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Belknap Crater

Belknap

순상화산 · United States · 2094m

The McKenzie Pass area in the central Oregon Cascades contains one of the largest concentrations of recent volcanism in the United States. Belknap shield volcano, seen here from Black Crater to the SE, is capped by a smaller snow-covered cone. Lava flows from Belknap and the smaller Little Belknap shield volcano in front of it cover nearly 100 km2. Most of the largely unvegetated flows were erupted between about 2,900 and 1,500 years ago.
The McKenzie Pass area in the central Oregon Cascades contains one of the largest concentrations of recent volcanism in the United States. Belknap shield volcano, seen here from Black Crater to the SE, is capped by a smaller snow-covered cone. Lava flows from Belknap and the smaller Little Belknap shield volcano in front of it cover nearly 100 km2. Most of the largely unvegetated flows were erupted between about 2,900 and 1,500 years ago. · 사진: Photo by Lee Siebert, 1995 (Smithsonian Institution). · Wikimedia Commons
화산 유형
순상화산
국가
United States
지역
North America Volcanic Regions / High Cascades Volcanic Arc
해발
2094m
좌표
44.285, -121.842
마지막 분화
475년
판구조 환경
Subduction zone / Continental crust (> 25 km)
화산 지형
Shield
주요 암석
Andesite / Basaltic Andesite
지질학적 요약

The Belknap Crater area near McKenzie Pass in Oregon, north of the Three Sisters volcanoes, was the source of one of the largest concentrations of youthful volcanism in the Cascade Range. The basaltic to basaltic andesite Belknap shield volcano, topped by the Belknap Crater pyroclastic cone and the Little Belknap shield volcano immediately to the east, have produced widespread late Holocene lava flows on all sides, much of which took place between about 3,000 and 1,500 years ago. Eruptions from the NE base of Belknap crater produced lava flows that traveled 15 km W into the McKenzie River valley.

Wikipedia 요약

영어 요약

Belknap Crater is a shield volcano in the Cascade Range in the U.S. state of Oregon. Located in Linn County, it is associated with lava fields and numerous subfeatures including the Little Belknap and South Belknap volcanic cones. It lies north of McKenzie Pass and forms part of the Mount Washington Wilderness. Belknap is not forested and most of its lava flows are not vegetated, though there is some wildlife in the area around the volcano, as well as a number of tree molds formed by its eruptive activity.

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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
5050 BCE~4853 BCE · 1건 · 최고 VEI ?1104 BCE~906 BCE · 1건 · 최고 VEI 0709 BCE~512 BCE · 1건 · 최고 VEI 2278~475 · 1건 · 최고 VEI 25050 BCE3669 BCE2287 BCE1104 BCE278

상세 타임라인

  1. 475년 (±215년)VEI 2지질학적 추정
    475 ~ 진행 중
    Belknap Crater
  2. 기원전 685년 (±50년)VEI 2지질학적 추정
    BCE 685 ~ 진행 중
    South Belknap and Twin Craters
  3. 기원전 1071년 (±241년)VEI 0지질학적 추정
    BCE 1071 ~ 진행 중
    Little Belknap
  4. 기원전 5050년VEI ?지질학적 추정
    BCE 5050 ~ 진행 중

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