Abanicos aluviales y ríos asociados en los depósitos volcaniclásticos cretácicos del Miembro Las Plumas, Cuenca de Somuncurá-Cañadón Asfalto, Argentina

VILLEGAS, P.M.; UMAZANO, A.M.; MELCHOR, R.N.

Tucumán

Congreso; XX Congreso Geológico Argentino; 2017

Asociación Geológica Argentina

The volcaniclastic deposits of the Las Plumas Member (Cretaceous, Somuncurá- Cañadón Asfalto basinBasin) were studied to document the relationship between alluvial fans and related streams in a marginal basin setting. Four facies associations were defined in the study region: proximal alluvial fan (AF1), medial alluvial fan (AF2), fluvial channel belts (AF3) and floodplain deposits (AF4). The succession was divided into three informal sections which show the palaeo-environmental evolution from a fluvial system developed in over a volcanic relief to an alluvial fan and laterally associated rivers.