THE CARBONIFEROUS SEDIMENTARY ENVIRONMENTS AND THE BRYOZOAN-CORAL PATCH REEF OF THE DA-TANG AGE OF THE LONG-PING CARBONATE PLATFORM IN TIANLING COUNTY，GUANGXI PROVINCE

The Longping carbonate platform is located in the N anpan River area in the w estern part of the continental m argin fault basin in South China. In this area, it is a smaller one in a series of isolated carbonate platforms. It is surrounded by the NW and NE trench-rift of the graben type. The platforms are formed by the rising of horst fault. In the Carboniferous epoch, there was a successional carbonate deposits area. T he bryozoan-coral reef is located in the southern tip of the plat- form--sear Gan Dong Zi.