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995  Articles
1 of 101 pages  |  10  records  |  more records»
The end of the Permian period is marked by global warming and the biggest known mass extinction on Earth. The crisis is commonly attributed to the formation of large igneous provinces because continental volcanic emissions have the potential to control at... see more

Triassic rock units of northern Chile (28-29° S) record the transition, both in time and space, between two major orogenies that affected the southwestern margin of South America, the Gondwanian and Andean orogenies. The geodynamic configuration of the ma... see more

The El León pluton, located in the Cordón de Lila in the Precordillera of the Antofagasta region, Chile, is an intrusive body emplaced in the famatinian magmatic arc in the southwestern margin of Gondwana during the Darriwilian (Middle Ordovician). It has... see more

The Rinconada Formation is a mélange that crops out in the eastern margin of the Argentine Precordillera, an exotic terrane accreted to Gondwana in Ordovician times. Its gravity-driven deposits have been studied by means of conodont and graptolite biostra... see more

U-Pb zircon geochronological data provide record of about 130 Ma of igneous activity in the Andes of northern Chile, which extended episodically from the latest Early Carboniferous to Early Jurassic (328-194 Ma). The overall U-Pb data show that volcanism ... see more

The Bahía Mansa Metamorphic Complex (BMMC) consists of pelitic schists, metagreywackes, oceanic type mafic metavolcanics, and minor proportion of tectonically emplaced mafic and ultramafic bodies, mylonites to ultramylonites and rare trachytic intrusive b... see more

RESUMEN. El Complejo Piedra Santa es una unidad metamorfica de baja a intermedia gradiente P/T que forma parte del basamento premesozoico del area norpatagonica occidental, en la provincia de Neuquen (Argentina). Consiste en una secuencia derivada princip... see more

The Upper Cretaceous Bauru Basin developed in the south-central part of the South American Plate resulting from the thermo-mechanical subsidence processes which followed the break-up of Gondwana and the opening of the Southern Atlantic Ocean (Figs. 1 to 3... see more

The metamorphic complex of Sierra de Los Llanos is composed of low- to high-grade metasedimentary rocks, namely phyllites, schists, gneisses and migmatites that out crop like large septa within lower Ordovician magmatic units. Cornubianite associated with... see more

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