皖南青弋江、水阳江地区第四纪沉积与环境变迁

QUATERNARY SEDMENTAION AND PALEOENVIRONMENTAL CHANGES OF THE QINGYI RIVER AREA AND THE SHUIYANG RIVER AREA IN THE SOUTHERN ANHUI PROVINCE

本文依据野外观察、钻孔资料、孢粉分析、^（14）C测年资料及邻区地层对比,研究调查区第四纪沉积特征及地层划分,根据第四纪沉积物的资料,追溯本区自早更新世以来的古地理环境特征及其演变过程。

This paper comprehcncivc analyses the Quaternary scdmentary features and paleocnvilronmental changes in the Qingyi river area and the Shuiyang river area, Anhui province.The investigation area with it's early pleistocene scries (Q1), middle pleistocene scries (Q2) , later plcistone series (Q3) and Holoccnc scries (Q4) cover an area of more than 65 percent of the Qingyi river and the Shuiyang river in the southern Anhui province. It's chief types of origin are alluviation , diluvium, slope wash, sedimentary and their mixture, etc. Quatcrary system is merely 23-160 m thickness. Distrbution of sediment displays an obvious zoing-south to north. According to the data of Quaternary strata, gcomorphology, sporo-pollcn analysis, characteristic of the tectonic movements, etc, the palcocnvironmcntal changes of this area is also analysiscd.