英语语法分析

Although named after a site in Australia, the Ediacaran formation is worldwide in distribution and dates to Precambrian times.

尽管伊迪卡拉是以澳大利亚的一处地名而命名，但伊迪卡拉沉积层却遍及世界各地，并且可追溯到前寒武纪时代。

The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.

然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。

They are Precambrian rocks.

它们是前寒武纪岩石。