O'Brien, Philip E.; Cooper, Alan K.; Florindo, Fabio; Handwerger, David A.; Lavelle, Mark; Passchier, Sandra; Pospichal, James J.; Quilty, Patrick G.; Richter, Carl; Theissen, Kevin M.; Whitehead, Jason M. (2004): Prydz channel fan and the history of extreme ice advances in Prydz Bay. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: Cooper, Alan K., O'Brien, Philip E., Richter, Carl, Barr, Samantha R., Bohaty, Steven M., Claypool, George E., Damuth, John E., Erwin, Patrick S., Florindo, Fabio, Forsberg, Carl Fredrik, Gruetzner, Jens, Handwerger, David A., Januszczak, Nicole N., Kaiko, Alexander, Kryc, Kelly A., Lavelle, Mark, Passchier, Sandra, Pospichal, James J., Quilty, Patrick G., Rebesco, Michele A., Strand, Kari O., Taylor, Brian, Theissen, Kevin M., Warnke, Detlef A., Whalen, Patricia A., Whitehead, Jason M., Williams, Trevor, Proceedings of the Ocean Drilling Program; scientific results; Prydz Bay-Cooperation Sea, Antarctica; glacial history and paleoceanography; covering Leg 188 of the cruises of the drilling vessel JOIDES Resolution; Fremantle, Australia, to Hobart, Tasmania; Sites 1165-1167; 10 January-11 March 2000, 188, georefid:2004-083826

During the late Neogene, the Lambert Glacier-Amery Ice Shelf drainage system flowed across Prydz Bay in an ice stream that reached the shelf edge and built a trough mouth fan on the upper continental slope. The adjacent banks saw mostly subglacial till deposition beneath slower-moving ice. The fan consists mostly of debris flow deposits derived from the melting out of subglacial debris at the grounding line at the continental shelf edge. Thick debris flow intervals are separated by thin mudstone horizons deposited when the ice had retreated from the shelf edge. Age control at Ocean Drilling Program Site 1167 indicates that the bulk of the trough mouth fan was deposited prior to approximately 780 ka with as few as three debris flow intervals deposited since then. This stratigraphy indicates that extreme advances of the Lambert Glacier-Amery Ice Shelf system ceased during the mid-Pleistocene. Possible causes for this change are progressive over-deepening of the inner shelf, a reduction in maximum ice volumes in the interior of the East Antarctic Ice Sheet caused by temperature change, and a change in the interaction of Milankovich cycles and the response time of the ice sheet.
West: 72.1700 East: 72.1800 North: -66.2400 South: -66.2400
Expedition: 188
Site: 188-1167
Supplemental Information:
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Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.188.016.2004 (c.f. for more detailed metadata)
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