一、前言 贵州三叠系地层层序十分完整,分布广泛,不同沉积类型和不同岩相区具有各有特色的生物群落。北部扬子区以浅海碳酸盐岩、滨岸碎屑岩及陆相砂页岩为主的沉积类型,南部和西南部主要为广海盆地砂页岩及碳酸盐岩组成,富含浮游型菊石和瓣鳃,过去由于发现碳酸盐岩重力流和陆源碎屑重力流而对其环境分析偏于较深水认识。近年来由于不断发现风暴岩而将愈来愈动摇这种认识。贵州册享县丫他地区三叠系风暴岩的发现,再次证明:右江区三叠系的沉积环境的多样性。下中三叠统尤其如此。 I. INTRODUCTION The sequence of the Triassic strata in Guizhou is quite complete and widely distributed. Different sedimentary types and different lithofacies regions have their own characteristic biological communities. The northern Yangtze area is dominated by shallow-sea carbonate rocks, coastal clastic rocks and continental sand shale. The southern and southwestern parts of the Yangtze River are mainly composed of sand shale and carbonate rocks from the Guanghai basin, and are rich in planktonic In the past, ammonites and flap gills have historically been biased toward deeper understanding of their environment due to the discovery of carbonate gravity flow and terrestrial debris gravity flow. In recent years, this understanding has been increasingly shaken by the constant discovery of storm rock. The discovery of Triassic storm rocks in Yahe area, Shibao County, Guizhou Province again proves that the diversity of the sedimentary environment of Triassic in Youjiang area. This is particularly true for the Lower Triassic.