Mount Pissis

Mount Pissis
Name	Mount Pissis
Other name	Cerro Pissis
Elevation m	6795
Range	Andes
Location	Atacama Region, Argentina / Catamarca Province?
First ascent	1937

Mount Pissis is a high volcanic massif in the Andes of Argentina, notable for its high elevation, extinct stratovolcanic structure, and prominence within the Puna de Atacama. Situated in a remote sector of the Atacama Region and adjacent to Catamarca Province, it stands among the tallest volcanic summits in the Western Hemisphere, attracting interest from researchers associated with institutions such as the National University of La Plata, CONICET, and international teams from Smithsonian Institution and University of California, Berkeley.

Geography and Location

The mountain lies in the high plateau of the Puna de Atacama near the border with Chile, within a landscape shaped by nearby features like the Quebrada de Humahuaca, Salar de Antofalla, and the Atacama Desert. Access routes approach from towns including Antofagasta de la Sierra, Belén, Catamarca, and Fiambalá, and logistical bases often use airfields in Salta or Catamarca (city). Regional administrative divisions involve Provincia de Catamarca and Provincia de La Rioja, and the area is mapped by agencies such as the Instituto Geográfico Nacional (Argentina) and international projects like the US Geological Survey.

Geology and Formation

Pissis is part of a cluster of Neogene to Quaternary volcanic edifices in the Central Volcanic Zone of the Andes, related to subduction processes of the Nazca Plate beneath the South American Plate. Its construction involves dacitic to andesitic lava flows, pyroclastic deposits, and ignimbrites comparable to volcanic sequences studied at Licancabur, Llullaillaco, and Aconcagua. Tectonic influences from structures such as the Calama–Olacapato–El Toro fault system and regional uplift events documented by researchers at Universidad Nacional de Córdoba and Universidad de Chile contributed to its morphology. Geochronology using potassium-argon and argon-argon dating by teams including Geological Survey of Argentina and international collaborators has constrained eruptions to Miocene–Pliocene epochs, contemporaneous with deposits in the Altiplano-Puna volcanic complex.

Elevation, Glaciation and Climate

Pissis’s summit elevation has been variously reported by Instituto Geográfico Nacional (Argentina), expedition surveys, and satellite missions like NASA’s Shuttle Radar Topography Mission and ASTER. Glaciation on the massif is minimal compared with tropical Andean peaks such as Huascarán and Chimborazo, but late Pleistocene moraines and glacial trimlines correlate with records from Lake Titicaca basin studies and climate reconstructions by groups at Max Planck Institute for Chemistry and University of Bern. The hyperarid environment links to climatic drivers identified in paleoclimate work involving ENSO variability and proxies used by researchers at PAGES and NOAA.

Exploration and Climbing History

Early scientific reconnaissance was conducted by explorers associated with Alexander von Humboldt’s intellectual legacy, later followed by ascents linked to mountaineers organized from Club Andino and international alpine clubs like the Alpine Club (UK) and American Alpine Club. The first documented climb in 1937 involved Argentine alpinists recorded by national press and institutions including Museo de La Plata. Subsequent expeditions by climbers affiliated with Federación Argentina de Ski y Andinismo utilized bases in Fiambalá and logistical support from local guides from communities similar to those in Iruya and Susques. Modern ascents reference route information compiled by authors linked to American Alpine Journal and guidebooks from Lonely Planet and National Geographic.

Biodiversity and Ecology

The high-elevation ecosystems around the massif are characteristic of the Puna grassland and High Andean biomes, hosting fauna and flora documented by researchers from CONICET, Smithsonian Tropical Research Institute, and Pontifical Catholic University of Peru comparative studies. Species observed near puna wetlands and saline flats include vicuña, guanaco, and avifauna such as the flamingos studied in Salar de Atacama and Laguna Verde systems; plant assemblages feature shrubs and grasses comparable to those cataloged in the Andean bofedales. Conservation assessments reference frameworks developed by IUCN and region-specific programs by World Wildlife Fund and national protected area agencies.

Human Uses and Cultural Significance

Local indigenous and Hispano-Argentine communities in the Andes attribute cultural and ritual significance to high peaks, paralleling traditions documented for Aconcagua and Llullaillaco by anthropologists from National University of Córdoba and University of Buenos Aires. The mountain’s environs inform pastoralism, salt extraction near salar features, and scientific tourism promoted by regional development agencies and provincial governments including Gobierno de Catamarca Province and Gobierno de La Rioja Province. Archaeological surveys by teams from Museo Etnográfico and universities have identified ceremonial artifacts at high Andean sites similar to discoveries on Llullaillaco and Ampato, linking the massif to broader Andean archaeology narratives.

Category:Volcanoes of Argentina Category:Andes