Inquiring into indicators and origin of catastrophic events at stratigraphic boundaries
| Autor: | Xu Dao-Yi, Zhang Qin-Wen |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Extinction event
China Geologic Sediments Geological Phenomena Paleontology Geology Meteoroids Iridium Biological Evolution Minor Planets Meteorite Extraterrestrial life Phanerozoic Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Clay Aluminum Silicates General Environmental Science |
| Zdroj: | Journal of Southeast Asian earth sciences. 13(3-5) |
| ISSN: | 0743-9547 |
| Popis: | Since 1982, numerous indicators of catastrophic eventshave been observed at the main stratigraphic boundaries in China during the Phanerozoic, i.e. Precambrian-Cambrian, Permian-Triassic, Cretaceous-Tertiary as well as Ordovician-Silurian and Devonian-Carboniferous boundaries. These markers are boundary clay layer, microspherules, high Ir anomaly, mass extinction of organisms and impact of meteorite. We support the hypothesis of the extraterrestrial origin of catastrophic events and suggest that the events at different stratigraphic boundaries might be different in features and processes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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