Research Article| May 01, 1991 Two Late Proterozoic glaciations, Mackenzie Mountains, northwestern Canada J. D. Aitken J. D. Aitken 1Geological Survey of Canada, 3303 33rd St. NW, Calgary T2A 2A7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information J. D. Aitken 1Geological Survey of Canada, 3303 33rd St. NW, Calgary T2A 2A7, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (5): 445–448. https://doi.org/10.1130/0091-7613(1991)019<0445:TLPGMM>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. D. Aitken; Two Late Proterozoic glaciations, Mackenzie Mountains, northwestern Canada. Geology 1991;; 19 (5): 445–448. doi: https://doi.org/10.1130/0091-7613(1991)019<0445:TLPGMM>2.3.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 Glacial influence on deposition of the upper Proterozoic Sayunei and Shezal Formations (Rapitan Group) of northwestern Canada is well established. Diamictites of the Stelfox Member of the Ice Brook Formation, 1 km higher in the section and resting on platformal carbonate and siliciclastic strata of the Keele Formation, are here interpreted as glaciomarine. The glacial interpretation is based on the presence of dropstones, till pellets, extremely angular quartz grains, intercalations of laminated mudrocks and sandstone, and rare striated stones. The Stelfox glacial deposits are unique in that they lie above the lowest occurrence of faunas of Ediacaran type.The establishment of two episodes of Late Proterozoic glaciation in northwestern Canada, as opposed to the previously recognized single episode, enhances the possibility that these two glaciations correspond to the two recognized in parts of Australia and Africa. 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.