| Qinling- Dabie Mountains is not only an important part of middle ridge which connected with Tibet-Qinghai Plateau, but also the boundary between different climate of the South and North China. It has a grate effect on east China's environment geology problems. Studies on the land sediment laying over the Dabie Mountains, can help us to find the change in this area and the law between this change and Huaihe river's evolvement.The area which I have studied is located on the source area of the Huaihe River, in Henan province. In this area, there are lots of sequential sediment revealed adequately. The problems for Tectonics, such as the upheave of Dabie Mountains and the sedimentation of Huaihe river, will soon ravel out.This article analyses two sediment sections by useing four experimentations, based on a great deal of field observations. The primary coclusions are as follows:1.Based on the result of Clay Mineral studies, all the sediment came from one and the same place.2. Geochemistry experiment shows that this area hasn't had a condition of developing the glacier, but it's a reflect of the ice age in Quaternary. And the climate in that period was similar to the one from the globe which changes regularity in Pleistocene, existing some small dissimilarities.3. Particle-size distribution proved that all the sediment was composed by two parts, a little water-borne sediment and mass wind-borne sediment. Especially, the GS section plane, a section plane formed by a whilom anabranch, showed the different characteristic of these two sediment.4. A detailed entironment in Pleistocene on this area is showed by synthetical analyze of Geochemistry, particle-size distribution and magnetic susceptibility result.
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