古-中生代之交生物灭绝是显生宙以来生态系遭受最具重创的一次生物大灭绝事件(P-T事件),其诱发机制可能与泛大陆聚合、核幔圈层变动以及地幔柱有关。P-T事件后,全球古环境、古气候发生急剧变化,早三叠世生态系统以低分异度的广适性分子和机会分子为主,通过对纹层状和薄层状灰岩、条带状灰岩、扁平砾石灰岩、微生物岩、蠕虫状灰岩、潮下皱纹构造以及海底碳酸盐胶结岩扇等错时相现象进行详细论述。表明生物大灭绝后错时相沉积及构造的出现是古-中生代之交全球异常海洋生态环境的自然响应,它们在华南地区广泛发育,为研究和认识PTB灭绝后的全球环境变化以及生物灭绝-复苏提供了重要依据。 Paleozoic - Biotic extinction of the Mesozoic was the most traumatic event of a mass extinction (P-T event) in the ecosystem since the Phanerozoic. The mechanism of its induction may be related to the aggregation of the continental margin, the change of the mantle and the mantle plume. After the PT event, the global paleoenvironment and paleoclimate changed dramatically. The Early Triassic ecosystems mainly consisted of low-diversity broadly-adapted molecules and opportunistic molecules. By laminating and laminating limestone, Like limestone, flat gravel limestone, microbial rock, vermicular limestone, subtidal crustal structure and submarine carbonate cementation fan. The results show that the occurrence and occurrence of the wrong phase facies after the mass extinction are the natural responses of the global anomalous marine ecological environment at the turn of the Paleozoic Mesozoic. They are widely developed in southern China. In order to study and understand the global environmental changes after extinction of PTB and the biological extinction-recovery Provide an important basis.