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Alutu

Aluto

Stratovolkan · Ethiopia · 2335 m

Alutu volcano lies between the light-brown Lake Mirrga (Lake Langano) to the S and green-blue Lake Zway to the N. Several craters are aligned along NNE-SSW and E-W fissures. Dark-colored obsidian lava flows erupted from craters along the fissures and descended the flanks in all directions. Although the age of the most recent eruption is not known, its eruptive products overlie recent basaltic lava flows to the W and strong fumarolic activity continues.
Alutu volcano lies between the light-brown Lake Mirrga (Lake Langano) to the S and green-blue Lake Zway to the N. Several craters are aligned along NNE-SSW and E-W fissures. Dark-colored obsidian lava flows erupted from craters along the fissures and descended the flanks in all directions. Although the age of the most recent eruption is not known, its eruptive products overlie recent basaltic lava flows to the W and strong fumarolic activity continues. · Foto: NASA International Space Station image ISS001-363-7, 2001 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
Tipe
Stratovolkan
Negara
Ethiopia
Wilayah
Eastern Africa Volcanic Regions / Main Ethiopian Rift Volcanic Province
Ketinggian
2335 m
Koordinat
7.770, 38.780
Letusan terakhir
1550
Kondisi tektonik
Rift zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Rhyolite
Ringkasan geologi

Aluto, between lakes Zway and Langano (Mirrga), is a stratovolcano with multiple vents aligned along NNE-SSW and E-W fissures along a narrow graben between the two lakes. This silicic volcanic center lies along the regional Wonji Fault Belt and has produced abundant pumice-flow and pumice-fall deposits, along with lesser rhyolitic lava flows. Obsidian lava flows erupted from craters along the fissures have descended the flanks in all directions. Cinder cones, lava domes, phreatic explosion craters, and thermal springs are structurally controlled. The oldest known eruptions produced the Hulo-Seyno Ignimbrite about 155,000 years ago. The latest eruptions produced obsidian flows and pumice breccias about 2,000 years ago. Eruptive products overlie recent basaltic lava flows to the west. Strong fumarolic activity continues.

Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
10900 BCE~10485 BCE · 1 letusan · VEI maks. ?7580 BCE~7165 BCE · 1 letusan · VEI maks. ?6335 BCE~5920 BCE · 1 letusan · VEI maks. ?110 BCE~305 · 1 letusan · VEI maks. ?1135~1550 · 1 letusan · VEI maks. ?10900 BCE7995 BCE4675 BCE1770 BCE1135

Garis waktu rinci

  1. 1550 (±50 tahun)VEI ?Perkiraan geologi
    1550 – Berlangsung
    Tephra sample from E flank of edifice
  2. 50 SMVEI ?Perkiraan geologi
    BCE 50 – Berlangsung
  3. 6200 SM (±1680 tahun)VEI ?Perkiraan geologi
    BCE 6200 – Berlangsung
    Tephra sample from Deka Wede (W of caldera)
  4. 7280 SM (±2000 tahun)VEI ?Perkiraan geologi
    BCE 7280 – Berlangsung
    Tephra sample from Haroresa (S of caldera)
  5. 10900 SM (±1630 tahun)VEI ?Perkiraan geologi
    BCE 10900 – Berlangsung
    Tephra sample from Deka Wede (W of caldera)

Tautan eksternal

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