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Along with the progress in research on the Precambrian, Molar-tooth carbonates (simplified as MT, or microsparite carbonates or MT structure) which were formed in the Middle-Late Proterozoic have become a hot subject recently. The Proterozoic Molar-tooth (MT) carbonate rocks refer to those Meso-to Neoproterozoic (1600–650 Ma) carbonates with MT structure, i.e., a series of peculiar, ptygmatically...
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