Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2002918117 |
Calibrating the coevolution of Ediacaran life and environment | |
Alan D. Rooney; Marjorie D. Cantine; Kristin D. Bergmann; Irene Gómez-Pérez; Badar Al Baloushi; Thomas H. Boag; James F. Busch; Erik A. Sperling; Justin V. Strauss | |
2020-07-06 | |
发表期刊 | Proceedings of the National Academy of Science
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出版年 | 2020 |
英文摘要 | The rise of animals occurred during an interval of Earth history that witnessed dynamic marine redox conditions, potentially rapid plate motions, and uniquely large perturbations to global biogeochemical cycles. The largest of these perturbations, the Shuram carbon isotope excursion, has been invoked as a driving mechanism for Ediacaran environmental change, possibly linked with evolutionary innovation or extinction. However, there are a number of controversies surrounding the Shuram, including its timing, duration, and role in the concomitant biological and biogeochemical upheavals. Here we present radioisotopic dates bracketing the Shuram on two separate paleocontinents; our results are consistent with a global and synchronous event between 574.0 ± 4.7 and 567.3 ± 3.0 Ma. These dates support the interpretation that the Shuram is a primary and synchronous event postdating the Gaskiers glaciation. In addition, our Re-Os ages suggest that the appearance of Ediacaran macrofossils in northwestern Canada is identical, within uncertainty, to similar macrofossils from the Conception Group of Newfoundland, highlighting the coeval appearance of macroscopic metazoans across two paleocontinents. Our temporal framework for the terminal Proterozoic is a critical step for testing hypotheses related to extreme carbon isotope excursions and their role in the evolution of complex life. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/282728 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Alan D. Rooney,Marjorie D. Cantine,Kristin D. Bergmann,et al. Calibrating the coevolution of Ediacaran life and environment[J]. Proceedings of the National Academy of Science,2020. |
APA | Alan D. Rooney.,Marjorie D. Cantine.,Kristin D. Bergmann.,Irene Gómez-Pérez.,Badar Al Baloushi.,...&Justin V. Strauss.(2020).Calibrating the coevolution of Ediacaran life and environment.Proceedings of the National Academy of Science. |
MLA | Alan D. Rooney,et al."Calibrating the coevolution of Ediacaran life and environment".Proceedings of the National Academy of Science (2020). |
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