Glacial geomorphology of the Victoria Valley System, Ross Se
Details of Research
TitleGlacial geomorphology of the Victoria Valley System, Ross Sea Region, AntarcticaAbstractDuring the 2011-2012 austral summer, we had the opportunity to verify a surficial geology map prepared nearly 50. years ago for the Victoria Valley system (VVS), the largest of the McMurdo Dry Valleys. We used high-resolution landsat images and a digital elevation model to identify landforms and prepare detailed maps of each of the five valleys in the VVS, including lateral and end moraines, rock glaciers, gelifluction sheets, gravel ripples, and hummocky and ice-cored drifts. Our mapping suggests that the Bull drift is less extensive than previously thought, attains a maximum elevation of  . 750. m in Balham and Barwick Valleys and the upper Bull Pass region, and does not occur in McKelvey Valley. We found Insel drift to 850. m elevation in eastern McKelvey Valley and upper Bull Pass and were able to trace Insel drift down Bull Pass where it becomes Peleus drift in Wright Valley. The Victoria Lower Glacier likely responded to grounding of ice in the Ross Embayment and was out-of-phase with alpine glaciers elsewhere in the VVS. We amplified and quantified CalkinÅ› relative chronology and provide here our multiple-parameter relative chronology for the McMurdo Dry Valleys that is based on surface-boulder weathering, soil weathering, salt stage, degree of development of the desert pavement, and form of patterned ground. Except for Victoria Lower Valley, we correlate Packard drift with Taylor II drift (ca., 120. ka), Vida drift with Taylor III drift (ca., 300. ka), Bull drift with Taylor IVb drift (2.7-3.5. Ma, and Insel drift with Peleus drift (>. 3.7. Ma, <. 5.4. Ma). The lack of a strong correlation between soil salt stage and depth of visible salts with elevation leads us to question whether a high-level lake (ca., 200. m deep) existed in the VVS during the early Holocene. â"' 2013 Elsevier B.V.AcknowledgementsWe appreciate the financial support of the Ministry of Science and Innovation and logistic support of Antarctica New Zealand. We are grateful for the support of the Scott Base staff and R. McPhail of Helicopters New Zealand. Permission to camp and collect samples in ASPA 123 was kindly granted by the Minister of Foreign Affairs under the Antarctica (Environmental Protection) Act 1994.
Details
1st AuthorBockheim, J.AuthorBockheim, J.McLeod, M.Year2013JournalGeomorphologyVolume193Pages14-24DOI10.1016/j.geomorph.2013.03.020URLhttps://www.scopus.com/inward/recor.....4f74b6f0f6c188bef4e2bd679Keywordsdigital elevation modeldrift (glacial deposit)geomorphologyglacial landformHoloceneLandsatmoraineripplerock glaciersaline soilvalley glacier, AntarcticaBull PassEast AntarcticaMcMurdo Dry ValleysRoss SeaSouthern OceanVictoria Valley [East Antarctica], rank5Author KeywordsAlpine glaciersGlacial geologyMcMurdo Dry ValleysSoil development
Other
TypeArticleCitationBockheim, J. and McLeod, M. (2013). Glacial geomorphology of the Victoria Valley System, Ross Sea Region, Antarctica. Geomorphology, 193: 14-24 IdentifierBockheim2013bRelevancerank5
McLeod, M., Glacial geomorphology of the Victoria Valley System, Ross Se , [Bockheim2013b]. Antarctica NZ, accessed 12/02/2025, https://adam.antarcticanz.govt.nz/nodes/view/63402, 10.1016/j.geomorph.2013.03.020