Thursday, May 30, 2013

Highlights—Impact of the Impact

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.

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