Submarine glacial landforms and rates of ice-stream collapse

Research Article| October 01, 2008 Submarine glacial landforms and rates of ice-stream collapse J.A. Dowdeswell; J.A. Dowdeswell 11Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER, UK Search for other works by this author on: GSW Google Scholar D. Ottesen; D. Ottesen 22Geological Survey of Norway, Trondheim N-7491, Norway Search for other works by this author on: GSW Google Scholar J. Evans; J. Evans 33Department of Geography, Loughborough University, Loughborough LE11 3TU, UK Search for other works by this author on: GSW Google Scholar C. Ó Cofaigh; C. Ó Cofaigh 44Department of Geography, Durham University, Durham DH1 3LE, UK Search for other works by this author on: GSW Google Scholar J.B. Anderson J.B. Anderson 55Department of Earth Sciences, Rice University, Houston, Texas 77005, USA Search for other works by this author on: GSW Google Scholar Author and Article Information J.A. Dowdeswell 11Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER, UK D. Ottesen 22Geological Survey of Norway, Trondheim N-7491, Norway J. Evans 33Department of Geography, Loughborough University, Loughborough LE11 3TU, UK C. Ó Cofaigh 44Department of Geography, Durham University, Durham DH1 3LE, UK J.B. Anderson 55Department of Earth Sciences, Rice University, Houston, Texas 77005, USA Publisher: Geological Society of America Received: 24 Jan 2008 Revision Received: 01 Jul 2008 Accepted: 08 Jul 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2008 Geological Society of America Geology (2008) 36 (10): 819–822. https://doi.org/10.1130/G24808A.1 Article history Received: 24 Jan 2008 Revision Received: 01 Jul 2008 Accepted: 08 Jul 2008 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.A. Dowdeswell, D. Ottesen, J. Evans, C. Ó Cofaigh, J.B. Anderson; Submarine glacial landforms and rates of ice-stream collapse. Geology 2008;; 36 (10): 819–822. doi: https://doi.org/10.1130/G24808A.1 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 The rate of deglacial ice-sheet retreat across polar continental shelves, and possible ice-stream collapse and sea-level rise, has been much debated. High-resolution imagery of seafloor morphology is available for many polar shelves and fjords. The rapidity of ice retreat is inferred from diagnostic assemblages of submarine landforms, produced at ice-stream sedimentary beds. These landforms, exposed by ice retreat across high-latitude shelves, demonstrate that deglaciation occurs in three main ways: rapidly, by flotation and breakup; episodically, by still-stands and/or grounding events punctuating rapid retreat; or by slower retreat of grounded ice. Submarine landform assemblages imply, through the presence of grounding-zone wedges overprinting mega-scale glacial lineations on many polar shelves, that ice-stream retreat is more often episodic than catastrophic. These observations provide a robust test of the ability of numerical models to predict the varied response of ice-sheet basins to environmental changes. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.