Not only most metazoan phyla made their debut at the earliest Cambrian, but also the fossil record like calcareous metaphyte flora and acritarch change dramatically nearly at the same time.
地球外部圈层
演替
，诸如大陆重组、地磁极移、古
候、大洋地球学性质以
大
量等在时间上与这一生命爆发事件有耦合关系。
观点；若发现问题，欢迎向我们指正。
