New COCORP profiling in the southeastern United States. Part II: Brunswick and east coast magnetic anomalies, opening of the north-central Atlantic Ocean

Abstract

Research Article| October 01, 1985 New COCORP profiling in the southeastern United States. Part II: Brunswick and east coast magnetic anomalies, opening of the north-central Atlantic Ocean K. D. Nelson; K. D. Nelson 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar J. H. McBride; J. H. McBride 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar J. A. Arnow; J. A. Arnow 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar J. E. Oliver; J. E. Oliver 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar L D. Brown; L D. Brown 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar S. Kaufman S. Kaufman 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar Author and Article Information K. D. Nelson 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 J. H. McBride 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 J. A. Arnow 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 J. E. Oliver 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 L D. Brown 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 S. Kaufman 1Institute for the Study of the Continents (INSTOC), Snee Hall, Cornell University, Ithaca, New York 14853 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1985) 13 (10): 718–721. https://doi.org/10.1130/0091-7613(1982)13<718:NCPITS>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation K. D. Nelson, J. H. McBride, J. A. Arnow, J. E. Oliver, L D. Brown, S. Kaufman; New COCORP profiling in the southeastern United States. Part II: Brunswick and east coast magnetic anomalies, opening of the north-central Atlantic Ocean. Geology 1985;; 13 (10): 718–721. doi: https://doi.org/10.1130/0091-7613(1982)13<718:NCPITS>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 New COCORP profiles on the coastal plain of Georgia and northern Florida support the hypothesis that the Brunswick anomaly marks a late Paleozoic suture. They do not support the alternate view that this anomaly is caused by a Mesozoic rift basin. The trend of the Brunswick anomaly relative to the Appalachian gravity gradient indicates that in westernmost Georgia and adjacent Alabama, African basement (Suwannee terrane) is in proximity to autochthonous North American basement (Grenville). Farther east one or more Paleozoic accreted terranes intervene between the North American and African sides of the orogen. Offshore, the Brunswick anomaly closely parallels the east coast magnetic anomaly. This relationship implies that the east coast magnetic anomaly marks not only the present continental/oceanic crustal transition but also the northward continuation of the late Paleozoic suture between North America and Africa. Transitional crust beneath the Carolina Trough, Baltimore Canyon trough, and correlative parts of the African Atlantic margin is thus likely to have formed within a preexisting suture zone. The dramatic change in character of the U.S. Atlantic margin southward from the Carolina Trough to the Blake Plateau probably reflects the fact that two different types of prerift crust are juxtaposed in this region. 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.