Emergence of the Late Permian Changhsingian Reefs at theEnd of the PermianWU Yasheng, FAN Jiasong (Institute of Geology andGeophysics, Chinese Academy of Sciences, Beijing 100029);and JIN Yugan (Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences, Nanjing, Jiangsu 210008)Dolostones occur on the top of the reef core, reef front and backreef sequences of the Upper Permian The Changhsingian reef inZiyun County Guizhou Province, southwestern China.Comprehensive study on them reveals that these dolostones areof the supratidal Sabkha genesis: (1) All have δ~(18)O values higherthan those of their precursor limestones; (2) All have Sr and Fecontents similar to those of known typical supratidal Sabkhaevaporative finely crystalline dolostones from a well in theOrdos Basin, Shanxi-Gansu-Ningxia provinces, China; (3) Allare composed of finely crystalline euhedral-subhedral dolomites;