The Littoral Karst Landform Morphological Characteristics And Formation Mechanism Of Dalian Chengshantou National Nature Reserve

The landform of Karst is widely distributed in China and internally diverse landscape types, the most typical areas are the Yunnan, Guizhou and Guangxi provinces. In recent years, With the rapid development of geophysics, geochemics, biology, atmospheric sciences and digital earth subject and so on, and technology continuously updated, research content of Karst is more abundant. In the past years, scholars of China have done more research work in this field thoroughly and synthesized. Some special Institute of Karst Geology, CAGS, The Karst Dynamics Laboratory and International Research Center on Karst (IRCK) have set up. Some research projects has applied and implemented, as IGCP299, IGCP379, IGCP448, IGCP513, and now, IGCP598 has psssed. It's scale of space-time is extended, researchers take new technique and new approach to improve resolution of Karst research continuously . it is thus clear that researchers is large, they have made great achievements and research of Karst are in the ascendant.However, domestic and international research is much less on the littoral Karst landform and the research is not thorough enough. Karst landform generally occurs in Southern China, and Northern Areas spread mainly on North China, while Karst landform evolution of northeast China is poor, because it is conditioned by natural environment. The littoral Karst landform of Dalian Chengshantou national nature was well-preserved that it's special significance is already visible.Most of valuable geological and topographical resources of the littoral Karst landform of Dalian Chengshantou national nature as a base for scientific research and science education. Paleogeography, paleoclimate and palaeoenvironment as well as evolutional history is recorded by colourful sedimentary structures,the particular littoral Karst landform landscapes and typical structure features, it provided valuable data for research earth history. The littoral Karst landform is greatly significant for global geological research in Quaternary Period, especially for cause of formation of the Yellow Sea and the Bohai Sea, marine transgression and regression, the ice age.Consequently, research local landscape characteristics of the littoral Karst landform and analyze formation period and formation mechanism are of great importance to the local geological relics protection, tourism development and scientific research. This paper uses the basic theories of Sedimentology, Geomorphology, Geology, Environmental magnetism, the research method of this thesis combines field geological investigation with indoor experimental analysis, the solution is that the littoral Karst landform morphological characteristics divide into three levels: 9 types is surface morphology of rock, 3 types is swallow hole between rock columns, 4 types is the littoral Karst landform, in addition, 5 types is typical abrasion geomorphy. This article pass though cross-disciplinary research and concentrate on environmental change interact with littoral karst systems in geologic epoch, besides, this article is also based on environmental change information in different periods was recorded by lateritic crust of weathering, loess and mixed-liquor, obtain that the littoral Karst landform differ from abrasion geomorphy, it has special formation mechanism that presently seawater futher erode and corrode after ancientkarst formation, and it is the result of the mutual action of the salt water and the fresh water.