Given these factors, some areas have become a treasury of well-preserved ichthyosaur fossils.The deposits at Holzmaden, Germany, present an interesting case for analysis.

  • 但是它 们的石化需要一系列因素:软组织的腐烂速度缓慢,很少被其他动物残食,缺少混杂、冲走 小骨头的快速水流和波浪,以及相当快地被掩埋。
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