On the Evolution of Paleoclimate and Paleoenvironment in Eastern Beijing Plain in the Last 70,000 Years Based on the Sediment Chronological Framework

To study the paleoenvironment and paleoclimate of eastern Beijing Plain, this paper, based on particle size analysis sporopollen analysis, constructs a sediment chronological framework. Combining with previous research outcomes, it reveals evolution process rules Plain. The shows that climate environment Plain has changed from humid cold, warm to dry cool, which provides some basis for studying even world’s paleoclimate, presenting great significance.