The Cretaceous-Tertiary boundary cocktail: Chicxulub impact triggers margin collapse and extensive sediment gravity flows

Research Article| April 01, 1998 The Cretaceous-Tertiary boundary cocktail: Chicxulub impact triggers margin collapse and extensive sediment gravity flows Timothy J. Bralower; Timothy J. Bralower 1Department of Geology, University of North Carolina, Chapel Hill, North Carolina 27599 Search for other works by this author on: GSW Google Scholar Charles K. Paull; Charles K. Paull 1Department of Geology, University of North Carolina, Chapel Hill, North Carolina 27599 Search for other works by this author on: GSW Google Scholar R. Mark Leckie R. Mark Leckie 2Department of Geosciences, University of Massachusetts, Amherst, Massachusetts 01003 Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (4): 331–334. https://doi.org/10.1130/0091-7613(1998)026<0331:TCTBCC>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Timothy J. Bralower, Charles K. Paull, R. Mark Leckie; The Cretaceous-Tertiary boundary cocktail: Chicxulub impact triggers margin collapse and extensive sediment gravity flows. Geology 1998;; 26 (4): 331–334. doi: https://doi.org/10.1130/0091-7613(1998)026<0331:TCTBCC>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A distinctive mixture of reworked microfossils, impact-derived materials, and lithic fragments occurs in sediments at the Cretaceous-Tertiary boundary in the basinal Gulf of Mexico and Caribbean. We have named this mixture the Cretaceous-Tertiary boundary "cocktail." Lithologic and paleontologic evidence suggests that the cocktail was deposited by giant sediment gravity flows, apparently triggered by the collapse of continental margins around the Gulf of Mexico as a result of the Chicxulub impact. As most microfossils in the gravity-flow units are reworked, biostratigraphy provides only maximum ages. Recognition of the cocktail is a reliable way to identify Cretaceous-Tertiary boundary deposits in the basinal Gulf of Mexico and Caribbean. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.