This paper is devoted to the description of the early Triassic Dongchuanformation in Weining, western Guizhou, including its depositional sequences, lateral extent, and fossilassemblages as well. Lithostratigraphicall...This paper is devoted to the description of the early Triassic Dongchuanformation in Weining, western Guizhou, including its depositional sequences, lateral extent, and fossilassemblages as well. Lithostratigraphically, the formation contains four members , each of which corre-spends to a major depositional cycle composed upward of : reddish argillites, grey and purple siltstonesand sandstones, and limestones. The lithology, sedimental textures, and fossil assemblages indicate alacustrine environment which is in contrast with coeval sedimentary environments elsewhere inGuizhou. It is supposed to be a new stratigraphic unit.展开更多
文摘This paper is devoted to the description of the early Triassic Dongchuanformation in Weining, western Guizhou, including its depositional sequences, lateral extent, and fossilassemblages as well. Lithostratigraphically, the formation contains four members , each of which corre-spends to a major depositional cycle composed upward of : reddish argillites, grey and purple siltstonesand sandstones, and limestones. The lithology, sedimental textures, and fossil assemblages indicate alacustrine environment which is in contrast with coeval sedimentary environments elsewhere inGuizhou. It is supposed to be a new stratigraphic unit.
