如果把地球古代各个时期形成的沉积岩层看成是一本书的书页,那么,保存在岩层中的各种生物化石就是其中的文字,这样化石和地层就组成了记载地球演化和生物进化历史的“万卷书”。然而,由于古代生物成为化石的条件非常苛刻,即生物要有硬体、其遗体必须被快速埋藏以及必须经过漫 If we consider the sedimentary formations formed in the ancient times of the earth as the pages of a book, then the various fossils preserved in the rock are the texts, so that the fossils and strata form a record of the evolutionary and evolutionary history of the earth “Volumes of books.” However, due to the very harsh conditions that ancient creatures became fossilized, that is, creatures need to have hardware, their remains must be quickly buried and must pass through