Relict subglacial deltas on the Antarctic Peninsula outer shelf

Research Article| January 01, 1995 Relict subglacial deltas on the Antarctic Peninsula outer shelf R. D. Larter; R. D. Larter 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom Search for other works by this author on: GSW Google Scholar L. E. Vanneste L. E. Vanneste 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom Search for other works by this author on: GSW Google Scholar Geology (1995) 23 (1): 33–36. https://doi.org/10.1130/0091-7613(1995)023<0033:RSDOTA>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 MailTo Tools Icon Tools Get Permissions Search Site Citation R. D. Larter, L. E. Vanneste; Relict subglacial deltas on the Antarctic Peninsula outer shelf. Geology 1995;; 23 (1): 33–36. doi: https://doi.org/10.1130/0091-7613(1995)023<0033:RSDOTA>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 The first deep-tow boomer survey on the Antarctic continental margin has revealed relict subglacial deltas on the outer continental shelf off the Antarctic Peninsula. Progradation of subglacial deltas is thought to take place at the grounding lines of ice streams which flow on deforming subglacial till. Acoustic characteristics and estimation of likely sediment transport rates suggest that these features were produced by late-stage readvance of grounding lines during the waning of the last ice sheet that covered the shelf. This readvance could have taken place during the Younger Dryas (12.9–11.6 ka), but changes in sea level and climate may not be the only important controls on subglacial delta formation. The discovery of relict subglacial deltas on the outer shelf is consistent with the hypothesis that the grounded ice sheet in these areas was low profile and fast flowing. If low-profile grounded ice extended to the shelf edge in many places around Antarctica at times of glacial maximum, this could explain the greater glacial maximum ice-sheet extent in interpretations based on offshore data, compared with reconstructions based on onshore data and numerical glaciological models. 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.