Bajada del Diablo Impact Crater-Strewn Field (Argentina): ground magnetic and electromagnetic surveys

PREZZI, CLAUDIA BEATRIZ; MARÍA JULIA ORGEIRA; ACEVEDO, ROGELIO; PONCE, FEDERICO; MARTÍNEZ, OSCAR; CARLOS VÁSQUEZ; CORBELLA, HUGO; GONZÁLEZ, MAURICIO; RABASSA, JORGE

Mar del Plata

Congreso; Geosur 2010 International Geological Congress on the Southern Hemisphere; 2010

Bajada del Diablo impact crater field is located in the Northern Patagonian Massif, Chubut, Argentina. Impact craters have been identified on two rock types: the Quiñelaf Eruptive Complex and Pampa Sastre Formation. Most of the rocks forming the Quiñelaf Eruptive Complex have been classified as trachytes, but other rocks are present, such as rhyolites, trachyandesites, trachybasalts, and pyroclastic rocks. Pampa Sastre Formation corresponds to conglomerate layers with basalt clasts boulder and blocks in size (up to 50 cm in diameter) in a coarse sandy matrix. The study area includes at least 66 impact craters found in Miocene olivine basalts of the Quiñelaf Eruptive Complex and in the Late Pliocene/Early Pleistocene Pampa Sastre conglomerate.