Comparison of the Cretaceous-Tertiary Boundary Impact Events and the 0.77-MaAustralasian Tektite Event: Relevance to Mass Extinction

摘要

Cretaceous-Tertiary (K-T) boundary sections provide records of events of the K-Ttransition: retreat of the Cretaceous marine sea that left continents dotted with peat swamps, and impacts that left craters on exposed land and the ocean floor. In order to best understand the K-T boundary record, geologic, geochemical, and petrographic data obtained from the study of tektites and three impact craters are reviewed and compared in the study.