San Pedro-Pellado

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  • Chile
  • South America
  • Stratovolcano(es)
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 35.989°S
  • 70.849°W

  • 3621 m
    11877 ft

  • 357062
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for San Pedro-Pellado.

The Global Volcanism Program has no Weekly Reports available for San Pedro-Pellado.

The Global Volcanism Program has no Bulletin Reports available for San Pedro-Pellado.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

3621 m / 11877 ft


Volcano Types

Pyroclastic cone(s)

Rock Types

Andesite / Basaltic Andesite
Basalt / Picro-Basalt

Tectonic Setting

Subduction zone
Continental crust (> 25 km)


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

Geological Summary

The San Pedro-Pellado volcanic complex (also known as San Pedro-Tatara) has been active from the Pliocene to the Holocene. The Tatara-San Pedro edifice overlies the deeply eroded Pellado stratovolcano; both were constructed within the 6 x 12 km Río Colorado caldera, which formed during an eruption about 0.5 million years ago. The Tatara basaltic-andesite shield volcano at the western end of the complex contains stacked sequences of up to 100 or more lava flows forming up to 1500 m of relief. The glacier-filled summit crater of the 3621-m-high dominantly andesitic San Pedro stratovolcano, which overlies the Tatara edifice, contains a young scoria cone that was the site of the most recent eruptions. A major Holocene E-flank debris avalanche filled the Río de la Puente valley to the south and was followed by eruptions originating within the avalanche scarp low on the east flank that produced lava flows down the Estero Pellado drainage. No historical eruptions have been recorded, but fumaroles are found SE of Pellado.


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

Costa F, Singer B, 2002. Evolution of Holocene dacite and compositionally zoned magma, Volcan San Pedro, Southern Volcanic Zone, Chile. J Petr, 43: 1571-1593.

Davidson J P, Ferguson K M, Colucci M T, Dungan M A, 1988. The origin and evolution of magmas from the San Pedro-Pellado volcanic complex, S. Chile: multicomponent sources and open system evolution. Contr Mineral Petr, 100: 429-445.

Drake R E, 1976b. The chronology of Cenozoic igneous and tectonic events in the central Chilean Andes. In: Gonzalez-Ferran O (ed) {Proc Symp Andean & Antarctic Volcanology Problems (Santiago, Chile, Sept 1974)}, Rome: IAVCEI, p 670-697.

Dungan M A, Wulff A, Thompson R, 2001. Eruptive stratigraphy of the Tatara-San Pedro complex, 36° S, Southern Volcanic Zone, Chilean Andes: reconstruction method and implications for magma evolution at long-lived arc volcanic centers. J Petr, 42: 555-626.

Feeley T C, Dungan M A, Frey F A, 1998. Geochemical constraints on the origin of mafic and silicic magmas at Cordon el Guadal, Tatara-San Pedro complex, central Chile. Contr Mineral Petr, 131: 393-411.

Ferguson K M, Dungan M A, Davidson J P, Colucci M T, 1992. The Tatara-San Pedro volcano, 36° S, Chile: a chemically variable, dominantly mafic magmatic system. J Petr, 33: 1-43.

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

Hildreth W, Moorbath S, 1988. Crustal contribution to arc magmatism in the Andes of central Chile. Contr Mineral Petr, 98: 455-489.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Moreno H, 1974. Airplane flight over active volcanoes of central-south Chile. Internatl Symp Volc Andean & Antarctic Volc Problems Guidebook, Excur D-3, 56 p.

Moreno H, Naranjo J A, 1991. The southern Andes volcanoes (33°-41° 30' S), Chile. 6th Geol Cong Chile, Excur PC-3, 26 p.

Singer B S, Thompson R A, Dungan M A, Feeley T C, Nelson S T, Pickens J C, Brown L L, Wulff A W, Davidson J P, Metzger J, 1997. Volcanism and erosion during the past 930 k.y. at the Tatara-San Pedro complex, Chilean Andes. Geol Soc Amer Bull, 109: 127-142.

The Global Volcanism Program is not aware of any Holocene eruptions from San Pedro-Pellado. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the San Pedro-Pellado 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.


San Pedro-Tatara | Tatara-San Pedro


Feature Name Feature Type Elevation Latitude Longitude
Gaudal, Volcán Stratovolcano
Pellado Stratovolcano 3120 m 35° 58' 26" S 70° 47' 35" W
San Pedro
    Yeguas, Las
Stratovolcano 3621 m 35° 59' 20" S 70° 50' 56" W
Tatara Shield volcano 3224 m 35° 59' 0" S 70° 52' 0" W


Feature Name Feature Type Elevation Latitude Longitude
Río Colorado Pleistocene caldera

Photo Gallery

A young scoria cone rises above the glacier-filled summit crater of 3621-m-high San Pedro stratovolcano, viewed here from the NW. The San Pedro-Pellado complex was constructed within the 6 x 12 km Río Colorado caldera, which formed during an eruption about 0.5 million years ago. San Pedro volcano itself is of Holocene age. No historical eruptions have been recorded from San Pedro-Pellado, but fumaroles are found SE of Pellado.

Photo by Oscar González-Ferrán (University of Chile).

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of San Pedro-Pellado 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.