San Borja Volcanic Field

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 28.5°N
  • 113.75°W

  • 1360 m
    4461 ft

  • 341007
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for San Borja Volcanic Field.

The Global Volcanism Program has no Weekly Reports available for San Borja Volcanic Field.

The Global Volcanism Program has no Bulletin Reports available for San Borja Volcanic Field.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

1360 m / 4461 ft


Volcano Types

Pyroclastic cone(s)

Rock Types

Andesite / Basaltic Andesite
Trachyandesite / Basaltic trachy-andesite
Basalt / Picro-Basalt

Tectonic Setting

Rift zone
Continental crust (> 25 km)


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

Geological Summary

The San Borja volcanic field, also known as the El Rosarito volcanic field, is located in central Baja California NE of the Vizcaino Peninsula. Holocene lava flows occur at Rosarito and Morro San Domingo at the western end of the San Borja volcanic field along the coast north of the Vizcaino Peninsula. Some lava flows of the San Borja volcanic field are less vegetated than flows of the San Quintín volcanic field to the north that overlie 5000-6000 year-old midden deposits (Rogers et al., 1985). The Holocene lava flows in the western part of this alkalic volcanic field are of basaltic-andesite and andesitic composition.


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

Calmus T, Aguillon-Robles A, Maury R C, Bellon H, Benoit M, Cotten J, Bourgois J, Michaud F, 2003. Spatial and temporal evolution of basalts and magnesian andesites ("bajaites") from Baja California, Mexico: the role of slab melts. Lithos, 66: 77-105.

Gastil R G, Phillips R P, Allison E C, 1975. Reconnaissance geology of the State of Baja California. Geol Soc Amer Mem, 140: 1-170.

Luhr J F, Kimberly P G, Siebert L, Aranda-Gomez J J, Housh T B, Kysar Mattietti G, 2006. Quaternary volcanic rocks: insights from the MEXPET petrological and geochemical database. In: Siebe S, Macias J-L, Aguirre-Diaz G J (eds) Neogone-Quaternary continental margin volcanism: a perspective from Mexico, {Geol Soc Amer Spec Pap}, 402: 1-44.

Negrete-Aranda R, Canon-Tapia E, Brandle J M, Ortega-Rivera M A, Lee J K W, Spelz R M, Hinojosa-Corona A, 2010. Regional orientation of tectonic stress and the stress expressed by post-subduction high-magnesium volcanism in northern Baja California, Mexico: tectonics and volcanism of San Borja volcanic field. J Volc Geotherm Res, 192: 97-115.

Rogers G, Saunders A D, Terrell D J, Verma S P, Marriner G F, 1985. Geochemistry of Holocene volcanic rocks associated with ridge subduction in Baja California, Mexico. Nature, 315: 389-392.

Saunders A D, Rogers G, Marriner G F, Terrell D J, Verma S P, 1987. Geochemistry of Cenozoic volcanic rocks, Baja California, Mexico: implications for the petrogenesis of post-subduction magmas. J Volc Geotherm Res, 32: 223-245.

Sawlan M G, 1991. Magmatic evolution of the Gulf of California rift. In: Dauphin J P and Simoneit B A (eds) {The Gulf and Peninsular Province of the Californias}, Amer Assoc Petrol Geol Mem, 47: 301-369.

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


Rosarito Volcanic Field, El


Feature Name Feature Type Elevation Latitude Longitude
Malinche, Cerro de la Cone

Photo Gallery

The orange-brown ridge in the background is a thick, blocky basaltic-andesite lava flow of probable Holocene age that is part of the San Borja volcanic field. The flow is seen here from state highway 1 in central Baja California. The sparsely vegetated flow is one of many youthful lava flows of the San Borja volcanic field. Holocene lava flows of the San Borja field occur near Rosarito and Morrow San Domingo, at the western end of the San Borja region north of the Vizcaino peninsula.

Photo by Andy Saunders, 1984 (University of Leichester).
The steep-sided margin of a thick, blocky basaltic-andesite lava flow is seen from near state highway 1 in central Baja California with a pickup camper for scale. The sparsely vegetated flow is of probable Holocene age and is one of many youthful lava flows of the San Borja volcanic field.

Photo by Andy Saunders, 1984 (University of Leichester).

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of San Borja Volcanic Field 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.