Abstract

DEL PAPA, C.E.; HONGNI, F.D.; PETRINOVIC, I.A.  and  DOMINGUEZ, R.. Evidence of pre-Middle Miocenedeformation associated with the Andean foreland of the Eastern Cordillera (24°35´ S - 66°12´ W). Rev. Asoc. Geol. Argent. [online]. 2004, vol.59, n.3, pp.506-509. ISSN 0004-4822.

An angular unconformity between Paleogene post-rift strata (Salta Group) and the synorogenic Andean record (Payogastilla Group) is described in the northernmost Calchaquí valley. Stratigraphical and structural studies lead to its interpretation as representing a pre-Middle Miocene deformation event which could represent one of the earliest stages in the Central Andean foreland evolution in the southern area of the Eastern Cordillera of north-western Argentina.

Keywords : Andean foreland; Payogastilla Group; Valle Calchaquí; Cordillera Oriental; Northwest Argentina.

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