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Mostrando ítems 31-40 de 43
Hojas Geológicas 2969-18 y 2969-24 Famatina y Sañogasta
(Servicio Geologico Argentino. Instituto de Geología y Recursos Minerales, 2011-11)
La región de Famatina se caracteriza por su imponencia al constituir un conjunto de elevaciones prominentes sobre el nivel de base del área circundante, y que ininterrumpidamente se extienden entre las latitudes S27º y ...
Patagonia-Antarctica Early Paleozoic conjugate margins: Cambrian synsedimentary silicic magmatism, U-Pb dating of K-bentonites, and related volcanogenic rocks
(Elsevier Science, 2018-11)
This study describes the stratigraphic features, petrology and geochemistry and geochronology constraints of K-bentonites, ignimbrites and related volcanogenic rocks interbedded in the marine sedimentary sequence of the ...
Thermochronology of the Ventana Ranges and Claromecó Basin, Argentina: Record of Gondwana breakup and South Atlantic passive margin dynamics
(Pergamon-Elsevier Science Ltd, 2021-01)
The Ventana Ranges and the neighboring Claromecó basin display multiple extensional and compressional tectonic events throughout their Phanerozoic evolution. A passive continental margin setting during the early Paleozoic ...
Acritarchs of Las Ventanas Formation (Ediacaran, Uruguay): Implications for the timing of coeval rifting and glacial events in western Gondwana
(Elsevier Science, 2008-07)
Acritarchs and other organic-walled microfossils occurring in siltstones of the Las Ventanas Formation (Quebrada de Viera and El Perdido members) are systematically described and illustrated. The assemblage includes the ...
Geological factors and evolution of southwestern Gondwana Triassic plants
(Elsevier Science, 2003-03)
A synergistic model based on reciprocal influences between biotic and abiotic factors is developed for the Triassic of southwestern Gondwana. Changes in physical environment exerted a strong influence on the characteristics ...
Variability of continental depositional systems during lowstand sedimentation: an example from the Kimmeridgian of the Neuquén Basin, Argentina
(Asociación Argentina de Sedimentología, 2007-12)
En la sucesión jurásico-cretácica de la Cuenca Neuquina se reconocen varias cuñas de mar bajo que se distinguen por el desarrollo de depósitos continentales y marinos someros en los sectores más distales de la cuenca, ...
The role of the slab pull force in the late Oligocene to early Miocene extension in the Southern Central Andes (27°-46°S): Insights from numerical modeling
(Pergamon-Elsevier Science Ltd, 2018-02)
Although extensional deformation plays a significant part of Andean history, the causes behind its driving mechanisms and its impact throughout the geological record remain controversial. Through the aid of numerical ...
The Choiyoi volcanic province at 34°S-36°S (San Rafael, Mendoza, Argentina): Implications for the Late Palaeozoic evolution of the southwestern margin of Gondwana
(Elsevier Science, 2009-08)
The Choiyoi rhyolitic province of Chile and Argentina (23°S-42°S) was emplaced at the SW margin of Gondwana during the Permian. The San Rafael Massif (Mendoza, Argentina, 34°-36°S), is a key area to analyse the relative ...
Mantle derived crystal-poor rhyolitic ignimbrites: Eruptive mechanism from geochemical and geochronological data of the Piedra Parada caldera, Southern Argentina
(Elsevier Science, 2017-12)
Trace elements, isotopic modeling and U-Th-Pb SHRIMP zircon age constraints are used to reconstruct the eruption history and magmatic processes of the Piedra Parada Caldera. In the early Eocene, the crystal-poor Barda ...
Modelo de sedimentación continental para el rift cretácico de la Argentina central: Ejemplo de la sierra de las Quijadas, San LuisModel of continental sedimentation for the Cretaceous Central Argentinean rift: example from Las Quijadas hill, San Luis province
(Asociación Geológica Argentina, 2005-12)
En este trabajo se estudian las sedimentitas continentales cretácicas (Grupo del Gigante) en la sierra de las Quijadas, ubicada en el noroeste de la provincia de San Luis. La información se obtuvo mediante el relevamiento ...