气候变化领域集成服务门户(CCPortal): Impact ejecta at the Paleocene-Eocene boundary

CCPortal

DOI	10.1126/science.aaf5466
	Impact ejecta at the Paleocene-Eocene boundary
	Schaller M.F.; Fung M.K.; Wright J.D.; Katz M.E.; Kent D.V.
发表日期	2016
ISSN	0036-8075
起始页码	225
结束页码	229
卷号	354 期号:6309
英文摘要	Extraterrestrial impacts have left a substantial imprint on the climate and evolutionary history of Earth. A rapid carbon cycle perturbation and global warming event about 56 million years ago at the Paleocene-Eocene (P-E) boundary (the Paleocene-Eocene Thermal Maximum) was accompanied by rapid expansions of mammals and terrestrial plants and extinctions of deep-sea benthic organisms. Here, we report the discovery of silicate glass spherules in a discrete stratigraphic layer from three marine P-E boundary sections on the Atlantic margin. Distinct characteristics identify the spherules as microtektites and microkrystites, indicating that an extraterrestrial impact occurred during the carbon isotope excursion at the P-E boundary. © 2016, American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon; glass; silicon dioxide; glass; silicate; Atlantic Ocean; carbon cycle; carbon isotope; deep-sea benthos; Eocene; expansion; extinction; extraterrestrial matter; global warming; Hypsithermal; Paleocene; Paleocene-Eocene boundary; tektite; Article; chemical analysis; chemical composition; chemical structure; climate change; crystal structure; crystallization; environmental impact; environmental parameters; Eocene; geography; high temperature; marine environment; Paleocene; physical chemistry; priority journal; stratigraphy; animal; astronomy; Atlantic Ocean; carbon cycle; climate; evolution; greenhouse effect; plant; species extinction; Atlantic Ocean; Mammalia; Animals; Atlantic Ocean; Biological Evolution; Carbon Cycle; Carbon Isotopes; Climate; Earth (Planet); Extinction, Biological; Glass; Global Warming; Plants; Silicates
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245354
作者单位	Earth and Environmental Sciences, Rensselaer Polytechnic Institute (RPI), Troy, NY 12180, United States; Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, NY 10964, United States
推荐引用方式 GB/T 7714	Schaller M.F.,Fung M.K.,Wright J.D.,et al. Impact ejecta at the Paleocene-Eocene boundary[J],2016,354(6309).
APA	Schaller M.F.,Fung M.K.,Wright J.D.,Katz M.E.,&Kent D.V..(2016).Impact ejecta at the Paleocene-Eocene boundary.Science,354(6309).
MLA	Schaller M.F.,et al."Impact ejecta at the Paleocene-Eocene boundary".Science 354.6309(2016).