Results 141 to 150 of about 3,572 (168)

Vegetational changes during the Holocene in Extra-Andean Patagonia, Santa Cruz Province, Argentina

Palaeogeography, Palaeoclimatology, Palaeoecology, 1998
Abstract Modern pollen-vegetation relationship was used in the interpretation of stratigraphical sequences from two archeological sites, La Martita cave (48°24′S, 69°15′W) and Alero Cardenas (47°18′S, 70°26′W) located in Extra-Andean Patagonia in the Santa Cruz Province.
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Chronostratigraphy and compositional characteristics of miocene volcanism in the Sierra de Pire Mahuida, extra-Andean Patagonia, Argentina

Journal of South American Earth Sciences
Fil: Salani, Flavia Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de
Salani, Flavia Maria, Schneider Santos, Joao O.   +1 more
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Hydrochemistry, isotope studies and salt formation in saline lakes of arid regions: Extra-Andean Patagonia, Argentina

Science of The Total Environment, 2022
The most favourable locations for the development of saline lakes are in the rain-shadow of mountain ranges, which provide large areas of precipitation catchment while the base of the basin is under arid climate and exposed to evaporation. These conditions are found in Extra-Andean Patagonia under the rain-shadow generated by the Andean cordillera ...
Alvarez, Maria del Pilar, Carol, Eleonora Silvina, Eymard, Inés, Bilmes, Andrés, Ariztegui, Daniel   +4 more
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Change of eruptive style during Pliocene deglaciation: from scoria cones to lava shields in southern extra-Andean Patagonia, Argentina

Bulletin of Volcanology, 2021
Slab window basalt cycles in extra-Andean Patagonia formed in a main-plateau and a post-plateau stage, during glacial and interglacial events. Here, we provide field, geochemical and geochronological data of Pliocene basalts and volcanoes from the north of Viedma lake (49° 20′–49° 30′ S).
Mauricio González Guillot, Juan Federico Ponce   +1 more
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Late Pleistocene palaeolakes in the Andean and Extra-Andean Patagonia at mid-latitudes of South America

Quaternary International, 2002
Abstract Late Pleistocene palaeolakes on the eastern side of Andes (glacial lakes) and in the Patagonian Steppe (pluvial lakes) along 41°S latitude were studied. Natural dams (glaciers, moraines) that maintained a high water level in glacial palaeolakes were melted or cut by erosion during Late Pleistocene climate amelioration.
Andrzej Tatur, Rodolfo del Valle, Maria-Martha Bianchi, Valeria Outes, Gustavo Villarosa, Jerzy Niegodzisz, Guillaume Debaene   +6 more
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Late Cenozoic Geohydrology of Extra-Andean Patagonia, Argentina

2008
Publisher Summary This chapter focuses on the role played by Late Cenozoic rocks and sediments of continental extra-Andean Patagonia in the geohydrological processes. They act not only as carriers of usable underground water but mainly as participant in recharge mechanisms to other formations of older age as well as support for highly fragile ...
Mario A. Hernández, Nilda González, Lisandro Hernández   +2 more
openaire   +1 more source

Fossil pollen from Los Toldos locality: A record of the Late-glacial transition in the Extra-Andean Patagonia

Quaternary International, 1999
Abstract Paleoenvironmental changes during the Late-glacial transition are interpreted from a pollen record from two caves at Los Toldos (47°22′S; 68°58′W) in Extra-Andean Patagonia in Argentina. The paleoenvironmental interpretation is based on changes in the ratio between shrub and grass steppe taxa and on comparison with other pollen records from ...
M.M. Paez, A.R. Prieto, M.V. Mancini
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When tableland flows: flow-type landslides in the extra-Andean Patagonia

Landslides in volcanic and sedimentary tablelands rank among the largest mass movement phenomena globally, yet their spatial patterns and prevailing mechanisms remain insufficiently investigated. Our landslide inventory, covering 517,000 km² of volcanic tableland in extra-Andean Patagonia, provides insight into the spatial distribution of ...
Jakub Kilnar, Tomáš Pánek, Michal Břežný, Diego Winocur   +3 more
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Legume Diversity in the Extra Andean Patagonia

2012
Patagonia is one of the few cold temperate semiarid regions of the world. This territory extends from latitude 40 to 55 ֯ and from the Atlantic Ocean to the Andean piedmont in the west, and occupies nearly 786.000 km2 in the southern portion of Argentina.
Stronati, Monica Susana, Brevedan, Roberto, Busso, Carlos Alberto   +2 more
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Carbonate Mineralization Related to Weathering of Mafic and Ultramafic Rocks in the Pali Aike Volcanic Field, Extra-Andean Patagonia, Chile

On geological timescales, the volume of CO2 in the atmosphere is influenced by processes such as silicate weathering. In particular, the weathering of basaltic rocks increase the availability of divalent cations such as Mg2+ and Ca2+ in natural waters enabling carbonate formation under atmospheric conditions.
Carolina Henriquez, Mauricio Calderon Nettle, Leonardo Cury, Paulo Quezada, Anelize Bahniuk   +4 more
openaire   +1 more source