In the early pleistocene Epoch, due to long-term weathering and denudation, the area where West Lake was located developed into a broad valley.
早更新世，由于长期风华剥蚀，西湖所在地区形成一宽古。
By the early part of the twentieth century, scientists believed that four distinct glaciations had affected North America and Europe during the Pleistocene epoch.
到二十世纪初，科学家们认为，在更新世期间，有四次不同的冰川作用对北美和欧洲产生了影响。
The Yumen fault has been active since the Early Pleistocene to the present day, so it is an active fault during the Holocene Epoch and a causative fault of the Yumen earthquake.
玉门断裂自早更新世以来一直活动，是现代地震断裂，也是玉门地震的发震断裂。
The Yumen fault has been active since the Early Pleistocene to the present day, so it is an active fault during the Holocene Epoch and a causative fault of the Yumen earthquake.
玉门断裂自早更新世以来一直活动，是现代地震断裂，也是玉门地震的发震断裂。
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