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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • The geologic basis for a reconstruction of a grounded ice sheet in McMurdo Sound, Antarctica, at the Last Glacial Maximum
  • The overall results in this paper afford a background for interpreting the glacial chronology of eastern Taylor Valley and for reconstructing a grounded ice sheet in the overall Ross Embayment at the Last Glacial Maximum (LGM)
  • During the Last Glacial Maximum, a coalescent ice mass consisting of the grounded Ross Sea ice sheet and an expanded Wilson Piedmont Glacier covered the southern Scott Coast. Based on marine deposits, features of marine erosion, radiocarbon dates
  • of raised beaches, marine shells, lacustrine algae, most recession of grounded ice in Ross Sea Embayment occurred in mid to late Holocene time, after deglacial sea-level rise due to melting of Northern Hemisphere ice sheets essentially was accomplished
  • . Rising sea level alone could not have driven grounding-line retreat back to the present-day Siple Coast.
  • Evidence from Taylor Valley for a grounded ice sheet in the Ross Sea, Antarctica
  • Radiocarbon chronology of Ross Sea drift, eastern Taylor Valley, Antarctica : evidence for a grounded ice sheet in the Ross Sea at the Last Glacial Maximum
  • Valley and from shells from McMurdo Sound suggests grounding-line retreat from the vicinity of Ross island between 6500 and 8340 C 14 yr BP. Rising sea level may have triggered internal mechanisms within the ice sheet that led to retreat, but did
  • This paper describes glacial drift at Cape Bird, located near the northern tip of Ross Island, that points to ice-surface elevations in excess of 590 m in north-eastern McMurdo Sound, consistent with the model of extensive grounded ice at the Last
  • This paper describes a new mechanism observed in a modern perennially ice-covered proglacial lake that documents the movement of glacial debris beyond the grounding line across the surface of the lake. This mechanism accounts for the absence