Evidence for a grounded ice sheet on the Ross Sea continental shelf during the Late Pleistocene and preliminary paleodrainage reconstruction

Anderson, John B.; Shipp, Stephanie; Bartek, Louis R.; Reid, David E.

doi:10.1029/ar057p0039

Cited by 71 publications

(58 citation statements)

References 34 publications

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“…The continental margin is characterized by over-deepened shelves and a sedimentary record containing evidence for multiple retreats and advances of glaciations during the Cenozoic (Anderson et al, 1992). This makes the Ross Embayment a unique place to investigate environmental changes such as reactions of the West Antarctic Ice Sheet (WAIS) to climatic changes associated with both warmer and colder temperatures, respectively.…”

Section: The Ross Sea Appropriate Study Site For Ice Sheet/shelf Varmentioning

confidence: 99%

Geochemical provenance analysis of fine-grained sediment revealing Late Miocene to recent Paleo-Environmental changes in the Western Ross Sea, Antarctica

Monien¹,

Kuhn²,

Eynatten³

et al. 2012

Global and Planetary Change

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Section: The Ross Sea Appropriate Study Site For Ice Sheet/shelf Varmentioning

confidence: 99%

Geochemical provenance analysis of fine-grained sediment revealing Late Miocene to recent Paleo-Environmental changes in the Western Ross Sea, Antarctica

Monien¹,

Kuhn²,

Eynatten³

et al. 2012

Global and Planetary Change

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“…A widespread drift sheet, mapped by glacial geologic and marine geophysical methods, indicates that a grounded ice sheet spread out onto the continental shelf in the Ross Sea Embayment at one or more times during the Quaternary (Scott, 1905;Stuiver et al, 1981;Denton et al, 1989;Anderson et al, 1992;Shipp et al, 1999;Denton and Hughes, 2000). The extent of these grounding-line advances has been debated, resulting in considerable variation in estimates of the overall Antarctic contribution to eustatic sea-level drop at the last glacial maximum (LGM) (Drewry, 1979;Stuiver et al, 1981;Denton et al, 1989;Huybrechts, 1990;Colhoun et al, 1992;Bentley, 1999;Denton and Hughes, 2002).…”

Section: Introductionmentioning

confidence: 98%

Surficial geology and geomorphology of eastern and central Wright Valley, Antarctica

Hall

Denton

2005

Geomorphology

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“…1; Stuiver et al 1981;Elverhøi 1981;Denton et al 1989a;Anderson et al 1992;Bentley and Anderson 1998;Licht et al 1999;Shipp et al 1999). However, the extent of grounded ice in the Ross Sea Embayment has been under debate (Colhoun et al 1992).…”

Section: Introductionmentioning

confidence: 99%

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

Hall

Denton

2000

Geografiska Annaler: Series A, Physical Geography

109

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More than 250 radiocarbon dates of lacustrine algae and marine shells afford a chronology for Ross Sea drift in eastern Taylor Valley. Dates of algae that lived in ice‐dammed Glacial Lake Washburn show that grounded Ross Sea ice blocked the mouth of Taylor Valley between 8340 and 23,800 14C yr bp. Ross Sea ice was at its maximum position at the Hjorth Hill moraine between 12,700 and 14,600 14C yr bp and was within 500m distance of this position as late as 10,794 14C yr bp. The implication is that the flow line of the Ross Sea ice sheet which extended around northern Ross Island and across McMurdo Sound to Taylor Valley must have remained intact, and hence that a grounded ice sheet must have existed east of Ross Island as late as 8340 14C yr bp. Evidence from ice‐dammed lakes in Taylor Valley and from shells from McMurdo Sound suggests grounding‐line retreat from the vicinity of Ross Island between 6500 and 8340 14C yr bp. If this is correct, then most recession to the present‐day grounding line on the Siple Coast took place subsequently in the absence of significant deglacial sea‐level rise. Rising sea level may have triggered internal mechanisms within the ice sheet that led to retreat, but did not in itself drive continued ice‐sheet recession. Ice retreat, once set in motion, continued in the absence of sea‐level forcing. If correct, this hypothesis implies that the grounding line could continue to recede into the interior reservoir of the West Antarctic Ice Sheet.

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Evidence for a grounded ice sheet on the Ross Sea continental shelf during the Late Pleistocene and preliminary paleodrainage reconstruction

Cited by 71 publications

References 34 publications

Geochemical provenance analysis of fine-grained sediment revealing Late Miocene to recent Paleo-Environmental changes in the Western Ross Sea, Antarctica

Geochemical provenance analysis of fine-grained sediment revealing Late Miocene to recent Paleo-Environmental changes in the Western Ross Sea, Antarctica

Surficial geology and geomorphology of eastern and central Wright Valley, 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

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