미국 · 성층화산
Mount Bachelor
Bachelor
- 화산 유형
- 성층화산
- 해발
- 2763m
- 마지막 분화
- -5800년
- 화산 유형
- 성층화산
- 국가
- 미국
- 지역
- 북아메리카 / High Cascades Volcanic Arc
- 해발
- 2763m
- 좌표
- 43.979, -121.688
- 마지막 분화
- -5800년
- 판구조 환경
- 섭입대 / 대륙 지각 (> 25 km)
- 화산 지형
- 복성화산체
- 주요 암석
- 안산암 / 현무암질 안산암
지질학적 요약
This volcanic system extends from Mount Bachelor on the N to Lookout Mountain about 20 km S, with a chain of scoria cones and small shield volcanoes between and additional volcanic features to the E. The basaltic andesite and basaltic volcanoes formed during four eruptive periods dating back to about 18,000-15,000 years before present (BP). Construction of the main scoria cone chain was completed by about 12,000 years BP, and Bachelor (formerly known as Bachelor Butte) is one of its youngest features. The latest activity produced lava flows on the E side of Sparks Lake from scoria cones on the NNE flank of Bachelor, and lava flows from Egan scoria cone on the N flank that slightly preceded the eruption of the Mazama ash from Crater Lake about 7,000-8,500 years ago.
Wikipedia 요약
영어 요약Mount Bachelor, formerly named Bachelor Butte, is a dormant stratovolcano atop a shield volcano in the Cascade Volcanic Arc and the Cascade Range of central Oregon, United States. Named Mount Bachelor because it stands apart from the nearby Three Sisters, it lies in the eastern segment of the central portion of the High Cascades, the eastern segment of the Cascade Range. The volcano lies at the northern end of the 15-mile (24 km) long Mount Bachelor Volcanic Chain, which underwent four major eruptive episodes during the Pleistocene and the Holocene. The United States Geological Survey considers Mount Bachelor a moderate threat, but Bachelor poses little threat of becoming an active volcano in the near future. It remains unclear whether the volcano is extinct or just inactive.
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분화 이력
1건 기록용어집상세 타임라인
- 기원전 5800년 (±750년)VEI ?지질학적 추정기원전 5800 ~ 종료일 미상North flank (Egan cone)
주변 화산
외부 링크
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