天气预报 > 自然 > 恐龙化石是怎么形成的
恐龙化石是怎么形成的
更新时间: 2021-03-05 21:40:30  

1、恐龙死后,身体中的软组织因腐烂而消失,骨骼(包括牙齿)等硬体组织沉积在泥沙中,处于隔绝氧气的环境下,经过几千万年甚至上亿年的沉积作用,骨骼完全矿物化而得以保存。

2、此外恐龙生活时的遗迹,如脚印等有时间也可以石化成化石保存下来。

关键词: 恐龙 化石 怎么 形成

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