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Storm deposits within the WIS

Are there any identified storm surge deposits within the Cretaceous Western Interior Seaway? If so, have any fossil material [dinosaur or other] been found in association? Given suggested paleocirculation of offshore currents and surface waters, and winds, how likely was animal dispersal [rafting] between Appalachia and Laramidia? Do you think the presence of ankylosaurs and proto-hadrosaurs in ocean deposits indicate a beach-combing lifestyle?