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Alutu

Aluto

성층화산 · Ethiopia · 2335m

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. · 사진: NASA International Space Station image ISS001-363-7, 2001 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
화산 유형
성층화산
국가
Ethiopia
지역
Eastern Africa Volcanic Regions / Main Ethiopian Rift Volcanic Province
해발
2335m
좌표
7.770, 38.780
마지막 분화
1550년
판구조 환경
Rift zone / Continental crust (> 25 km)
화산 지형
Composite
주요 암석
Rhyolite
지질학적 요약

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.

분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
10900 BCE~10485 BCE · 1건 · 최고 VEI ?7580 BCE~7165 BCE · 1건 · 최고 VEI ?6335 BCE~5920 BCE · 1건 · 최고 VEI ?110 BCE~305 · 1건 · 최고 VEI ?1135~1550 · 1건 · 최고 VEI ?10900 BCE7995 BCE4675 BCE1770 BCE1135

상세 타임라인

  1. 1550년 (±50년)VEI ?지질학적 추정
    1550 ~ 진행 중
    Tephra sample from E flank of edifice
  2. 기원전 50년VEI ?지질학적 추정
    BCE 50 ~ 진행 중
  3. 기원전 6200년 (±1680년)VEI ?지질학적 추정
    BCE 6200 ~ 진행 중
    Tephra sample from Deka Wede (W of caldera)
  4. 기원전 7280년 (±2000년)VEI ?지질학적 추정
    BCE 7280 ~ 진행 중
    Tephra sample from Haroresa (S of caldera)
  5. 기원전 10900년 (±1630년)VEI ?지질학적 추정
    BCE 10900 ~ 진행 중
    Tephra sample from Deka Wede (W of caldera)

외부 링크

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