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。
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。
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。
Manning speculated that the dinosaur collapsed in a riverbed during the late Cretaceous Period and was rapidly buried in mineral-rich wet sand, preventing bacteria from devouring all of its tissue.
曼宁推测，在晚白垩世时期，恐龙倒在河床上，并迅速埋在矿产丰富的湿砂，(这些沙)防止了细菌吞食其所有的组织。
The actual split between the two groups, though, had happened much earlier, during the Jurassic period, and by the late Cretaceous there were many species of bird around.
尽管，这两种物种早在侏罗纪时期就已分道扬镳，而且，到了白垩纪后期，已出现了许多种的鸟类。
One confounding factor is that the late Cretaceous was also a period of great volcanic activity.
但后白垩纪火山运动频繁，这一点很容易混淆视听。
It can be as a marker member of Late Cretaceous for its broad distribution in geography, but short duration in geologic period and well used for strata classification and correlation.
在我国上白垩统普遍见到，其地理分布广，地质时限短，可作为晚白垩世的标志分子，在地层划分对比中举足轻重。
After reverse tectonic period in Late Cretaceous and Neogene, it became a relict basin with oil-gas and coal.
经晚白垩世和新近纪的构造反转改造后，呈改造残留型含油气、含煤盆地。
In Hunan province, it took place in the period between early-middle stage and late stage of late Cretaceous epoch. Its structural features are angular disconformity or paraconformity.
湖南晚燕山运动发生于晚白垩世中早期与晚白垩世晚期之间，其构造形迹为角度不整合及假整合关系。
And the crust continued to be extensional during the Late Cretaceous and Tertiary period resulting from the volcanic sedimentary association with the rift type characteristics.
晚白垩世—第三纪地壳继续处于拉张松弛环境，形成以裂谷环境为主要特征的火山—沉积岩石组合。
And the crust continued to be extensional during the Late Cretaceous and Tertiary period resulting from the volcanic sedimentary association with the rift type characteristics.
晚白垩世—第三纪地壳继续处于拉张松弛环境，形成以裂谷环境为主要特征的火山—沉积岩石组合。
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