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The Old Fort Point Formation: Redefinition and formal subdivision of a distinctive stratigraphic marker in the Neoproterozoic Windermere Supergroup, southern Canadian Cordillera

2014; Canadian Society of Petroleum Geologists; Volume: 62; Issue: 1 Linguagem: Inglês

10.2113/gscpgbull.62.1.1

2368-0261

Mark David Smith, R. W. C. Arnott, Gerald M. Ross,

Geochemistry and Geologic Mapping

Research Article| March 01, 2014 The Old Fort Point Formation: Redefinition and formal subdivision of a distinctive stratigraphic marker in the Neoproterozoic Windermere Supergroup, southern Canadian Cordillera M.D. Smith; M.D. Smith Department of Earth Sciences, University of Ottawa, Marion Hall, 140 Louis Pasteur, Ottawa, ON K1N 6N5, Canada Search for other works by this author on: GSW Google Scholar R.W.C. Arnott; R.W.C. Arnott Department of Earth Sciences, University of Ottawa, Marion Hall, 140 Louis Pasteur, Ottawa, ON K1N 6N5, Canada Search for other works by this author on: GSW Google Scholar G.M. Ross G.M. Ross Kupa'a Farm, P.O.Box 458, Kula, HI 96790, USA Search for other works by this author on: GSW Google Scholar Author and Article Information M.D. Smith Department of Earth Sciences, University of Ottawa, Marion Hall, 140 Louis Pasteur, Ottawa, ON K1N 6N5, Canada R.W.C. Arnott Department of Earth Sciences, University of Ottawa, Marion Hall, 140 Louis Pasteur, Ottawa, ON K1N 6N5, Canada G.M. Ross Kupa'a Farm, P.O.Box 458, Kula, HI 96790, USA Publisher: Canadian Energy Geoscience Association Received: 04 Mar 2013 Accepted: 11 Feb 2014 First Online: 13 Jul 2017 Online ISSN: 2368-0261 Print ISSN: 0007-4802 © the Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2014) 62 (1): 1–13. https://doi.org/10.2113/gscpgbull.62.1.1 Article history Received: 04 Mar 2013 Accepted: 11 Feb 2014 First Online: 13 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation M.D. Smith, R.W.C. Arnott, G.M. Ross; The Old Fort Point Formation: Redefinition and formal subdivision of a distinctive stratigraphic marker in the Neoproterozoic Windermere Supergroup, southern Canadian Cordillera. Bulletin of Canadian Petroleum Geology 2014;; 62 (1): 1–13. doi: https://doi.org/10.2113/gscpgbull.62.1.1 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 SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract The southern Canadian Cordillera strata of the Neoproterozoic Windermere Supergroup form an areally extensive outcrop belt of deep-marine sedimentary rocks. Within this generally monotonous pile of siliciclastic and minor carbonate rocks, the Old Fort Point Formation forms a lithologically and geochemically distinctive unit that serves as a key regional stratigraphic marker. New sedimentologic and stratigraphic work demonstrates that it is lithologically distinctive, mappable and correlatable on a regional scale and deserves formal recognition.The Old Fort Point Formation comprises three lithostratigraphic members that have a consistent stratigraphic relationship across the basin and can easily be distinguished from lithofacies in the enveloping strata of the Windermere Supergroup. The basal Temple Lake Member is composed primarily of siltstone to mudstone that grades upward into rhythmically interstratified limestone-siltstone. The middle Geikie Siding Member is a thin, organic-rich mudstone-pelite. The Whitehorn Mountain Member is the uppermost unit and varies locally and regionally in thickness and lithology, including diamictite, breccia to conglomerate, mudstone to siltstone, subarkose, quartzarenite, calcareous arenite, arenaceous limestone, and limestone.This unique lithostratigraphic unit is here formally named the Old Fort Point Formation and other site-specific names should be discontinued. The use of the name Old Fort Point Formation is an attempt to simplify part of a complicated and informally defined stratigraphic nomenclature currently in use for rocks in the Neoproterozoic Windermere Supergroup, southern Canadian Cordillera. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.