Pleistocene Climate
Paragraph 1: Even though glaciation of the Northern Hemisphere began earlier, we currently recognize 1.6 million years ago as the start of the Pleistocene epoch, corresponding to the southward advance of large ice sheets in North America and Europe. The final retreat (melting and backward movement) of these glaciers northward began roughly 13,000 years ago and didn’t actually end until the ice margins reached their present position about 8,000 years ago.
完整版题目和答案请付费后查阅
