Biostratigraphic correlation , paleoenvironment stress , and subrosion pipe collapse : Dutch Rhaetian shales uncover their secrets


A subrosion pipe or sinkhole is a geologic phenomenon that occurs due to dissolution of strata in the subsurface causing the overlying sediments to collapse. The subrosion pipe in the Winterswijk quarry complex in the eastern Netherlands yielded rare, dark-colored shales. Bivalves and palynomorphs indicate that the shales were deposited during the Rhaetian… (More)

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