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AAPG Bulletin, Preliminary version published online
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DOI:10.1306/06112422064
Automicritic slope boundstone unassociated with depleted metazoan-algal 
benthic
ecosystems: the Triassic Great Bank of Guizhou carbonate platform, Xiliang margin, China
benthic ecosystems: the Triassic Great Bank of Guizhou carbonate platform, Xiliang margin, ChinaBrian M. Kelley1 , Daniel J. Lehrmann2 , Meiyi Yu3 , Kimberly V. Lau1 , Demir Altiner4 , Marcello Minzoni5 , Paul Enos6 , Xiaowei Li3 , and Jonathan L. Payne7
1 Department of Geosciences, Penn State University, University Park, PA 16802, USA
2 Geosciences Department, Trinity University, San Antonio, TX 78212, USA
3 Department of Resources and Environmental Engineering, Guizhou University, Huaxi, Guizhou Province 550025, China
4 Department of Geological Engineering, Middle East Technical University, Dumlupinar Blv. No: 1, 06531 Ankara, Turkey
5 Department of Geological Sciences, University of Alabama, Tuscaloosa, AL 35487, USA
6 Department of Geology, University of Kansas, Lawrence, KS 66045, USA
7 Department of Earth and Planetary Sciences, Stanford University, Stanford, CA 94305, USA
Ahead of Print Abstract
benthic ecosystems. To test this association, we investigated automicritic boundstone occurrence across the end-Permian extinction and Triassic biotic recovery on the Xiliang slope of the Great Bank of Guizhou (GBG), an isolated carbonate platform in South China. Our findings indicate that automicritic boundstone accumulation was not enhanced by depleted Early Triassic benthic ecosystems. Instead, detrital sediment dominated the GBG slope, and automicritic boundstone was absent until the late Spathian (latest Early Triassic), 4–5 million years after extinction. Beginning in upper Spathian strata, automicrite forms small (
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