地质历史时期的生物遗留在沉积物表面或沉积物内部的各种生命活动的形迹构造形成的化石。不包括由生物体变成的实体化石,更不包括各种自然应力(物理的和化学的)所形成的无机沉积构造。从沉积学角度来看也可以说遗迹化石是各种生物成因的沉积构造,如各种生物扰动、足迹、移迹、潜穴、粪化石等;以及生物侵蚀构造,如钻孔等。
据初步统计,已有7科、10属、19种之多,且与霸王龙、鸭咀龙、蜥脚类及轮藻、孢粉、痕迹化石等共生。
The fossil dinosaur eggs included 19 species assinged to 10 genera belonged 7 families. They are assosiated with Hadrosaurs, Tyrannosaurs, Sauropods, Charophytes, Sporopollen and trace fossils et al.
研究小组发现了两块有砍刮痕迹的骨骼化石,这就是曾经进行肉类切割的证据。
The research team found two fossil bones with cut and scrape marks, signs of meat carving.
因为这些化石太古老,加上非洲太炎热,无法找到分子存活的明显痕迹。
They are too old and Africa is too hot for significant traces of the molecule to have survived.
I don't see dinosaurs, but of course they leave traces behind in fossils.
我没见过恐龙,但是无疑的,他们留下了化石这样的痕迹。
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