Major Neogene fluctuations of the East Antarctic ice sheet: Stratigraphic evidence from the Lambert Glacier region

Research Article| October 01, 2000 Major Neogene fluctuations of the East Antarctic ice sheet: Stratigraphic evidence from the Lambert Glacier region Michael J. Hambrey; Michael J. Hambrey 1Centre for Glaciology, University of Wales, Aberystwyth SY23 3DB, UK Search for other works by this author on: GSW Google Scholar Barrie McKelvey Barrie McKelvey 2Division of Earth Sciences, University of New England, Armidale NSW 3251, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information Michael J. Hambrey 1Centre for Glaciology, University of Wales, Aberystwyth SY23 3DB, UK Barrie McKelvey 2Division of Earth Sciences, University of New England, Armidale NSW 3251, Australia Publisher: Geological Society of America Received: 30 Mar 2000 Revision Received: 06 Jul 2000 Accepted: 14 Jul 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (10): 887–890. https://doi.org/10.1130/0091-7613(2000)28<887:MNFOTE>2.0.CO;2 Article history Received: 30 Mar 2000 Revision Received: 06 Jul 2000 Accepted: 14 Jul 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Michael J. Hambrey, Barrie McKelvey; Major Neogene fluctuations of the East Antarctic ice sheet: Stratigraphic evidence from the Lambert Glacier region. Geology 2000;; 28 (10): 887–890. doi: https://doi.org/10.1130/0091-7613(2000)28<887:MNFOTE>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 SocietyGeology Search Advanced Search Abstract Stratigraphic and sedimentological data are presented from a region likely to directly record the evolution of the East Antarctic ice sheet. Along the western margin of the Lambert graben, which now drains ∼1 × 106 km2 or one-eighth of the total area of the East Antarctic ice sheet, extensive remnants of Cenozoic glaciomarine fjordal sediment, known as the Pagodroma Group, are preserved as far as several hundred kilometers inland from the open coast. The sediments resemble those produced by tidewater glaciers in the Arctic, rather than those of modern Antarctica. Four separate formations of the Pagodroma Group, spanning the interval from early Miocene (or older) to Pliocene or early Pleistocene are preserved; the oldest and highest crop out at nearly 1500 m above sea level. Each formation was deposited in close proximity to an ice margin grounded on the fjord bottom during major recessional phases of the Lambert Glacier. Underlying each formation is a glacially cut erosion surface. Each surface records a separate stage of fjord excavation when ice expanded onto the continental shelf in Prydz Bay. Evidence from offshore drilling in Prydz Bay and these data indicate fluctuations of the Lambert Glacier terminus in excess of 500 km in Neogene time, thereby reflecting large changes in the volume of the ice sheet. Depositional episodes were succeeded by phases of uplift totalling more than 1500 m. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.