캐나다 · 화쇄구
Nazko Cone
Nazko
- 화산 유형
- 화쇄구
- 해발
- 1238m
- 마지막 분화
- -5220년
- 화산 유형
- 화쇄구
- 국가
- 캐나다
- 지역
- 북아메리카 / Interior Western Canada Volcanic Province
- 해발
- 1238m
- 좌표
- 52.928, -123.732
- 마지막 분화
- -5220년
- 판구조 환경
- 판 내부 / 대륙 지각 (> 25 km)
- 화산 지형
- 소규모 (현무암질)
- 주요 암석
- 조면현무암 / 테프라이트 바사나이트
지질학적 요약
Nazko Cone, the easternmost and youngest volcano of the Anahim Volcanic Belt in the Chilcotin-Nechako Plateau, central British Columbia, rests on glacial till. It was formed in three episodes of activity, the first of which took place during a Pleistocene interglacial stage about 340,000 years ago (Souther et al., 1987). The second stage produced a large hyaloclastite scoria mound erupted beneath the Cordilleran ice sheet during the late Pleistocene. The final activity occurred about 7,200 years ago, forming a compound subaerial basanitic cinder cone that overtopped the hyaloclastite mound and produced two small lava flows that traveled about 1 km W. An airfall tephra deposit extends several kilometers to the N and E. Mining of the red cinder and scoria deposits began in the early 1990s.
Wikipedia 요약
영어 요약Nazko Cone is a small potentially active basaltic cinder cone in central British Columbia, Canada, located 75 km west of Quesnel and 150 kilometers southwest of Prince George. It is considered the easternmost volcano in the Anahim Volcanic Belt. The small tree-covered cone rises 120 m above the Chilcotin-Nechako Plateau and rests on glacial till. It was formed in three episodes of activity, the first of which took place during the Pleistocene interglacial stage about 340,000 years ago. The second stage produced a large hyaloclastite scoria mound erupted beneath the Cordilleran Ice Sheet during the Pleistocene. Its last eruption produced two small lava flows that traveled 1 km to the west, along with a blanket of volcanic ash that extends several km to the north and east of the cone.
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분화 이력
1건 기록용어집상세 타임라인
- 기원전 5220년 (±100년)VEI ?지질학적 추정기원전 5220 ~ 종료일 미상
주변 화산
외부 링크
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