动物化石,通常是动物死亡后被含水沉淀物迅速掩埋,产生化学反应,然后矿物质加入或有机体被排出,长时间没有腐烂,然后经过地质作用所变成的石头,但这一些石头保留了动物的形状特征。如果这一程序没有发生,有机体会被暂时保留下来,但不会成为化石。
包含已知最古老的动物化石的埃迪卡拉化石组,只含有软体动物。
The Ediacara fossil formation, which contains the oldest known animal fossils, consists exclusively of soft-bodied forms.
动物化石可鉴定的有10个种属,均属于中国东北更新世晚期猛犸象—披毛犀动物群成员。
There are at least 10 species Paleontology fossils, members of Mammuthus-Coelodonta groups in late Pleistocene in northeast of China.
斯普里格认为这是某种类似水母的软体动物化石。
Sprigg interpreted the patterns as the fossil remains of soft-bodied creatures like jellyfish or their relatives.
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