The exhumation of the Northern Patagonian Massif Gondwana Planation surface due to uprising during the Oligocene

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The altiplano (or high plain) of the Northern Patagonian Massif is a large, 100,000 km2 geomorphological unit that rose from sea level to at least 1,200 metres above sea level (m a.s.l.) in Early Oligocene times, as a consequence of epeirogenic uplift. This uniform tableland feature is essentially a...

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Detalles Bibliográficos
Autores principales: Aragón, Eugenio, Aguilera, Emilia Yolanda, Cavarozzi, Claudia Ernestina, Ribot, Alejandro Mario, Rabassa, Jorge, Ollier, Cliff
Formato: Libro Capitulo de libro
Lenguaje:Inglés
Publicado: Springer, Dordrecht 2014
Materias:
Geología
Altiplano
Patagonia
Plateau
Planation surface
Basalts
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127383
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:The altiplano (or high plain) of the Northern Patagonian Massif is a large, 100,000 km2 geomorphological unit that rose from sea level to at least 1,200 metres above sea level (m a.s.l.) in Early Oligocene times, as a consequence of epeirogenic uplift. This uniform tableland feature is essentially a Cretaceous planation surface carved on Paleozoic igneous and metamorphic rocks of the Northern Patagonian Massif. This planation surface had been preserved by a thin and scattered cover of Maastrichtian-Danian marine sediments and Late Oligocene-Early Miocene basaltic flows. Erosion since Middle Miocene times at this tableland has exposed much of the Gondwana planation surface and developed numerous basaltic plateaus by relief inversion.

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