THE CHARACTERISTIC OF GEOLOGIC STRUCTURE IN SHANGHAI
Gu Pentao;Wang Yaoshun Hydrogeologic and engineering geologic party of Shanghai
Shanghai is at Abstract the northeastern end of the Yangtze paraplatform. The pre-Jinning cycle belongs to the stage of geosyncline development. The folded basement of the platform in this area is composed of metamorphic lock series. The Caledonian cycle belongs to the stage of paraplatform development. Its tectonic layer has developed completely, represented by marine and shallow marine continuous sedi- ments. The Indosinian movement ended the history of long-continued transgression in the area, and ushered in a new era of the Peri-Pacific continental-margin activity. The Yanshanian cycle witnessed very active structural disturbances and magmatic activity. In the Himalayan cycle, oscillatory movement occurred frequently.