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白垩系和第三系(K/T)界线时期发生了显生宙最后一次大规模的生物绝灭和劫后复苏.自Alvarez等人[1]根据K/T界线的Ir异常提出生物大绝灭的小行星撞击假说后,K/T界线的精确时代、重大地质事件和生物大灭绝及其内在联系一直受到国际学术界的极大关注.K/T界限时期(约65Ma)的冲击石英
The last large-scale biological extinction and post-robotic recovery of the Phanerozoic took place during the Cretaceous and Tertiary (K / T) delineations. Since Alvarez et al. [1] proposed a biomajor based on the Ir anomaly at the K / T boundary Precise time of K / T boundary, major geological events and mass extinction and its internal relations have been greatly concerned by the international academic community after the asteroid impact hypothesis of K / T was hit.The impact quartz in K / T boundary period (about 65Ma)