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1·Many scientists provided valuable research and input into the creation of the geologic time 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 geologic time 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 geologic time, the Pleistocene, which lasted from 1.8 million to 10,000 years ago.

最后一次冰川作用的漂浮物沉积在最近的其中一个地质时期——更新世，这段时期从180万年前持续到1万年前。

4·A hiatus is the total interval of geologic time.

一个沉积间断是地质时间的总间隔。

5·The longest division of geologic time, containing two or more eras.

地质上最长的一段分期；两个或更多的代。

6·Over geologic time, they have ebbed and flowed with natural climate cycles.

在整个地质时期，它们随着自然地气候循环减小或涨大。

7·Geologic time unit, rock stratigraphic units and time stratigraphic unit.

地质年代单位、岩石地层单位、年代地层单位。

8·As he explains, the Geologic Time Scale is largely based on the stratigraphic record.

他解释说，地质时间尺度很大程度上基于对地层的记录。

9·Although rare on human timescales, over geologic time earthquakes are frequent in the area.

影响地质时期的大地震虽然在人类的历史中非常罕见，但该地区地震活动自古以来就非常频繁。

10·You can't discuss climate change, Prof. Laughlin says, without looking backward across geologic time.

劳克林说，在讨论气候变化问题时，必须对比过去地质时期的情况。