Many scientists provided valuable research and input into the creation of the geologictime scale.
许多科学家为地质时间尺度的建立提供了有价值的研究和投入。
2
As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologictime periods.
作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。
3
The drift of the last glaciation was deposited during one of the most recent epochs of geologictime, the Pleistocene, which lasted from 1.8 million to 10,000 years ago.