Analyses of shocked quartz from the K-P boundary
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The precise cause and timing of the Cretaceous-Paleocene (K-P) mass extinction 65 Ma ago remains a matter of debate. Many advocate that the extinction was caused by a meteorite...
6500万年前发生的白垩纪-古近纪（Cretaceous-Paleocene, K-P）大灭绝事件，其确切成因与发生时间至今仍存在争议。诸多学者认为此次大灭绝系一颗陨石撞击所引发……
