates the Precambrian grudge match wherein the Rolling Stones found it expedient to fashion themselves as the natural enemies of the Beatles. What do pop music rivalries reveal about the meaning of life? 2016-05-02T04:00:00Z The region was covered by warm, shallow seas back in the Precambrian and Paleozoic eras, which is why we found plenty of fossils in the creek bed. This 414-mile road to the Arctic Ocean is one of the world’s most remote highways 2016-04-07T04:00:00Z Almost a range unto itself, it stood there, a Precambrian megalith thrust from the plain, a word of God made manifest and irrevocable, a reminder somehow of what really mattered. Favorite Place: In Taos, N.M., an Ordinary Field Evokes the Extraordinary 2012-04-06T20:05:28Z 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 This polished cross-section of a fossilized colony of stromatolites dates to the Precambrian Era. Astronomy 2016-10-13T00:00:00Z The Precambrian Period, which was named simply because nothing older than the Cambrian Period had been discovered until then, covers about 90 percent of Earth’s history. Miller & Levine Biology 2018-01-01T00:00:00Z There are much more extensive Precambrian rocks within the Columbia and Rocky Mountains of southeastern B.C. and the southwestern corner of Alberta. Physical Geology 2015-01-01T00:00:00Z The largest of these deposits occur in Precambrian age rocks. An Introduction to Geology 2017-01-01T00:00:00Z Before the Cambrian, there is “no evidence for group behavior” in animals, Dr. Vannier said, because Precambrian life-forms lacked sophisticated nervous systems. Trilobite Fossils Show Conga Line Frozen for 480 Million Years 2019-10-17T04:00:00Z Geologists have barely begun to describe the Precambrian eon, which spans Earth’s first 4bn years. The Anthropocene epoch: have we entered a new phase of planetary history? 2019-05-30T04:00:00Z “The history of Precambrian paleontology is strewn with mistakes and misidentifications.” Did Crawling Critters Leave These Cracks? The Answer Could Rewrite Evolutionary History 2019-02-26T05:00:00Z The section extends from the Saskatchewan-Manitoba border on the left to just east of Winnipeg on the right, and shows the Paleozoic rocks overlain on the rocks of the Precambrian Superior Craton. Physical Geology 2015-01-01T00:00:00Z An example of ancient tidal flat deposits is exposed in the Precambrian strata found in the central part of the Wasatch Mountains of Utah. An Introduction to Geology 2017-01-01T00:00:00Z The latest findings also suggest that the transition between the Cambrian and the Precambrian, which includes the Ediacaran, was just another extinction event in which one animal community replaced another, Brocks says. World's first animal was a pancake-shaped prehistoric ocean dweller 2018-09-19T04:00:00Z We thank P. Hoffman, S. Mertanen and D. Evans for discussions about Precambrian palaeogeography and environmental changes; K. Johnson for technical help with vacuum lines; and O. Melnik for help with programming. Rapid emergence of subaerial landmasses and onset of a modern hydrologic cycle 2.5 billion years ago 2018-05-22T04:00:00Z The rocks of Precambrian North America date back 600 million years. TRAVEL: Learning along the mighty St. Lawrence River 2017-09-10T04:00:00Z The material is alien to the locality where Precambrian rocks dominate. Rock shelter used by speedy early Australians - BBC News 2016-11-02T04:00:00Z The three oldest eons are sometimes collectively referred to as Precambrian time. An Introduction to Geology 2017-01-01T00:00:00Z “There’s little doubt in places that life had begun back then. The problem with the Precambrian here is that all of the Black Hills has been metamorphosed.” Fossil History attracts paleontologists in South Dakota 2016-10-03T04:00:00Z For an ancient sculpture, a piece of Precambrian art, what is ninety million dollars? The Ungraspable Value of the World’s Largest Diamond 2016-06-07T04:00:00Z According to Roger Bradbury, an ecologist at Australia National University, if reefs were to disappear, the seas would look much as they did in Precambrian times, before fish had evolved. A Radical Attempt to Save the Reefs and Forests 2016-04-18T04:00:00Z Since extant invertebrate deuterostomes use this apparatus for efficient suspension and/or deposit feeding, the early Cambrian or Precambrian deuterostome ancestor probably also shared this lifestyle. Hemichordate genomes and deuterostome origins : Nature : Nature Publishing Group 2015-11-17T05:00:00Z A research team now claims that the tiny fossil pictured above, discovered in southern China and dated to 600 million years ago—clearly during the Precambrian—is the oldest known poriferan. Oldest known sponge pushes back date for key split in animal evolution 2015-03-09T04:00:00Z But there are also tantalizing clues, if no clear proof, of earlier life in South Dakota, from what is called the Precambrian Period. Fossil History attracts paleontologists in South Dakota 2016-10-03T04:00:00Z The team calculates that the oldest rock on Earth — the 550-million- to 4.6-billion-year-old Precambrian continental lithosphere — produces roughly 100 times more gas annually than scientists previously thought. Earth's deep crust could support widespread life 2014-12-16T05:00:00Z “It’s the Precambrian of the satellite era. People always say, ‘There were satellites then?’ Boulder scientists retrieve old sea ice images 2014-09-20T04:00:00Z Advances in geochemical and genetic technologies are partially responsible for the surge of interest in searching for microbial life on Precambrian lands. Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z "This suggests that in the Precambrian low-oxygen ocean, there were very few carnivores," he said. Oxygen Brought Earliest Carnivores to Life 2013-08-01T20:45:02.507Z “I had some stuff that I thought was Precambrian fossil stuff, but I could never convince the paleontologists,” said Jack Redden, a retired geologist from the South Dakota School of Mines & Technology. Fossil History attracts paleontologists in South Dakota 2016-10-03T04:00:00Z But red in tooth and claw the Precambrian was not—for neither teeth nor claws existed. The Cambrian explosion: Kingdom come 2013-03-21T16:02:17Z Molluscs, annelids and numerous smaller phyla typically share stereotyped spiral cleavage patterns, cell-fate assignments and characteristic ciliated trochophore larvae, features that originated in the Precambrian era. Insights into bilaterian evolution from three spiralian genomes 2013-01-23T18:22:45.773Z Furthermore, the Precambrian fossil record shows that early microbiotic organisms adapted to land-based stresses, developing a “lotion” to screen out solar radiation, for example. Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z These are low oxygen zones, where oxygen levels are one to 10 percent of typical levels, the same as in the Precambrian. Oxygen Brought Earliest Carnivores to Life 2013-08-01T20:45:02.507Z As a final consideration, the Assynt crater substantially remodeled the local Precambrian landscape, with evidence that a massive post-impact crater lake formed. Time Is Not Made to Flow in Vain: Eternity and Apocalypse in Assynt and Mars 2012-10-03T17:45:06.937Z "There seems to have been a dramatic improvement in the habitability of the Earth at around the Precambrian–Phanerozoic boundary," Williams said. Alien Life May Not Survive on Planets With Uranus-Like Tilts 2012-02-12T15:15:00.267Z We argue that a detailed understanding of the depositional setting, mineralogy, and geologic history of Precambrian sedimentary rocks indicates that the Fe isotope record dominantly reflects biological fractionations and Fe redox processes. [Technical Comment] Comment on ?Abiotic Pyrite Formation Produces a Large Fe Isotope Fractionation? 2012-02-02T18:55:36.490Z Taken together, the geochemical and microfossil findings support his theory that during the Precambrian eon, complex life forms evolved not only in the oceans, but also on land. Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z “It is possible that most Precambrian evolution of life was actually going on in the nonmarine—lakes, rivers, streams, soils,” he says. Complex Life Hit Freshwater Early 2011-04-18T16:04:00Z It is aptly named, with kilometer-scale folds of Precambrian metamorphic rocks. Scientist at Work: Answering Questions About Antarctica 2011-01-22T16:00:18Z It’s not exactly like TNQ, but it and other samples collected that day are sure to add to the story of hidden Precambrian basement in East Antarctica. Scientist at Work: Unraveling the History Beneath the Ice 2010-12-28T21:28:12Z “Imprinted in the DNA of modern organisms is the history of these Precambrian events,” says Alm. Gene Genesis 2010-12-21T16:14:00Z “He opened up the door for the rest of us to pursue evidence of Precambrian life on land.” Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z These findings are not of Precambrian animals themselves, but of their tracks. Palaeontology: Do the locomotion 2010-03-04T11:17:00Z In the very earliest fossiliferous rocks of all, the Precambrian formation, there are remains of Molluscs, Trilobites and Gigantostraca, similar to those which flourished in Cambrian and Silurian times. Form and Function A Contribution to the History of Animal Morphology Precambrian Jungles Knauth’s evolutionary model goes far beyond debunking continental sterility. Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z The Amber of the Precambrian The Beck Spring formation stretched before us, angular and dusty with few signs of life. Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z Researchers like Strother have begun to find more evidence of Precambrian land fossils. Death Valley's First Life Came by Land, Not by Sea 2014-04-28T20:40:00Z |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。