Based on the study of profile properties,structures and textures,mass composition of Xiashu soil under the mountain ridge of Yushan,and the behavior of neotectonic movement,and in combination with the contrast of regional Xiashu soil,the authors discussed the origin of Xiashu soil around the hilly lands and the isolated hill in south Jiangsu,and it is concluded that,during the formation of Xiashu soil,wind is the first and primary transportation agent and water is the second and subordinate transportation agent.

The types of geological relics and tourism resources in Yushan region of Changshu City were depicted in the text.The geological relics landscape falls into six subtypes and fifteen elementary types.There are seventy three sites of scenic spots,in which,twenty-six is sorted to be class one landscape,nineteen class two landscape,twenty-eight class three.The scientific value,aesthetic value and cultural and historic value were analyzed and their development conditions were evaluated.It is concluded that Yushan region is provided with the conditions of founding a geopark,a base for scientific investigation and popularization,a scenic spot along Changjiang delta lines.