研究发现白垩纪海洋是“乌贼的天下”
#地球
以往观点认为 1亿至7000万年前的白垩纪后期海洋生物以菊石和鱼类为主，但日本研究团队发现当时的海洋实际上是“乌贼的天下”。由于乌贼没有外壳和骨骼，作为化石很难被发现，此前从未被纳入白垩纪海洋的生态图景。研究团队开发出新技术，将岩石以百分之一毫米精度逐层切削拍摄、数字化立体重现内部包括微小化石在内的所有化石。从北海道各地的白垩纪岩石中鉴定出263个乌贼喙部硬组织化石，平均尺寸约为4毫米。
共同：日本团队研究发现白垩纪海洋是“乌贼的天下”
BY Solidot 纯净版
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