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Patagonian ice sheet

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Journal Article
Journal: Geology
Published: 01 February 2011
Geology (2011) 39 (2): 103-106.
...Andrew S. Hein; Tibor J. Dunai; Nicholas R.J. Hulton; Sheng Xu Abstract The relict moraines in Argentine Patagonia archive major expansions of the Patagonian Ice Sheet throughout the Quaternary, and are one of the few terrestrial climate proxies in the middle latitudes of the Southern Hemisphere...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 01 September 2011
GSA Bulletin (2011) 123 (9-10): 1679-1698.
...Julie C. Fosdick; Brian W. Romans; Andrea Fildani; Anne Bernhardt; Mauricio Calderón; Stephan A. Graham Abstract The kinematic evolution of the Patagonian fold-and-thrust belt and cogenetic Magallanes retroarc foreland basin is reconstructed using new geologic mapping, two-dimensional (2-D) seismic...
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Journal Article
Journal: Geology
Published: 01 December 2003
Geology (2003) 31 (12): 1081-1084.
... to the southwest on the Argentinean side of the Magallanes basin ( Biddle et al., 1986 ). Potential sediment sources to the north and west in the Patagonian Andes are not very well studied because of the complexity of the Andean belt and partial cover by glacial ice. A Late Jurassic arc has been postulated...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 01 September 2002
GSA Bulletin (2002) 114 (9): 1159-1173.
... of widespread glaciation. This proposal is also supported by the excellent correlation between several topographic characteristics and the late Cenozoic ELA (e.g., Brozovic et al., 1997 ). The present-day ELA of the North Patagonian ice field at ∼47°S varies from 1200 m on its western side to 1350 m on its...
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Journal Article
Journal: Geosphere
Published: 27 October 2017
Geosphere (2017) 13 (6): 1973-1992.
...Claudia B. Zaffarana; Rubén Somoza; Darío L. Orts; Roberto Mercader; Bárbara Boltshauser; Víctor Ruiz González; Carla Puigdomenech Abstract The Central Patagonian batholith (CPB) comprises two Late Triassic calcalkaline plutonic suites (the Gastre superunit of 221 ± 2 Ma and the Lipetrén superunit...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2005
GSA Bulletin (2005) 117 (11-12): 1596-1614.
... of the Patagonian ice cap (Fig. 4) . The Zapata Formation is an uniformly thin-bedded (20–50 cm) dark shale from west to east, with bedding laterally continuous even where the formation is tectonized ( Figs. 7A and 8A ). The Zapata Formation sits directly on pillow basalt of the Sarmiento Ophiolite...
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Series: GSA Field Guide
Published: 01 January 2008
DOI: 10.1130/2008.0013(01)
EISBN: 9780813756134
... Valentin massif (4078 m), the highest peak in the Patagonian Cordillera. The Cretaceous Patagonian Batholith underlies these peaks, and the high topography supports the Northern Patagonian Ice Cap. There are also superb vistas looking southwest across Lago General Carrera. Near Puerto Murta...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2004
GSA Bulletin (2004) 116 (3-4): 434-450.
...Brad S. Singer; Robert P. Ackert, Jr.; Hervé Guillou Abstract During the Pleistocene, east of Lago Buenos Aires, Argentina, at 46.5 °S, at least 19 terminal moraines were deposited as piedmont glaciers from the Patagonian ice cap advanced onto the semi-arid high plains adjacent to the southern...
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Journal Article
Journal: Geology
Published: 01 May 2008
Geology (2008) 36 (5): 359-362.
..., similar to an interpretation of Lamy et al. (2004) for [Fe] marine records of Patagonian Ice Sheet behavior (see the Data Repository for further discussion). This interpretation is supported by observations of modern ice cap retreat from the Little Ice Age when the major flux of sediment to the ocean...
FIGURES
Series: Geological Society, London, Memoirs
Published: 01 January 2016
EISBN: 9781862397088
... Glacimarine processes affect about 20% of the global ocean today, and this area expanded considerably under cyclical full-glacial conditions during the Quaternary (Fig. 1 ) ( Dowdeswell et al. 2016 b ). Many of the submarine landforms produced at the base and margin of past ice sheets remain...
Series: Geological Society, London, Special Publications
Published: 01 January 2013
DOI: 10.1144/SP381.1
EISBN: 9781862396401
... Abstract This study of landscape evolution presents both new modern and palaeo process-landform data, and analyses the behaviour of the Antarctic Peninsula Ice Sheet through the Last Glacial Maximum (LGM), the Holocene and to the present day. Six sediment-landform assemblages are described...
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Journal Article
Journal: Geology
Published: 01 September 2012
Geology (2012) 40 (9): 859-862.
.... , 2004 , Antarctic timing of surface water changes off Chile and Patagonian Ice Sheet response : Science , v. 304 , p. 1959 – 1962 , doi:10.1126/science.1097863 . Lemieux-Dudon B. Layo E. Petit J.R. Waelbroeck C. Svensson A. Ritz C. Barnola J.M. Narcisi B.M...
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... During the Pleistocene only the Argentine Cordillera was glaciated. Thus the hypothesis for an ice sheet in the extra-Andean arid zone is to be considered completely without foundation. The maximum glaciation of the Cordillera was probably the late Pleistocene (Würm, Wisconsin) and has almost...
Journal Article
Journal: Geology
Published: 01 July 2012
Geology (2012) 40 (7): 631-634.
..., adjacent to the Southern Patagonian Ice Field at 50°S. We demonstrate that the beginning of ice retreat from the local last glacial maximum occurred at 19.7 ± 1.1 ka, with significant retreat commencing at 18.9 ± 0.4 ka, concurrent with glacier retreat elsewhere in southern Patagonia and New Zealand...
FIGURES
Series: GSA Field Guide
Published: 01 January 2016
DOI: 10.1130/2016.0041(01)
EISBN: 9780813756417
... (Argentina) emanated from the Patagonian Ice Sheet, and other Patagonian megaflooding occurred on the Chilean side. In Eurasia, the megaflooding from the margins of the Fennoscandian Ice Sheet spilled through the English Channel ( Gupta et al., 2007 ). In the mountain areas of central northern Asia...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2012
GSA Bulletin (2012) 124 (11-12): 1750-1761.
...J.A. Dowdeswell; E.M.G. Fugelli Abstract Grounding-zone wedges form where halts of decades to centuries during ice-sheet retreat across polar shelves allow sediment buildup at the grounding zone through delivery of deforming basal debris from fast-flowing ice streams. Thirty grounding-zone wedges...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2004
GSA Bulletin (2004) 116 (3-4): 308-321.
.... We present new in situ cosmogenic 10 Be, 26 Al, and 3 He exposure ages, supported by limiting 40 Ar/ 39 Ar and 14 C ages, for seven of the youngest moraines east of Lago Buenos Aires, Argentina, 46.5°S, that were deposited by a large outlet glacier of the Patagonian Ice Cap. Following a major...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2016
GSA Bulletin (2016) 128 (5-6): 1000-1023.
... Patagonia (∼46.5°S). Regional averages are three times higher for the Patagonian areas than the Antarctic Peninsula areas. This trend is interpreted to result from a general decrease in temperature and water availability at the ice-bedrock interface. For the Antarctic Peninsula study sites, erosion rates...
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Journal Article
Journal: GSA Bulletin
Published: 05 December 2017
GSA Bulletin (2017) 130 (5-6): 975-998.
...Annette Süssenberger; Susanne T. Schmidt; Klaus Wemmer; Lukas P. Baumgartner; Bernard Grobéty Abstract K-Ar dating on synkinematically formed illite in low-grade metamorphic pelites was used to set new time constraints on the development of the Patagonian retroarc fold-and-thrust belt caused...
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Series: Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2005.242.01.09
EISBN: 9781862394902
... showing the location of temperature profiles in Fig. 5 and the results of the bathymetric survey (Haresign et al . unpublished). The baseline used for the ice velocity survey is also indicated. Map based on 1:100,000 series of the Chilean Instituto Geográflco Militar, sheets 162 and 278, and 1974...
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