Late-Glacial Chronology and Glacio-Isostatic Recovery, Home Bay, East Baffin Island, Canada

Research Article| April 01, 1970 Late-Glacial Chronology and Glacio-Isostatic Recovery, Home Bay, East Baffin Island, Canada J. T ANDREWS; J. T ANDREWS Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, Boulder, Colorado 80302 Search for other works by this author on: GSW Google Scholar JANE T BUCKLEY; JANE T BUCKLEY Geological Survey of Canada, Ottawa, Ontario, Canada Search for other works by this author on: GSW Google Scholar J. H ENGLAND J. H ENGLAND Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80302 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1970) 81 (4): 1123–1148. https://doi.org/10.1130/0016-7606(1970)81[1123:LCAGRH]2.0.CO;2 Article history received: 02 Apr 1969 accepted: 05 Nov 1969 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 J. T ANDREWS, JANE T BUCKLEY, J. H ENGLAND; Late-Glacial Chronology and Glacio-Isostatic Recovery, Home Bay, East Baffin Island, Canada. GSA Bulletin 1970;; 81 (4): 1123–1148. doi: https://doi.org/10.1130/0016-7606(1970)81[1123:LCAGRH]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 Fossiliferous raised marine deposits occur around Home Bay, east Baffin Island, Northwest Territory. We developed a late-glacial chronology on the bases of 32 radiocarbon dates and morphostratigraphic evidence. In addition, the similarity of observed and predicted postglacial emergence curves enabled development of techniques that provided age estimates of marine limits throughout the area, and allowed construction of an isochron map for deglaciation.Retreat of the fiord glaciers was relatively rapid (average 27 m yr−1) between 10,000 and about 8000 B.P. Evidence for a major readvance of the glaciers about 8000 years ago includes moraines overlying marine clay, elevation of associated raised delta deposits relative to local marine limits, and a prominent and extensive moraine, the Ekalugad Moraine (new name). Related radiocarbon dates are similar in age to the Cockburn Moraine of Arctic Canada. Another moraine, dated about 6800 B.P., is of similar age to the Isortoq Moraine of west Baffin Island. Valley glaciers from the main interior ice sheets were still descending to near sea level only 4500 to 4000 years ago. Disappearance of the interior ice sheet west of Home Bay apparently coincided with, or at least preceded, the growth of the local mountain ice caps.Marine limit elevations are a function of distance from the continental shelf (a measure of ice thickness) and date of deglaciation; elevations, consequently, incline inland to the outer limit of the Ekalugad Moraine (from 40 m to a maximum of 91 m) and then decline inland, thus reflecting the slow deglaciation and the importance of restrained rebound. Isobases are oriented from 140° to 320°. Glacio-isostatic recovery has led to the warping of former marine planes. Maximum tilt on the oldest strandline (8600 years old) is 1.8m km−1. 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.