The symmetrical Cerro Peinado stratovolcano in Argentina is the source of well-preserved Holocene lava flows from summit and flank vents (de Silva and Francis, 1991). The upper part of the cone is covered by pyroclastic material. Possible pyroclastic-flow lobes extend to the NW and N. An apron of pristine lava flows that extends to 6 km were erupted from the main cone and from flank vents, including a prominent ESE-flank vent. It is surrounded by small fields of older cinder cones, maars, and lava flows, located along N-S-trending faults, which are related to the Salar de Antofalla and Antofagasta volcanic fields.