| 单词 | Permian period |
| 例句 | Calder estimates that the fossil is from the end of the Carboniferous period and into the Permian period. Woman on beach finds fossil from unknown animal likely older than dinosaurs 2022-09-02T04:00:00Z A massive buildup of carbon dioxide in the atmosphere 250 million years ago, during the Permian period, led to the Great Dying, when most life on Earth was wiped out. Our Fragile Earth: How Close Are We to Climate Catastrophe? 2023-09-26T04:00:00Z Following the wet Mississippian and Pennsylvanian periods, which were dominated by giant fern trees, the Permian period was dry. Fundamentals of Biology 2015-01-01T00:00:00Z For example, at the end of the Permian period 256 million years ago, rising ocean temperatures and an 80% plunge in oxygen levels helped drive the largest extinction in Earth’s history. Breathless oceans: Warming waters could suffocate marine life and disrupt fisheries 2023-02-01T05:00:00Z Scientists estimate that approximately 70 percent of the terrestrial plant and animal species and 84 percent of marine species became extinct, vanishing forever near the end of the Permian period. Biology for AP Courses 2022-06-09T00:00:00Z The human-caused warming Earth faces in the foreseeable future isn’t yet as extreme as the temperature swings of the Permian period. Rampant wildfires once led to global mass extinction, scientist say. Can it happen again? 2022-07-05T04:00:00Z They have also resulted in mass extinctions, including at the end of the Permian period, about 250 million years ago, when around 90 percent of Earth’s species vanished. Review | With failed experiments and bizarre successes, evolution marches on 2021-12-09T05:00:00Z Trilobites disappeared from the fossil record during the mass extinction at the end of the Permian period, 252 million years ago.Credit: Supercomputer scours fossil record for Earth’s hidden extinctions 2020-01-15T05:00:00Z An exposed section of this layer, which separates shale from the Permian period from Triassic limestone above it, is in danger from a road-widening project, Tripathi says. India’s geologists champion law to protect fossil treasures 2019-08-04T04:00:00Z Collecting fossils from rock layers deposited prior to the Permian period that contain some early vertebrate bones. Biology for AP Courses 2022-06-09T00:00:00Z Only after around 251 million years ago, at the end of the Permian period, did they start to evolve different styles of locomotion that helped them enter new ecological niches available to them on land. RoboFossil Reveals Locomotion of Beast from Deep Time 2019-01-17T05:00:00Z When they used the model to mimic conditions at the end of the Permian period, they found it matched the extinction records. The 'great dying': rapid warming caused largest extinction event ever, report says 2018-12-06T05:00:00Z It took a supercomputer more than six months to simulate all the changes the volcanic eruptions are suspected of causing during the Permian period. Global warming today mirrors conditions during Earth’s largest extinction event: UW study 2018-12-06T05:00:00Z Genetic evidence suggests the order originated in the Permian period, more than 250 million years ago. Scientists finally find the 240-million-year-old ‘mother of all lizards’ 2018-05-30T04:00:00Z Burger’s samples painted a grim picture of Earth’s environment at the end of the Permian period. Burning coal may have caused Earth’s worst mass extinction | Dana Nuccitelli 2018-03-12T04:00:00Z Earth’s most severe mass extinction, the “Great Dying,” began 251.94 million years ago at the end of the Permian period, with the loss of more than 90% of marine species. Underground magma triggered Earth’s worst mass extinction with greenhouse gases | Howard Lee 2017-08-01T04:00:00Z The extinction in question happened at the end of the Permian period, 251.9m years ago, according to many independent datings of oceanic rocks from the time. Layers of meaning 2015-10-01T04:00:00Z To run their model, researchers pumped volcanic greenhouse gases into their simulation to match temperature conditions at the end of the Permian period. Global warming today mirrors conditions during Earth’s largest extinction event: UW study 2018-12-06T05:00:00Z Their proposal would elevate the Capitanian, which occurred during the Middle Permian period, to sit alongside the so-called "Big Five" mass extinctions. New mass extinction event proposed by geologists 2015-04-21T04:00:00Z However, Burger did find high levels of mercury and lead in his samples, coinciding with the end of the Permian period. Burning coal may have caused Earth’s worst mass extinction | Dana Nuccitelli 2018-03-12T04:00:00Z Many scientists think that a similar massive burst of volcanic activity in Siberia touched off the biggest extinction of all time, just 8 million years later, at the end of the Permian period. Sixth extinction, rivaling that of the dinosaurs, should join the big five, scientists say 2015-04-16T04:00:00Z The work, published in Science1, is the latest to try to pinpoint the causes of the 'Great Dying', at the end of the Permian period. Acidic oceans linked to greatest extinction ever 2015-04-08T04:00:00Z To measure how rising temperatures and less oxygen would affect animal species of the Permian period, the researchers used 61 modern creatures — crustaceans, fish, shellfish, corals and sharks. Global warming today mirrors conditions during Earth’s largest extinction event: UW study 2018-12-06T05:00:00Z The team's destination was the Kapp Starostin Formation, a series of rock layers that are more than 400 meters thick in some locations and which span about 27 million years of the Permian period. New mass extinction event proposed by geologists 2015-04-21T04:00:00Z At the end of the Permian period, about 252 million years ago, animals started dying at ferocious rates. The Largest Extinction in Earth’s History May Have Been Caused by Microbes 2014-07-06T04:00:00Z The record then skips tens of millions of years into rocks from the Permian period that preceded the Triassic. Geologists take drill to Triassic park 2013-10-02T17:20:26.080Z But evidence is accumulating that the biggest extinction of all, 252.3m years back, at the end of the Permian period, was indeed also triggered by an impact. Mass extinctions: Small but deadly 2013-07-25T14:59:45Z Sandwiched between the coal layers of an open-pit coal mine in the Wuda basin in Inner Mongolia is the imprint of a lush forest from the Early Permian period. Primeval Land Rises From the Ashes 2012-05-10T19:19:37Z Both are known exclusively from areas in the Northern Hemisphere during the Permian period, so finding one south of the paleo-equator would be an important discovery. Scientist at Work Blog: A Promising Skeleton in the Quarry 2012-05-02T18:57:09Z Martha Richter works at the Natural History Museum in London, and she specializes in fossil sharks and bony fish from the Permian period. Scientist at Work Blog: From Brazil's Book of Rocks 2012-04-17T21:33:00Z They date from the Permian period of earth history, a time when synapsids were some of the dominant animals on land. Scientist at Work Blog: How Old is the 'Fire Stone'? 2012-04-13T19:27:53Z It was deposited 250 million years ago in the Permian period, when the seas receded from the shore of the ancient continent Pangea. Nuke Us: Meet The Town That Wants America's Worst Nuclear Waste 2012-01-25T23:04:09Z Each sampling site spanned the mass extinction 252 million years ago at the end of the Permian period. Eruptions Swept Life From Land and Sea 2011-11-17T20:07:24Z I. The first problem, the localization of the ice sheets, arises from the fact that in both the Pleistocene and the Permian periods glaciation was remarkably limited. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Among others, the Permian period abruptly ended 250 million years ago. Ocean life on the brink of mass extinctions: study 2011-06-21T09:50:26Z This was the end of the Permian period, and of the era of life called the Palaeozoic. How life recovers from mass extinctions: Dead-ammonite bounce 2010-07-05T07:48:00Z In the Permian period the warm moist climate of most of the Carboniferous period was replaced by severe conditions, culminating in an Ice Age which spread from the Southern Hemisphere throughout the world. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told The author shows that India has been a continent with enormous fresh-water lakes from the Permian period to the present day. Alfred Russel Wallace: Letters and Reminiscences, Vol. 1 Then comes the Permian period, named, again, from local circumstances, the first investigation of its deposits having taken place in the province of Permia in Russia. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky The Permian period — General succession, characters, and mode of formation of the Permian deposits — Life of the period — Plants — Protozoa — Corals — Echinoderms — Annelides — Crustaceans — Polyzoa — Brachiopods — Bivalves — Univalves — Pteropods — Cephalopods — Fishes — Amphibians — Reptiles — Literature. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science Then comes the Permian period, named, again, from local circumstances, the first investigation of its deposits having taken place in the province of Permia, in Russia. The Atlantic Monthly, Volume 11, No. 65, March, 1863 In the Permian period reptiles appeared, or perhaps one should say, began to assert themselves. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told The Amphibians are followed in the Permian period by the first Amniota, the oldest reptiles; from these develop later, in the Triassic period, the Birds on the one hand, and the Mammals on the other. Monism as Connecting Religion and Science A Man of Science We find well-preserved remains of them in the Permian period. The Evolution of Man — Volume 2 The Conifers of the Permian period are numerous, and belong in part to Carboniferous genera. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science The author shows that India has been a continent with enormous fresh-water lakes, from the Permian period to the present day. More Letters of Charles Darwin — Volume 2 Unfortunately, if the Permian period is an age of death, it is not an age of burials. The Story of Evolution The Amphibians of the Permian period belong principally to the order of the Labyrinthodonts, which commenced to be represented in the Carboniferous, and has a large development in the Trias. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science It is very probable that some part of the Permian period was the age of the origin of the Protamniotes. The Evolution of Man — Volume 2 Amongst Vertebrates, we meet in the Permian period not only with the remains of Fishes and Amphibians, but also, for the first time, with true Reptiles. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science The vast upheaval of nearly all parts of the land during the Permian period would naturally lead to a far more vigorous scouring of its surface by the rains and rivers. The Story of Evolution We find both these groups, in patriarchal forms, in Europe, North America, and South Africa during the Permian period. The Story of Evolution They had appeared, as we said, in the Permian period. The Story of Evolution Hence Hatteria is the phylogenetically oldest of all living reptiles, an isolated survivor from the Permian period, closely resembling the common ancestor of the Amniotes. The Evolution of Man — Volume 2 They commence their existence, so far as known, in the Devonian period, but they attain their maximum in the Carboniferous; and—unlike the Lepidodendroids—they are not known to occur in the Permian period. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science But we need not, and must not, imagine a period of cold as severe, prolonged, and general as that of the Permian period. The Story of Evolution As these conditions advance in the Permian period, the forests wither and shrink. The Story of Evolution |
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