Volcán Incahuasi

Nevado de Incahuasi is a complex volcanic massif that straddles the Chile-Argentina border ENE of Nevados Ojos del Salado volcano. Two stratovolcanoes occupy a compound 3.5-km-wide caldera, and Pleistocene lava domes are located on the W and SW flanks. The youngest stratovolcano is capped by a 1-km-wide crater, and dacitic lava flows radiate down the flanks. The fresh-looking morphology of the youngest products suggest a Holocene (González-Ferrán, 1995) or possible Holocene (de Silva 2007, pers. comm.) age. A dacitic lava dome partially fills an arcuate crater on the E flank of Incahuasi (which means "House of the Inca" in Quechua). Four pyroclastic cones are located 7 km to NE and produced basaltic andesite lava flows that cover an area of 10 km2.