cretaceous

1.Cretaceous granites form a northerly trending belt.

白垩花岗的分布呈带状向北延伸。

2.Abstract :The Cretaceous greenhouse climate and paleoceanography is one of hot topics in the Earth sciences during the past twenty years.

白垩典型的“温室”气候和海洋一直是地学界关注的一。

3.No creditable macrofossil record of the Fagaceae exists in the Cretaceous deposits and all the Cretaceous microfossil reports remain equivocal and require further study.

白垩尚无壳斗科可靠的大化石记录，微化石需要进一步研究才能确定亲缘关系以及古新世壳斗科已经分化出两个类群。

4.In both cases, the researchers have evoked scenarios of Cretaceous vicariance, followed by endemic species radiation within Madagascar and subsequent dispersal from Madagascar to other areas.

这些情形，研究人员已经考虑了白垩的隔离，接着特有种在马达加斯加听散布及随后从马达加斯加扩散到其中地区域。