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  Google Earth Placemark with Features
  • Argentina
  • South America
  • Lava dome(s)
  • Unknown - Evidence Uncertain
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 37.738°S
  • 70.906°W

  • 2360 m
    7741 ft

  • 357081
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Trolon.

The Global Volcanism Program has no Weekly Reports available for Trolon.

The Global Volcanism Program has no Bulletin Reports available for Trolon.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Uncertain

2360 m / 7741 ft


Volcano Types

Lava dome(s)
Pyroclastic cone

Rock Types

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone
Continental crust (> 25 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

Trolon (also called Trocon) volcano lies in Argentina NE of the Caldera del Agrio, and is grouped here together with the Cerro Bayo cone, 10 km ESE. This dacitic-andesitic lava-dome complex has two summit craters and a pyroclastic cone that fed andesitic lava flows that traveled to the east. González-Ferrán (1995) estimated an age of Pleistocene-Holocene.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.

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

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.




Feature Name Feature Type Elevation Latitude Longitude
Bayo, Cerro Stratovolcano 2360 m 37° 45' 38" S 71° 0' 56" W
Trolon, Sierra Stratovolcano 2505 m 37° 44' 17" S 70° 54' 22" W

Photo Gallery

The small snow-free crater at the upper right, above and to the right of the light-colored area just right of the center of this NASA International Space Station image (with north to the upper left) is Trocon volcano. Trocon lies in Argentina NE of the Caldera del Agrio (lower right), whose floor contains several lakes, including the U-shaped one at lower right near the SE caldera wall. Trocon is a lava-dome complex with two summit craters and a pyroclastic cone. Snow-covered Callaqui volcano (bottom left-center) overlies the western rim of Caldera del Agrio.

NASA Space Station image ISS006-E-39998, 2003 (

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of Trolon Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.