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Faulted Limestone Block Dredged from Blake Escarpment

1971; Geological Society of America; Volume: 82; Issue: 1 Linguagem: Inglês

10.1130/0016-7606(1971)82[199

1943-2674

Robert E. Sheridan, R. M. BERMAN, D. B. CORMAN,

Geological formations and processes

Research Article| January 01, 1971 Faulted Limestone Block Dredged from Blake Escarpment R. E SHERIDAN; R. E SHERIDAN Department of Geology, University of Delaware, Newark, Delaware 19711 Search for other works by this author on: GSW Google Scholar R. M BERMAN; R. M BERMAN Department of Geology, University of Delaware, Newark, Delaware 19711 Search for other works by this author on: GSW Google Scholar D. B CORMAN D. B CORMAN Department of Geology, University of Delaware, Newark, Delaware 19711 Search for other works by this author on: GSW Google Scholar Author and Article Information R. E SHERIDAN Department of Geology, University of Delaware, Newark, Delaware 19711 R. M BERMAN Department of Geology, University of Delaware, Newark, Delaware 19711 D. B CORMAN Department of Geology, University of Delaware, Newark, Delaware 19711 Publisher: Geological Society of America Received: 11 Jun 1970 Revision Received: 12 Aug 1970 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1971, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1971) 82 (1): 199–206. https://doi.org/10.1130/0016-7606(1971)82[199:FLBDFB]2.0.CO;2 Article history Received: 11 Jun 1970 Revision Received: 12 Aug 1970 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation R. E SHERIDAN, R. M BERMAN, D. B CORMAN; Faulted Limestone Block Dredged from Blake Escarpment. GSA Bulletin 1971;; 82 (1): 199–206. doi: https://doi.org/10.1130/0016-7606(1971)82[199:FLBDFB]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 SocietyGSA Bulletin Search Advanced Search Abstract An in-place limestone block dredged from the upper part of the Blake escarpment (1630 to 2000 m) has two distinct shear planes at an acute angle with well-developed slickensides. The orientation of the slickenside grooves parallel to bedding defined by miliolid foraminifera and lips on the slickenside surface indicate that strike-slip displacement, probably right-lateral, was involved in the faulting. Paleontological and outcrop depth evidence suggest a Late Cretaceous (Cenomanian-Campanian ?) age for the dredged boulder. This faulting of Cretaceous strata at the Blake escarpment is believed to be associated with the Great Abaco fault, a presumed extension from transform faulting along a fracture zone of the Mid-Atlantic Ridge. 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.