Korosi

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 0.77°N
  • 36.12°E

  • 1446 m
    4743 ft

  • 222054
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Korosi.

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

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

The trachytic Korosi shield volcano lies at the north end of Lake Baringo. Unlike other rift valley volcanoes, it does not contain a summit caldera. Lava domes on the northern flanks have fed trachytic lava flows. The major stage of Korosi volcanism spanned a period between 0.4 and 0.1 million years ago and included the eruption of voluminous fluid basaltic lava flows and pyroclastic cone formation along a NNE-trending fissure cutting across the axis of the shield volcano. This was followed by the eruption of trachytic lava domes and pumice/scoria cones. The youngest activity, consisting of fissure-fed basaltic lava flows on the lower northern flanks between Korosi and Paka, was probably coeval with the latest eruptions on Ol Kokwe to the south, which are only a few hundred to a few thousand years old (Dunkley et al. 1993). Fumaroles and hot steaming ground occur around the summit cones and NW flanks over an area of 30 sq km.

The Global Volcanism Program is not aware of any Holocene eruptions from Korosi. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Korosi 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
Chesoro Vent
Kebongo Cone
Kolobochon Tuff ring
Komolion
    Gomulion
Vent
Kuraiswa
    Kechii
Vent

Craters

Feature Name Feature Type Elevation Latitude Longitude
Getang
    Kinyach
Crater
Getang crater, also known as Kinyach, is a pit crater on the northern side of the Korosi summit area. The walls of the 600-m-wide, 120-m-deep crater expose trachytic lava flows. Unlike other rift valley volcanoes, Korosi does not contain a summit caldera. The youngest activity at Korosi, consisting of fissure-fed basaltic lava flows on the lower northern flanks, may have occurred only a few hundred to a few thousand years ago.

Photo by Martin Smith, 1993 (copyright British Geological Survey, NERC).

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.

Dunkley P N, Smith M, Allen D A, Darling W G, 1993. The geothermal activity and geology of the northern sector of the Kenya Rift Valley. Brit Geol Surv Res Rpt, SC/93/1: 1-185.

Hackman B D, 1988. Geology of the Baringo-Laikipia area. Rpt Mines Geol Dept Kenya, 104: 1-79.

Smith M, 1991. . (pers. comm.).

Williams L A J, Macdonald R, Chapman G R, 1984. Late Quaternary caldera volcanoes of the Kenya Rift Valley. J Geophys Res, 89: 8553-8570.

Volcano Types

Shield
Tuff ring
Pyroclastic cone(s)
Lava dome(s)

Tectonic Setting

Rift zone
Continental crust (> 25 km)

Rock Types

Major
Trachyte / Trachyandesite
Basalt / Picro-Basalt
Trachyandesite / Basaltic trachy-andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
1,256
9,641
85,474
2,051,312

Affiliated Databases

Large Eruptions of Korosi 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.