The Sierra de las Quijadas National Park (Spanish: Parque Nacional Sierra de las Quijadas) is a national park located in the northwestern part of the Argentine province of San Luis. It was established on December 10, 1991, to protect the natural features, representative of the Semiarid Chaco and the High Monte ecoregions. Geology Sierra de las Quijadas is located in the San Luis Basin, whose surface is composed of sedimentary, metamorphic, and igneous outcrops of various ages. The basin is bound…