Impact-induced mass wasting at the K-T boundary: Blake Nose, western North Atlantic

Research Article| April 01, 2000 Impact-induced mass wasting at the K-T boundary: Blake Nose, western North Atlantic Adam Klaus; Adam Klaus 1Ocean Drilling Program and Department of Oceanography, Texas A&M University, 1000 Discovery Drive, College Station, Texas 77845, USA Search for other works by this author on: GSW Google Scholar Richard D. Norris; Richard D. Norris 2Mail Stop 23, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Dick Kroon; Dick Kroon 3Department of Geology and Geophysics, University of Edinburgh, Edinburgh, Scotland Search for other works by this author on: GSW Google Scholar Jan Smit Jan Smit 4Department of Sedimentology, Faculty of Earth Sciences, Vrije Universiteit, de Boelelaan 1085, 1081HV Amsterdam, Netherlands Search for other works by this author on: GSW Google Scholar Author and Article Information Adam Klaus 1Ocean Drilling Program and Department of Oceanography, Texas A&M University, 1000 Discovery Drive, College Station, Texas 77845, USA Richard D. Norris 2Mail Stop 23, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Dick Kroon 3Department of Geology and Geophysics, University of Edinburgh, Edinburgh, Scotland Jan Smit 4Department of Sedimentology, Faculty of Earth Sciences, Vrije Universiteit, de Boelelaan 1085, 1081HV Amsterdam, Netherlands Publisher: Geological Society of America Received: 07 Oct 1999 Revision Received: 10 Jan 2000 Accepted: 14 Jan 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (4): 319–322. https://doi.org/10.1130/0091-7613(2000)28<319:IMWATK>2.0.CO;2 Article history Received: 07 Oct 1999 Revision Received: 10 Jan 2000 Accepted: 14 Jan 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Adam Klaus, Richard D. Norris, Dick Kroon, Jan Smit; Impact-induced mass wasting at the K-T boundary: Blake Nose, western North Atlantic. Geology 2000;; 28 (4): 319–322. doi: https://doi.org/10.1130/0091-7613(2000)28<319:IMWATK>2.0.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 Seismic reflection data combined with results from ocean drilling document regional-scale slumping associated with the Cretaceous-Tertiary (K-T) impact event. The K-T boundary is biostratigraphically complete at three Ocean Drilling Program sites (1049, 1050, and 1052) located on Blake Nose (30°N, 75°W) off eastern Florida in water depths of 1300–2600 m. Maastrichtian chalk is folded and fractured below the K-T boundary at all three sites, whereas lowermost Paleocene clays and chalks are undeformed. Deformation is pervasive in Maastrichtian at the deepest water site (Site 1049), whereas at the shallower water sites (Sites 1050 and 1052) thick intervals of structurally intact Maastrichtian chalk are separated by thinner intervals of highly deformed sediments. Correlation of core to seismic reflection data indicates that the K-T boundary immediately overlies seismic facies characteristic of mass wasting that extend across most of the ∼55 km distance of the depth transect. Maastrichtian sediments appear to have moved as large slump blocks on the upper part of Blake Nose but deformed more uniformly in the deeper water parts of the transect. We suggest that mass wasting occurred on the Blake Nose >1600 km from the Chicxulub crater in response to the cataclysmic seismicity generated by the impact. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.