Pteranodons lived 60 million years ago. That time was called the late Cretaceous period.

无齿翼龙生活在6000万年前，这个时候是白垩纪晚期。

youdao

Mosasaurs breathed air and were powerful swimmers that were well-adapted to living in the warm, shallow epicontinental seas prevalent during the Late Cretaceous Period.

默兹河蜥必须呼唤空气生存，白垩纪后期浅浅的陆缘海随处可见，默兹河蜥已经很好地适应了这种环境，成为十分强劲的游泳能手。

youdao

But B. sealeyi is a completely new species, found nowhere else-proving that the Southwest had its own top predator stalking the tropical forests and rivers of the late Cretaceous period.

但是B . sealeyi完全是一个新物种，在别处没有类似的——这也证明了，在西南部地区也有特定的位于食物链最高层的食肉动物，他们潜伏在白垩纪的热带森林和河流附近。

youdao

Scientists say it formed when high sea levels flooded the middle of North America, splitting the continent in two for millions of years during the late Cretaceous period.

VOA: special.2010.10.05

The Tyrannosaurus lived in North America during the late Cretaceous Period.

VOA: special.2009.09.01

My piece is set in the late Cretaceous period, 65 million years ago (give or take a few).

FORBES: Prototyping The Distant Future

One confounding factor is that the late Cretaceous was also a period of great volcanic activity.

ECONOMIST: Mass extinctions