Deep sea-floor evidence of past ice streams off the Antarctic Peninsula

Research Article| January 01, 2000 Deep sea-floor evidence of past ice streams off the Antarctic Peninsula Miquel Canals; Miquel Canals 1Consolidated Research Group on Marine Geosciences, Department of Stratigraphy and Paleontology, Faculty of Geology, University of Barcelona, Campus de Pedralbes, E-08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Roger Urgeles; Roger Urgeles 1Consolidated Research Group on Marine Geosciences, Department of Stratigraphy and Paleontology, Faculty of Geology, University of Barcelona, Campus de Pedralbes, E-08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Antoni M. Calafat Antoni M. Calafat 1Consolidated Research Group on Marine Geosciences, Department of Stratigraphy and Paleontology, Faculty of Geology, University of Barcelona, Campus de Pedralbes, E-08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information Miquel Canals 1Consolidated Research Group on Marine Geosciences, Department of Stratigraphy and Paleontology, Faculty of Geology, University of Barcelona, Campus de Pedralbes, E-08028 Barcelona, Spain Roger Urgeles 1Consolidated Research Group on Marine Geosciences, Department of Stratigraphy and Paleontology, Faculty of Geology, University of Barcelona, Campus de Pedralbes, E-08028 Barcelona, Spain Antoni M. Calafat 1Consolidated Research Group on Marine Geosciences, Department of Stratigraphy and Paleontology, Faculty of Geology, University of Barcelona, Campus de Pedralbes, E-08028 Barcelona, Spain Publisher: Geological Society of America Received: 11 May 1999 Revision Received: 02 Sep 1999 Accepted: 15 Sep 1999 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (1): 31–34. https://doi.org/10.1130/0091-7613(2000)0282.0.CO;2 Article history Received: 11 May 1999 Revision Received: 02 Sep 1999 Accepted: 15 Sep 1999 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Miquel Canals, Roger Urgeles, Antoni M. Calafat; Deep sea-floor evidence of past ice streams off the Antarctic Peninsula. Geology 2000;; 28 (1): 31–34. doi: https://doi.org/10.1130/0091-7613(2000)0282.0.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 The past existence of a giant ice stream off the northern end of the Antarctic Peninsula is suggested by a convex-upward, elongated sediment body now at a mean water depth of 1000 m. Because of its morphological characteristics, i.e., a set of parallel to subparallel ridges and grooves to 100 km long, with an overall width of 25 km, we call this depositional body a bundle structure. We hypothesize that bundle structures form by accumulation of basal deformation till under their parent ice streams. From its location, size, and overall characteristics the bundle structure described here constitutes the best preserved, largest, deepest, and relatively low latitude evidence of giant ice streams that flowed offshore Antarctica during glacial maxima. Bundle structures reveal the very dynamic behavior of ice caps in the northern Antarctic Peninsula during the last glacial maximum, with catchment areas draining rapidly under marine-based critical subglacial conditions. Bundle structures represent a new megascale streamlined glacial landform. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.