Paleolatitude of glaciogenic upper Precambrian Rapitan Group and the use of tillites as chronostratigraphic marker horizons

Abstract

Research Article| February 01, 1977 Paleolatitude of glaciogenic upper Precambrian Rapitan Group and the use of tillites as chronostratigraphic marker horizons W. A. Morris W. A. Morris 1Geomagnetic Laboratory, Earth Physics Branch, Department of Energy, Mines and Resources, Ottawa, Ontario K1A 0Y3 Search for other works by this author on: GSW Google Scholar Author and Article Information W. A. Morris 1Geomagnetic Laboratory, Earth Physics Branch, Department of Energy, Mines and Resources, Ottawa, Ontario K1A 0Y3 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1977) 5 (2): 85–88. https://doi.org/10.1130/0091-7613(1977)5<85:POGUPR>2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation W. A. Morris; Paleolatitude of glaciogenic upper Precambrian Rapitan Group and the use of tillites as chronostratigraphic marker horizons. Geology 1977;; 5 (2): 85–88. doi: https://doi.org/10.1130/0091-7613(1977)5<85:POGUPR>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 Currently available paleomagnetic evidence for the depositional paleolatitude of upper Precambrian glacial horizons is inconclusive. Unless it can be shown that glaciation occurred as a synchronous world-wide event, the use of tillities as chronostratigraphic marker horizons is not warranted. Paleomagnetic analysis of the upper Precambrian glaciogenic Lower Rapitan Subgroup in northwestern Canada has revealed three remanence directions. Remanence X is indicative of low paleolatitude, whereas remanence Y was acquired in high paleolatitudes. The preferred sequence, X is older than Y, is based on the evidence of stratigraphic considerations and prolonged chemical leaching. A third remanence, Z, is related to late deformation and (or) exhumation of the Rapitan Group. 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.