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An Early Triassic stromatolitic deposit is documented in the Dienerian succession of the Lower Triassic Feixianguan Formation in the Xingyi area, Guizhou, southwest China. Five types of constructional microbial forms at various scales were observed. (1) Typical stratified columnar structures, up to 25 cm in height, with crinkled laminae. Dark-coloured laminae, 1 mm thick, are composed of upright filamentous...
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