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Lithofacies and biofacies changes through the Ordovician and Silurian transition on the Yangtze platform are coincident with stepwise mass extinctions, recovery events, global sea-level changes, and regional palaeogeographic configurations. Facies patterns through three intervals, the late-mid Ashgill, Hirnantian, and early Rhuddanian, indicate that black shale occupied most of the Yangtze platform...
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