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Ricardo A. Astini,Federico Martina,Federico M. Davila
Pág. 245 - 267
In the northern part of the Argentine Precordillera, northwestern La Rioja, the Upper Paleozoic is over 4,000 m thick. Very coarse conglomerates from the basal section have not been described nor adequately interpreted. This work analyses this unit in th...
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Gilda Collo,Ricardo A. Astini,Agustin Cardona,Margarita D. Do Campo,Umberto Cordani
Pág. 191 - 214
Many of the metamorphic and deformational events associated to low-grade units in NW Argentina have been linked with ancient orogenies, like the Pampean (Cambrian) and the Ocloyic (Ordovician) cycles. The lack of specific ages in the low-grade metamorphi...
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Miguel Ezpeleta,Ricardo A. Astini,Federico Davila
Pág. 253 - 278
In the Famatina belt, western Argentina, a -400 m thick conglomerate succession is extensively developed and has been previously considered as the uppermost section of a postglacial interval (late Pennsylvanian) of the Paganzo Group. Here we separate it ...
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Ricardo A. Astini,Larisa F. Marengo
Pág. 247 - 276
The best and most complete palynologically constrained Ordovician section across the Sierras Subandinas crops out in the southern part of the Sierra de Zapla along the Capillas River (Subandean Ranges, Jujuy Province). The dominantly marginal marine sett...
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Fernando J. Gomez,Ricardo A. Astini
Pág. 19 - 46
The La Laja Formation is a key unit regarding the hypothesis of the Argentine Precordillera as a Laurentia-derived allochtonous terrane in the south central Andes. Together with the Cerro Totora Formation it comprises the oldest unit exposed at the base ...
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Federico M. Davila,Ricardo A. Astini
Pág. 187 - 204
The sedimentary history and uplift evolution of the Famatina System, Central Andean broken foreland, is poorly known. Within its central region a thick Cenozoic synorogenic stratigraphic succession ('Calchaquence') is exposed, including Early Miocene to ...
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Ricardo A. Astini,Federico M. Davila
Pág. 241 - 254
The new denomination of Cerro Morado Group is proposed for a thick volcanosedimentary succession (727 m) that unconformably overlies the Early Ordovician Famatina Group in the central region of the Sierra de Famatina, Andean foreland of western Argentina...
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