We appreciate Kershaw et al.'s comment and continued interest in our Permian–Triassic research in the Nanpanjiang Basin. Kershaw et al. comment on aspects of our recent study that contradict results from the study of Collin et al. (2009). Specifically their comments center around two questions: (1) whether the truncation surface at the base of the Permian–Triassic microbialite shows evidence for subaerial exposure, and (2) whether data support the model of genesis of the microbialites by upwelling of anoxic, alkaline waters with elevated carbonate saturation from bacterial sulfate reduction (Kershaw et al. 1999, 2007, 2012).

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