Abstract:The sedimentology of three sections showing the Permian-Triassic (P-T) transition on an Upper Permian reef in Ziyun, Guizhou Province, southwest China provides evidence of sea-level fall in this area. The P-T transition in the Gendan section, which covers a reef-front sequence, contains a subaerial exposure surface and various desiccation cracks (including rolled-up chips, in-chip cracks, pyramid cracks, vertical cracks and sheet cracks), indicating sea-level falls. The P-T transition in the Shitouzhai section… Show more
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