Mojanda

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  • Ecuador
  • South America
  • Stratovolcano(es)
  • Unknown - Uncertain Evidence
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 0.13°N
  • 78.27°W

  • 4263 m
    13983 ft

  • 352005
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Mojanda.

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

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

Mojanda, one of the largest volcanoes of Ecuador's northern Interandean Depression, rises SW of the historic town of Otavalo. Volcán Mojanda has a complex geologic history involving two adjacent simultaneously active volcanoes. An earlier edifice contains remnants of a larger earlier caldera and a smaller summit caldera occupied by two lakes. The andesitic-to-rhyolitic Fuya Fuya volcano was constructed contemporaneously immediately to the west of Mojanda and produced two major rhyolitic plinian explosive eruptions, possibly associated with caldera formation. Fuya Fuya underwent edifice collapse less than 165,000 years ago, leaving a large horseshoe-shaped caldera open to the west. Subsequently, a new composite cone and dacitic lava domes were extruded inside the caldera. The youngest domes are unglaciated and of possible Holocene age.

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



Cones
Feature Name Feature Type Elevation Latitude Longitude
Cushnirumi Stratovolcano
Fuya Fuya Stratovolcano
San Bartolo Stratovolcano


Domes
Feature Name Feature Type Elevation Latitude Longitude
Colangal, Cerro Dome 0° 7' 34" N 78° 16' 23" W
Panecillo, Cerro el Dome 0° 9' 0" N 78° 17' 2" W
Puellaro Dome
San Jorge Dome
Laguna Grande de Mojanda is the lake to the left of the center of this NASA Space Shuttle image with north to the upper left. The lake lies within the Mojanda volcanic complex, one of the largest volcanoes of Ecuador's northern Interandean Depression. The andesitic-to-rhyolitic Fuya Fuya volcano lies west of the lake and produced two major rhyolitic plinian explosive eruptions, possibly associated with caldera formation. The Pisque or Granobles River at the lower right is near the town of Cayambe.

NASA Space Shuttle image ISS008-E14887, 2004 (http://eol.jsc.nasa.gov/).
Laguna Grande de Mojanda occupies the caldera of Mojanda volcano, one of the largest volcanoes of Ecuador's northern Interandean Depression. This view looks toward the rugged eastern rim of the caldera from the slopes of the post-caldera stratovolcano Fuya Fuya with Cerro Negro at the upper right. Laguna Grande de Mojanda is one of two lakes occupying a summit caldera cutting an older Mojanda edifice. Fuya Fuya volcano was constructed immediately to the west of Mojanda and produced two major rhyolitic plinian explosive eruptions.

Photo by Lee Siebert, 2006 (Smithsonian Institution).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Hall M L, 1977. El Volcanismo en El Ecuador. Quito: Biblioteca Ecuador, 120 p.

Hall M L, 1992. . (pers. comm.).

Hall M L, 1998. . (pers. comm.).

Robin C, Eissen J-P, Samaniego P, Martin H, Hall M, Cotten J, 2009. Evolution of the late Pleistocene Mojanda-Fuya Fuya volcanic complex (Ecuador), by progressive adakitic involvement in mantle magma sources. Bull Volc, 71: 233-258.

Robin C, Hall M, Jiminez M, Monzier M, Escobar P, 1997. Mojanda volcanic complex (Ecuador): development of two adjacent contemporaneous volcanoes with contrasting eruptive styles and magmatic suites. J South Amer Earth Sci, 10: 345-359.

Volcano Types

Stratovolcano(es)
Caldera(s)
Lava dome(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Andesite / Basaltic Andesite
Dacite
Rhyolite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
173
15,510
480,382
3,071,030

Affiliated Databases

Large Eruptions of Mojanda 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).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.