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St. Andrew Strait

복합화산 · Papua New Guinea · 270m

The St. Andrew Strait volcano is located in the Admiralty Islands north of Papua New Guinea. The volcanic complex consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic deposits on Lou and Tuluman Islands. Volcanism is aligned along a curved arc, extending through the 12-km-long Lou Island. Tuluman Island, seen here from the SW with Lou Island 1.5 km away at the upper left, was formed during a 1953-57 eruption.
The St. Andrew Strait volcano is located in the Admiralty Islands north of Papua New Guinea. The volcanic complex consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic deposits on Lou and Tuluman Islands. Volcanism is aligned along a curved arc, extending through the 12-km-long Lou Island. Tuluman Island, seen here from the SW with Lou Island 1.5 km away at the upper left, was formed during a 1953-57 eruption. · 사진: Photo by Wally Johnson, 1964 (Australia Bureau of Mineral Resources).
화산 유형
복합화산
국가
Papua New Guinea
지역
남서태평양 / Bismarck Sea Volcanic Province
해발
270m
좌표
-2.380, 147.350
마지막 분화
1957년
판구조 환경
Subduction zone / Oceanic crust (< 15 km)
화산 지형
Composite
주요 암석
Rhyolite
지질학적 요약

The St. Andrew Strait volcano, located in the Admiralty Islands north of Papua New Guinea, consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic materials on Lou and Tuluman Islands. Volcanism is aligned on a curved arc extending through the 12-km-long Lou Island. The Tuluman Islands, 1.5 km S of Lou Island, were formed during a 1953-1957 eruption. Pam Lin and Pam Mandian Islands farther to the SE along the same arc contain fresh rhyolitic obsidian similar to that found on Tuluman.

분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
240 BCE~41 BCE · 1건 · 최고 VEI ?159~358 · 1건 · 최고 VEI ?1754~1953 · 3건 · 최고 VEI 2240 BCE35875713551754

상세 타임라인

  1. 1953년VEI 2관측 기록
    1953-06-27 ~ 1957-01-28
    Tuluman
  2. 1931년VEI 0지질학적 추정
    1931-07-02 ~ 진행 중
    Tuluman (?)
  3. 1883년VEI 2관측 기록
    1883-03-28 ~ 진행 중
    Tuluman
  4. 350년VEI ?지질학적 추정
    350 ~ 진행 중
    Lou Island (Bedal volcano)
  5. 기원전 240년 (±100년)VEI ?지질학적 추정
    BCE 240 ~ 진행 중
    Lou Island (Bedal volcano)

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