Did the Puchezh-Katunki Impact Trigger an Extinction?
作者： József Pálfy
DOI: 10.1007/978-3-662-06423-8_8
关键词: Phanerozoic 、 Extinction 、 Geology 、 Crater lake 、 Paleontology 、 Palynology 、 Impact crater 、 Extinction event
摘要: The 80 km diameter Puchezh-Katunki impact crater is the only one of six largest known Phanerozoic craters that has not been previously considered as a factor in biotic extinction event. age currently regarded Bajocian (Middle Jurassic), on basis palynostratigraphy lake sediments, but there no significant Bajocian. Earlier K-Ar determinations impactites compared with current Jurassic time scale permit either end-Triassic or Early (Pliensbachian-Toarcian) was coeval crater. stratigraphical and paleontological record contains clues suggest an may have occurred at these horizons. needs reevaluation through 40Ar/39Ar dating rocks and/or revision palynology oldest fill. A definitive determination will help constrain impact-kill curve.
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