미국 · 성층화산
Mount Roundtop
Roundtop
- 화산 유형
- 성층화산
- 해발
- 1871m
- 마지막 분화
- -7600년
- 화산 유형
- 성층화산
- 국가
- 미국
- 지역
- 북아메리카 / Aleutian Ridge Volcanic Arc
- 해발
- 1871m
- 좌표
- 54.800, -163.589
- 마지막 분화
- -7600년
- 판구조 환경
- 섭입대 / 대륙 지각 (> 25 km)
- 화산 지형
- 복성화산체
- 주요 암석
- 유문암
지질학적 요약
The flat-topped, glacier-covered Roundtop is the easternmost and lowest of an E-W-trending line of volcanoes on eastern Unimak Island, 13 km SW of the village of False Pass. The snow and ice-covered edifice fills much of a 3-km-wide caldera that formed during the early Holocene. The caldera-forming eruption produced pyroclastic flows and a rhyolitic tephra layer that is widespread throughout the southwestern end of the Alaska Peninsula. A group of lava domes was constructed south of the volcano. No historical eruptions are known, but in the 1930's warm springs were found on its slopes.
Wikipedia 요약
영어 요약Roundtop Mountain is a stratovolcano located on the Aleutian island of Unimak in the U.S. state of Alaska. Its last eruption was sometime between 9,100 and 10,000 years ago. This geographic feature was first called "Dome" in 1897 by Lieutenant Commander J. F. Moser, of the U.S. Navy. Its name was reported as "Round Top" by the United States Coast and Geodetic Survey in 1902. Isanotski Peaks, the nearest higher neighbor, is positioned 5.9 mi (9 km) to the west-southwest.
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분화 이력
1건 기록용어집상세 타임라인
- 기원전 7600년 (±500년)VEI 5지질학적 추정기원전 7600 ~ 종료일 미상
주변 화산
외부 링크
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