Cerro Overo

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 23.52°S
  • 67.67°W

  • 4555 m
    14940 ft

  • 355097
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Cerro Overo.

The Global Volcanism Program has no Weekly Reports available for Cerro Overo.

The Global Volcanism Program has no Bulletin Reports available for Cerro Overo.

The Global Volcanism Program is not aware of any Holocene eruptions from Cerro Overo. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Cerro Overo page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

The Global Volcanism Program has no synonyms or subfeatures listed for Cerro Overo.

Photo Gallery


Colachi (left) is an andesitic-dacitic stratovolcano whose most recent activity produced pristine silicic lava flows of probable Holocene age. The largest of these covers a 7 sq km area on the saddle between Colachi and the neighboring volcano of Acamarachi (center horizon). This aerial view from the west also shows the conical peak of Aguas Calientes (far right), a twin volcano of Lascar volcano, whose slopes appear at the lower right. The Talabre valley in the center foreground is partially filled by an andesitic lava flow from Lascar.

Photo by Insitituto Geográfico Militar, courtesy of Oscar González-Ferrán (University of Chile).
See title for photo information.
Cerro Overo maar in the foreground was formed by phreatomagmatic explosions. A thin, roughly 1.5-m-thick, dark-colored ejecta blanket surrounds the 600-m-wide, 80-m-deep maar. The maar is located on the lower NE flank of Volcán Chiliques and was erupted along a regional fault through basement ignimbrites of Pliocene age from the La Pacana caldera. On the horizon to the right is the east side of Tumisa and the dome "Negro de Barriales." On the left is the Lejia stratovolcano and caldera. Laguna Agua Caliente is at the right-center.

Photo by Instituto Geográfico Militar (courtesy of Oscar González-Ferrán, University of Chile).
See title for photo information.

Smithsonian Sample Collections Database


There are no samples for Cerro Overo in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites