Multiple glaciations of the Cordon del Plata, Mendoza, Argentina

Wayne, William J.; Corte, Arturo E.

doi:10.1016/0031-0182(83)90044-5

Cited by 14 publications

(26 citation statements)

References 22 publications

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“…All of these tectonic geomorphology studies describe fault scarps that affect piedmont deposits and several geomorphic indices that reflect the continuity of tectonic activity during the Quaternary. The youngest piedmont deposits affected by Quaternary tectonic activity are correlated locally with 0.1 -0.2 Ma Vallecitos till (Wayne & Corte 1983) and regionally with the Las Tunas Formation (Polanski 1963). Casa et al (2010) named the eastern principal fault of the La Carrera system as the Río Blanco fault and described a diverging splay that juxtaposes Miocene sedimentary rocks of the Mariño Formation over Plio-Pleistocene rocks of the Mogotes Formation.…”

Section: La Carrera Fault Systemmentioning

confidence: 99%

“…Considering the evidence of activity of this fault between the deposition of the Asociación Piroclástica Pumicea and undeformed morraines dated at 0.1-0.2 Ma (Wayne & Corte 1983) and the height of the El Salto fault scarp near the Blanco river, Casa (2005) calculated a minimum mean uplift rate of 0.51 mm a 21 . Recent age data of a tuff in the Las Tunas river, correlated with the pyroclastic association at 0.6 + 0.2 Ma (Pepin 2010;Pepin et al 2013), indicate a minimum uplift rate of 0.34 mm a 21 .…”

Section: La Carrera Fault Systemmentioning

confidence: 99%

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Quaternary tectonics and seismic potential of the Andean retrowedge at 33–34°S

García

Casa

2014

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The Andean retrowedge, located between 338S and 348S, lies in the transition region of the Pampean flat-slab subduction zone to the north and a normal subduction zone to the south. Neotectonic structures and shallow seismicity are very common north of this segment and become progressively less frequent southwards. The Frontal Cordillera and the Cerrilladas Pedemontanas are the main morphostructures involved in the Quaternary deformation of this region. The Frontal Cordillera is a thick-skinned fold-and-thrust belt uplifted since Late Miocene time. The Cerrilladas Pedemontanas are low-relief hills that represent the mild inversion of the Cuyo Triassic rift depocentre since Pliocene time. Middle Miocene-Holocene synorogenic strata cover the Cuyo basin and surrounding foreland areas. The Quaternary tectonic evolution of this area has been established through integration of new data from fieldwork in the Frontal Cordillera piedmont with subsurface information and previously published data. Mean Late Pleistocene uplift rates ranging between 0.21 and 0.92 mm a 21 and earthquake minimum moment magnitudes (M w ) of c. 6.4-6.7 have been estimated for the morphostructural units analysed in this manuscript.

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Section: La Carrera Fault Systemmentioning

confidence: 99%

Section: La Carrera Fault Systemmentioning

confidence: 99%

Quaternary tectonics and seismic potential of the Andean retrowedge at 33–34°S

García

Casa

2014

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“…Clapperton (1983) describes a case in central Peru (see also Lliboutry, 1977) where heavy rockfalls have created a type of rock glacier, which then formed huge moraines 50 to 200 m tall, apparently as the result of several advances and retreats. These 'superposed' moraines are also found in the Alps (Rothlisberger and Schneebeli, 1979) and at 33°S in the Andes (Wayne and Corte, 1983).…”

mentioning

confidence: 91%

“…Jordan (1985) located 1775 glaciers >0.1 ha in size on aerial photographs of Bolivia; he suggested that though these were smaller than European glaciers, this was due to terrain differences, and not climate. Wayne and Corte (1983) stated that glaciers at 33°S in Argentina are very similar in appearance to central Andean glaciers, although they made no quantitative comparisons. Glacier types other than valley and mountain glaciers are present in equatorial regions: rock glaciers (Lliboutry, 1977;Mahaney, 1980) and ice caps (Thompson, 1980).…”

mentioning

confidence: 96%

The tropical Andes as a morphoclimatic zone

Young

1989

Progress in Physical Geography: Earth and Environment

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Tropical highlands have often been classified together in a morphoclimatic zone in geomorphology, based primarily on small annual, yet large diurnal, temperature changes (Troll, 1968). Three high elevation equatorial regionsNew Guinea, East Africa, and the north and central Andes -have landforms shaped by glacial and periglacial processes. Because of the apparent distinctiveness of the climate there, various authors have suggested that these areas be separated from arctic and temperate alpine areas (Lorenzo, 1969;Tricart, 1970; Tricart and Cailleux, 1973; and Karte, 1979). Latitudinal zonation can only crudely be equated with that due to altitude; as shown by Tricart and Cailleux (1973), this oversimplification disregards fundamental differences in diurnal temperatures, in precipitation zonation, and in general slope steepness. Troll (1944;1959;; as cited in Budel, 1982) distinguished equatorial highlands from high latitude regions by virtue of the fact that annual cycles of cryoturbation and gelifluction in the latter are replaced by daily cycles in the former, usually of needle-ice formation, which implies erosional processes acting fairly superficially in the upper soil layers. Lorenzo (1969) suggested that periglacial processes at high elevations in Mexican volcanoes are limited in intensity and area affected, and were also probably limited in the past, even during glacial stades; these processes are the result of daily climatic changes, rather than seasonal ones. Tricart (1970) separated equatorial regions from other cold regions and characterized them as having frequent, often diurnal, frost action, associated with relatively little penetration into the soil and with little wind action. The principal result is soil movement by needle-ice formation, although small stone polygons, stone stripes, and cryoturbation steps can also form.Washburn (1973) makes these same points, but in addition provides (pp. 240-43) a checklist of the relative importances of periglacial processes and features likely to occur in different morphoclimatic regions, one of which is that of equatorial highlands. Briefly, the processes proposed to be important near the equator are frost creep, nivation, frost wedging, wind action, and, to a lesser extent, frost heaving and thrusting, and rock-glacier creep. Common features are small, sorted or non-sorted stone polygons, stone stripes, small gelifluction lobes, at UNIV OF MONTANA on April 5, 2015 ppg.sagepub.com Downloaded from 14 talus and protalus ramparts, while also occasionally present are bedded slope deposits of pebbles and finer deposits (grèzes litées), nivation benches and hollows, loess, ventifacts, block fields and slopes, rock glaciers and permafrost. Finally, Karte (1979; as cited in Chorley et al. , 1984: 500-502) proposed two graphical models summarizing many of these same ideas. Equatorial highlands were characterized by diurnal freezing and thawing, which results in relatively small sorted and gelifluction features, usually associated with little vegetation cover.In th...

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“…At the same time revision of global glaciation epochs continues. The genesis of chaotic deposits corresponding to debris flows developed in alluvial fans of the Frontal Cordillera piedmont (Polanski 1958) was reinterpreted as moraines promoting the existence of four glaciations along the Rio Blanco river in Argentina (Wayne & Corte 1983).…”

mentioning

confidence: 99%

Megalandslides in the Andes of central Chile and Argentina (32°–34°S) and potential hazards

Moreiras

Sepúlveda

2014

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This review deals with an integration and update of the knowledge about large-volume landslides in the Central Andes at 32-348S. An integrated landslide inventory for megalandslides in central Chilean and Argentinean Andean basins was developed, and dispersed chronological data on palaeolandslides were compiled, showing a dominance of Late Pleistocene and Holocene ages. Traditional hypotheses adopted for explaining landslide occurrence in the Central Andes are contrasted. Whereas seismic tremors have been widely suggested as the main triggering mechanism in Chilean collapses, palaeoclimatic conditions are considered as the main cause of Argentinean giant landslides. These different approaches denote the lack of multidisciplinary studies focused on the controversy about seismic or climate trigger mechanisms in the Central Andes. These studies are also essential to understand failure mechanisms and assessment of the related hazard and risk, which are essential to reduce social and economic impacts on vulnerable communities from future landslide events.

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Multiple glaciations of the Cordon del Plata, Mendoza, Argentina

Cited by 14 publications

References 22 publications

Quaternary tectonics and seismic potential of the Andean retrowedge at 33–34°S

Quaternary tectonics and seismic potential of the Andean retrowedge at 33–34°S

The tropical Andes as a morphoclimatic zone

Megalandslides in the Andes of central Chile and Argentina (32°–34°S) and potential hazards

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