It was apparent that the glaciation occurred in the relatively recent past because the drift was soft, like freshly deposited sediment.
很明显冰川作用就发生在相对不远的过去，因为漂流物很软，像新鲜的沉积物。
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。
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