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S1. Correlation of Arenicolites horizons and ratio of dolomite/calcite of the carbonate beds analyzed by XRD analysis. Note that most of the Arenicolites horizons are located in the limestone, not in heavily dolomitized parts.S1. 阿雷尼科利斯迹层（Arenicolites horizons）与经X射线衍射（XRD）分析的碳酸盐岩床的白云石/方解石比值的相关性。注：绝大多数阿雷尼科利斯迹层均赋存于石灰岩中，而非强白云岩化地层内。