The nature of the Cretaceous-Paleogene
boundary, and the events recorded in that interval, remain the subject of
considerable debate. Here, Yancey and Liu describe sedimentologic and stratigraphic data from twenty
sections along the Brazos River and from nearby cores. The data include a dominance of mass
flows and tempestites that include impact ejecta, and are interpreted to
represent the record of mass flows and numerous great storm events associated
with the Chicxulub impact, followed by a return to normal conditions. The data suggest that tsunami waves are
not a pronounced influence, contrary to previous interpretations.
Impact-Induced
Sediment Deposition On An Offshore, Mud-Substrate Continental Shelf, Cretaceous–Paleogene
Boundary, Brazos River, Texas, U.S.A.
by Thomas E. Yancey and Chengjie Liu
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