Supplemental Material: Age, material source, and formation mechanism of bedding-parallel calcite beef veins: Case from the mature Eocene lacustrineshales in the Biyang Sag, Nanxiang Basin, China

Figure S1: Correlations of vein density vs. TOC, calcite, and dolomite contents of host shales; Figure S2: The box plots of calcite contents in shale samples with and without beef veins; Table S1: LA-MC-ICP-MS carbonate U-Pb dating data.