trace fossil

常见例句

Mammal-like fossil in Late Paleozoic and trace fossil in Mesozoic around Fengmenkou area have the significance of global correlation.
封门口一带的晚古生代似哺乳类动物化石和中生代的遗迹化石等具有世界对比意义。
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The ichnofacies is the grouping of characteristic trace fossil association tending to rscirrence through a rather long interval of geologic time, and their environmental implication.
遗迹相是指一组具有特征的遗迹化石组合，在一段相当长的地质时期中不断的重视以及它们的环境意义。
Dr. Tattersall believes the leap to humans may have been brought about very suddenly, perhaps by a few critical genetic changes, which is why the transition is so hard to trace in the fossil record.
塔特萨尔博士认为，转变到人类的飞跃产生已经很突然，或许由于几个重要的基因变化。这就是为什么这个转变在化石记录里很难找到。

Ms Werning therefore decided to trace the phenomenon of rapid growth back as far as she could in the fossil record, by examining the bones of a wide variety of species.
ECONOMIST: Or, rather, the dinosaur and the crocodile