Las Lajas

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 12.3°N
  • 85.73°W

  • 926 m
    3037 ft

  • 344133
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Las Lajas.

The Global Volcanism Program has no Weekly Reports available for Las Lajas.

The Global Volcanism Program has no Bulletin Reports available for Las Lajas.

Las Lajas is the largest volcano of possible Quaternary age east of the Nicaraguan graben. The broad, low, basaltic shield volcano is truncated by a 7-km-wide, steep-walled caldera. The 650-m-deep caldera is breached by a narrow canyon on the SE side that drains into Lake Nicaragua. Five coalescing andesitic-dacitic lava domes are located in the center of the caldera, and additional domes are present on the outer flanks. Las Lajas was considered to be of Holocene age on the basis of youthful morphology (McBirney and Williams, 1965), however Plank et al. (2002) obtained three radiometric dates of Miocene age, and the main edifice may be older than previously thought. Van Wyk de Vries (1999, pers. comm.) earlier noted that Las Lajas itself was of probable Pleistocene age, but that youthful cinder cones on the flanks are similar to those of the Nejapa alignment and may be of Holocene age.

The Global Volcanism Program is not aware of any Holocene eruptions from Las Lajas. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Las Lajas 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
Castillo, Cerro el Cone
Ochenta Pesos, Cerro Cone
San Ildefonso, Cerro Cone


Domes
Feature Name Feature Type Elevation Latitude Longitude
Flor, Cerro de la Dome
Monte, Cerro de Dome
Uva, Cerrito de la Dome
Las Lajas volcano rises on the horizon NE of the flat-lying floor of the Nicaraguan central depression. The massive basaltic shield volcano is the largest Quaternary volcano east of the depression and contains a 7-km-wide caldera.

Photo by Benjamin van Wyk de Vries (Open University).
The SE side of the caldera of Las Lajas volcano is breached by a narrow canyon through which the Quebrada Las Lajas drains into Lake Nicaragua. The caldera walls of Las Lajas are up to 650 m high.

Photo by Benjamin van Wyk de Vries (Open University).
Las Lajas is the largest Quaternary volcano east of the Nicaraguan graben. The broad, low, basaltic shield volcano is truncated by a 7-km-wide, 650-m-deep caldera, whose SSW rim forms the horizon. In the foreground are part of a group of five coalescing andesitic-dacitic lava domes that are located in the center of the caldera. Additional domes are present on the outer flanks. Las Lajas itself is of probable Pleistocene age, but youthful cinder cones on the flanks are similar to those of the Nejapa alignment and may be of Holocene age.

Photo by Benjamin van Wyk de Vries (Open University).
The rounded lava dome in the center of the photo is a dacitic post-caldera dome that was constructed on the southern flank of the basaltic Las Lajas shield volcano. In addition to flank domes, five coalescing domes were constructed within the caldera.

Photo by Benjamin van Wyk de Vries (Open University).

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.

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

McBirney A R, Williams H, 1965. Volcanic history of Nicaragua. Univ Calif Pub Geol Sci, 55: 1-65.

Parsons Corporation, 1972. The Geology of Western Nicaragua. Nicaragua Tax Improvement and Natural Resources Inventory Project, Final Technical Rpt, v. IV.

Plank T, Balzer V, Carr M, 2002. Nicaraguan volcanoes record paleoceanographic changes accompanying closure of the Panama gateway. Geology, 30: 1087-1090.

van Wyk de Vries B, 1999. . (pers. comm.).

Volcano Types

Shield
Caldera
Lava dome(s)
Pyroclastic cone(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Basalt / Picro-Basalt
Andesite / Basaltic Andesite
Dacite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
1,901
11,384
130,109
3,304,910

Affiliated Databases

Large Eruptions of Las Lajas 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.