Late Quaternary sediments and chronology of the northeast Labrador Shelf (Karlsefni Trough, Saglek Bank): Links to glacial history

Abstract

Research Article| November 01, 1999 Late Quaternary sediments and chronology of the northeast Labrador Shelf (Karlsefni Trough, Saglek Bank): Links to glacial history Frank R. Hall; Frank R. Hall 1Department of Geology and Geophysics, University of New Orleans, New Orleans, Louisiana 70126 Search for other works by this author on: GSW Google Scholar John T. Andrews; John T. Andrews 2Institute for 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 Anne Jennings; Anne Jennings 2Institute for 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 Gustav Vilks; Gustav Vilks 3Atlantic Geoscience Centre, Bedford Institute of Oceanography, Dartmouth, Nova Scotia B2Y 4A2, Canada Search for other works by this author on: GSW Google Scholar Kate Moran Kate Moran 3Atlantic Geoscience Centre, Bedford Institute of Oceanography, Dartmouth, Nova Scotia B2Y 4A2, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Frank R. Hall 1Department of Geology and Geophysics, University of New Orleans, New Orleans, Louisiana 70126 John T. Andrews 2Institute for Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0450 Anne Jennings 2Institute for Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0450 Gustav Vilks 3Atlantic Geoscience Centre, Bedford Institute of Oceanography, Dartmouth, Nova Scotia B2Y 4A2, Canada Kate Moran 3Atlantic Geoscience Centre, Bedford Institute of Oceanography, Dartmouth, Nova Scotia B2Y 4A2, Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1999) 111 (11): 1700–1713. https://doi.org/10.1130/0016-7606(1999)111<1700:LQSACO>2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Frank R. Hall, John T. Andrews, Anne Jennings, Gustav Vilks, Kate Moran; Late Quaternary sediments and chronology of the northeast Labrador Shelf (Karlsefni Trough, Saglek Bank): Links to glacial history. GSA Bulletin 1999;; 111 (11): 1700–1713. doi: https://doi.org/10.1130/0016-7606(1999)111<1700:LQSACO>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 SocietyGSA Bulletin Search Advanced Search Abstract Core HU87033-015, an 11-m-long giant piston core from the western end of Karlsefni Trough, was taken only 25 km from the coast of northernmost Labrador. The regional acoustic framework was established via a high-resolution, deep-towed (Huntec DTS) seismic survey. We recognized four acoustic facies that are associated with designated and recovered major lithologic units. The ages of these units were determined from 13 accelerator mass spectrometry 14C dates from marine biogenic carbonates. These results suggest that glacial ice was present on the shelf from at least the mid-Wisconsinan and that the basal sequence contains reworked glacial-marine diamicton. Furthermore, our data provide the first evidence that the northern Labrador inner shelf was ice free by ca. 11 14C ka. The bulk of the postglacial deposition was around 8.2 ka and consists of increased detrital carbonate deposition. The deposition of this detrital carbonate is age equivalent with DC-0 on the southeastern Baffin Shelf and in the North Atlantic. 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.