Title: Abrupt early Holocene (9.9-9.6 ka) ice-stream advance at the mouth of Hudson Strait, Arctic Canada
Abstract: Research Article| December 01, 1993 Abrupt early Holocene (9.9-9.6 ka) ice-stream advance at the mouth of Hudson Strait, Arctic Canada Darrell S. Kaufman; Darrell S. Kaufman 1Center for Geochronological Research, Institute of Arctic and Alpine Research, Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0450 Search for other works by this author on: GSW Google Scholar Gifford H. Miller; Gifford H. Miller 1Center for Geochronological Research, Institute of Arctic and Alpine Research, Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0450 Search for other works by this author on: GSW Google Scholar Jay A. Stravers; Jay A. Stravers 2Department of Geology, Northern Illinois University, DeKalb, Illinois 60115 Search for other works by this author on: GSW Google Scholar John T. Andrews John T. Andrews 3Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado,Boulder, Colorado 80309-0450 Search for other works by this author on: GSW Google Scholar Author and Article Information Darrell S. Kaufman 1Center for Geochronological Research, Institute of Arctic and Alpine Research, Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0450 Gifford H. Miller 1Center for Geochronological Research, Institute of Arctic and Alpine Research, Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0450 Jay A. Stravers 2Department of Geology, Northern Illinois University, DeKalb, Illinois 60115 John T. Andrews 3Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado,Boulder, Colorado 80309-0450 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (12): 1063–1066. https://doi.org/10.1130/0091-7613(1993)021<1063:AEHKIS>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 Email Permissions Search Site Citation Darrell S. Kaufman, Gifford H. Miller, Jay A. Stravers, John T. Andrews; Abrupt early Holocene (9.9-9.6 ka) ice-stream advance at the mouth of Hudson Strait, Arctic Canada. Geology 1993;; 21 (12): 1063–1066. doi: https://doi.org/10.1130/0091-7613(1993)021<1063:AEHKIS>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 Radiocarbon-dated glacial-geologic evidence documents an abrupt advance of the northern margin of the Labrador sector of the Laurentide Ice Sheet during the last deglaciation. Ice-flow directional indicators, together with ice-marginal features found onshore and offshore, delimit an ice stream that advanced north-northeast >300 km, crossed the mouth of Hudson Strait and outer Frobisher Bay, and overran summits ∼400 m above sea level on outer Hall Peninsula, southeast Baffin Island. Fifty-eight 14C ages, including 27 accelerator mass spectrometry ages on single shells, indicate that the advance was extremely rapid. The entire advance-retreat cycle took place in an ∼300 yr (14C) interval, 9.9-9.6 ka. At its maximum extent, the ice stream supported a calving margin >200 km long terminating in open water ∼500 m deep, implying a massive iceberg release. Marine evidence for the outflow is preserved along the Labrador Sea shelf as thick carbonate-rich glacial-marine drift but has not been recognized farther east in the North Atlantic. Either the discharge of icebergs was insufficient to produce a trans-North Atlantic, carbonate-rich (Heinrich) layer, or the icebergs tracked southward where they encountered warming sea-surface temperatures. Although the advance seems to have been coincident with a brief interval of minor regional cooling, it failed to trigger a significant climate perturbation, suggesting that the ocean-atmosphere system had attained its stable interglacial condition by that time. 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.
Publication Year: 1993
Publication Date: 1993-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 64
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