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dc.contributor.authorBentley, Michael Jen_UK
dc.contributor.authorSugden, David Een_UK
dc.contributor.authorHulton, Nicholas R Jen_UK
dc.contributor.authorMcCulloch, Roberten_UK
dc.description.abstractWe report the results of glacial geomorphological mapping of the Strait of Magellan and Bahía Inútil, southernmost South America. Our aims are to determine the pattern and process of deglaciation during the last glacial–interglacial transition, and to provide a firm geomorphological basis for the interpretation of radiocarbon, cosmogenic isotope and amino acid dates for the timing of deglaciation. The area is important because it lies in a southerly location, providing a link between Antarctica and southern mid-latitudes, and also lies in the zone of the southern westerlies which are a key element in regional climate change. Our mapping shows that it is possible to make a clear weathering and morphological distinction between last glaciation and older landforms and sediments. Within the last glacial deposits we have identified a number of former glacier limits. The key to delineating many of these limits is continuous meltwater channels that run for several kilometres along the outer edge of discontinuous moraine belts. There are four distinct belts of moraines within the deposits of the last glaciation in the central part of the Strait of Magellan. There are two closely spaced major limits (B and C) at the north end of the Strait that reach Punta Arenas airport on the west side, and Península Juan Mazia on the east side. A third limit (D) terminates south of Punta Arenas on the west side, and passes close to Porvenir on the east. In Bahía Inútil there is a more complex pattern with a prominent outer limit (C) and a series of four equally prominent limits (D1 to D4) on both sides of the bay. South of these limits, there is a fourth group of moraine limits (E) on both coasts of the northern end of Isla Dawson, reflecting the last fluctuations of the Magellan glacier before final deglaciation of the southern end of the Strait. There are a number of drumlins within the outer moraine limits. The drumlins are draped by small, younger moraines showing that they have been overridden by subsequent advance(s). The coastlines of the study area are cut by a number of shorelines which record the presence of ice-dammed lakes in the Strait of Magellan and Bahía Inútil during the later stages of deglaciation. We conclude that there are four main readvances or stillstands that marked the transition from the Last Glacial Maximum to the onset of the Holocene.en_UK
dc.relationBentley MJ, Sugden DE, Hulton NRJ & McCulloch R (2005) The landforms and pattern of deglaciation in the Strait of Magellan and Bahia Inu'til, southernmost South America. Geografiska Annaler: Series A, Physical Geography, 87 (2), pp. 313-333.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.titleThe landforms and pattern of deglaciation in the Strait of Magellan and Bahia Inu'til, southernmost South Americaen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Bentley et al 313.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.citation.jtitleGeografiska Annaler: Series A, Physical Geographyen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationDurham Universityen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.subject.tagReconstructing Past Environmentsen_UK
dc.subject.tagEnvironmental Changeen_UK
dc.subject.tagEnvironmental Geographyen_UK
dc.subject.tagGlacial response to climate changeen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorBentley, Michael J|en_UK
local.rioxx.authorSugden, David E|en_UK
local.rioxx.authorHulton, Nicholas R J|en_UK
local.rioxx.authorMcCulloch, Robert|0000-0001-5542-3703en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameBentley et al 313.pdfen_UK
Appears in Collections:Biological and Environmental Sciences Journal Articles

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