What happened at Precambrian-Cambrian boundary

What happened at Precambrian-Cambrian boundary

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摘要 The Precambrian-Cambrian boundary represents one of the most puzzling and intriguing transitions in Earth history. One of the former hypotheses put forward an evolutional mechanism after a bolide impact, which is still uncertain. Anyhow, biological and geological studies seem to be favorable to an impact. Three most important elements were discovered and thus shed light upon the issue. The Precambrian-Cambrian boundary represents one of the most puzzling and intriguing transitions in Earth history. One of the former hypotheses put forward an evolutional mechanism after a bolide impact, which is still uncertain. Anyhow, biological and geological studies seem to be favorable to an impact. Three most important elements were discovered and thus shed light upon the issue.

作者 Weijia Zhang1a Xiaodong Zou1b Hangjie Yu2 Yang Lei1a(1a.Department ofPhysics and Astronomy, PekingUniversity, Beijing 100871 1b.Research Institute of Paleontology, Peking University, Beijing 100871 2.School of Physics, Sun Yat-sen University, Zhuhai, Guangdong 510275)

出处《科技风》 2010年第11期267-,共1页

关键词 Impact crater iridium anomaly negative C13 excursion Impact crater, iridium anomaly, negative C13 excursion

分类号 P5 [天文地球—地质学]

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What happened at Precambrian-Cambrian boundary

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