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Barrier

Barrier, The

Vulcano a scudo · Kenya · 1032 m

A northward-looking aerial view shows the summit caldera of Kakorinya volcano of The Barrier volcanic complex with Lake Turkana in the distance. The 3.8-km-wide summit caldera was formed about 92,000 years ago, and post-caldera lava domes and flows fill much of the caldera floor. Fresh-looking lava flows and tuff cones occur along the shores of Lake Turkana. Teleki's Cone on the northern flank and Andrew's Cone (lower left foreground) on the southern flank have been the source of historical lava flows.
A northward-looking aerial view shows the summit caldera of Kakorinya volcano of The Barrier volcanic complex with Lake Turkana in the distance. The 3.8-km-wide summit caldera was formed about 92,000 years ago, and post-caldera lava domes and flows fill much of the caldera floor. Fresh-looking lava flows and tuff cones occur along the shores of Lake Turkana. Teleki's Cone on the northern flank and Andrew's Cone (lower left foreground) on the southern flank have been the source of historical lava flows. · Foto: Photo by Martin Smith, 1993 (copyright British Geological Survey, NERC).
Tipo
Vulcano a scudo
Paese
Kenya
Regione
Eastern Africa Volcanic Regions / Kenyan Rift Volcanic Province
Altitudine
1032 m
Coordinate
2.320, 36.570
Ultima eruzione
1921
Contesto tettonico
Rift zone / Continental crust (> 25 km)
Forma vulcanica
Shield
Roccia principale
Trachyte / Trachydacite
Sintesi geologica

The Barrier volcanic complex separates Lake Turkana from the broad Suguta Trough to the S, the site of a former lake. The volcano is comprised of four overlapping shield volcanoes, with the youngest, Kakorinya, located over the axis of the East African Rift. Kalolenyang volcano lies W of Kakorinya, and Likaiu West and Likaiu East are located to the ENE. A 3.8-km-wide summit caldera was formed at Kakorinya about 92,000 years ago. Youthful-looking trachytic and phonolitic lava domes and flows erupted within the caldera and along its ring fracture fill much of the caldera floor. Early Holocene fissure-related scoria cones and lava flows dot the S and N flanks. Solfataric fields are located within the caldera and on the W and S flanks. Historical eruptions from Teleki's and Andrew's cones on the N and S flanks, respectively, have produced basaltic explosive activity and lava flows during the 19th and 20th centuries.

Sintesi da Wikipedia

Riassunto in inglese

The Barrier is an active shield volcano located in the north of Kenya. It is last known to have erupted in 1921.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
7710 BCE~7389 BCE · 1 eruzioni · VEI max. ?958~1279 · 3 eruzioni · VEI max. 01600~1921 · 8 eruzioni · VEI max. 27710 BCE5463 BCE2894 BCE647 BCE1600

Cronologia dettagliata

  1. 1921VEI 2Osservata
    1921-12-31 – In corso
    North flank (Teleki)
  2. 1920 (±3 anni)VEI ?Stima geologica
    1920 – In corso
    South flank (Andrew's Volcano)
  3. 1917VEI 2Osservata
    1917 – In corso
    Andrew's or Teleki's Volcanoes
  4. 1906VEI ?Stima geologica
    1906 – In corso
    Andrew's or Teleki's Cones
  5. 1897VEI 2Osservata
    1897-05 – In corso
    North flank (Teleki) and Likaiu
  6. 1895VEI 2Osservata
    1895 – In corso
    North flank (Teleki's Cone)
  7. 1888VEI 0Osservata
    1888 – In corso
    North flank (Teleki's Cone)
  8. 1871 (±3 anni)VEI 2Osservata
    1871 – In corso
    North flank (Teleki's Cone)
  9. 1090 (±50 anni)VEI 0Stima geologica
    1090 – In corso
    North flank
  10. 1050 (±150 anni)VEI 0Stima geologica
    1050 – In corso
    North flank
  11. 1030 (±150 anni)VEI 0Stima geologica
    1030 – In corso
    North flank
  12. 7710 a.C. (±200 anni)VEI ?Stima geologica
    BCE 7710 – In corso
    North (Abili Agituk) and south flanks

Link esterni

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