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가리발디산

Garibaldi

성층화산 · Canada · 2678m

Mount Garibaldi, rising above Garibaldi Lake to the north, is a largely Pleistocene stratovolcano with a summit lava dome complex. The volcano was partially constructed over the Cordilleran ice sheet and contains many ice-contact features. Its final eruptions during the early Holocene included lava flows that mantled the western landside scarp and a massive lava flow from Opal Cone, a SE flank vent, that traveled 20 km to the south and west.
Mount Garibaldi, rising above Garibaldi Lake to the north, is a largely Pleistocene stratovolcano with a summit lava dome complex. The volcano was partially constructed over the Cordilleran ice sheet and contains many ice-contact features. Its final eruptions during the early Holocene included lava flows that mantled the western landside scarp and a massive lava flow from Opal Cone, a SE flank vent, that traveled 20 km to the south and west. · 사진: Photo by Lee Siebert, 1983 (Smithsonian Institution). · Wikimedia Commons
화산 유형
성층화산
국가
Canada
지역
북아메리카 / Garibaldi Volcanic Arc
해발
2678m
좌표
49.850, -123.000
마지막 분화
-8060년
판구조 환경
Subduction zone / Continental crust (> 25 km)
화산 지형
Composite
주요 암석
Dacite
지질학적 요약

Mount Garibaldi at the head of Howe Sound north of Vancouver is a Pleistocene dacitic stratovolcano capped by a lava dome complex. An initial period of volcanism 0.51-0.22 million years ago was followed after a period of quiescence by construction of a conical plug dome and breccia pile at the south summit, Atwell Peak. Retreat of the ice cap left the W flank unsupported, and it collapsed in a series of landslides, exposing the core of the volcano. Lava flows from Dalton Dome north of Atwell Peak subsequently flowed down the scarp. Subglacial flank centers such as Eanastick (Enostuck) Meadow, Glacier Pike, and Paul Ridge were also formed during the late Pleistocene. The final activity formed the Opal Cone on the SE flank and the lengthy Ring Creek lava flow, which filled a glaciated valley on the S flank during the early Holocene (Mathews, 1958; Brooks and Friele, 1992).

Wikipedia 요약

영어 요약

Mount Garibaldi is a dormant stratovolcano in the Garibaldi Ranges of the Pacific Ranges in southwestern British Columbia, Canada. It has a maximum elevation of 2,678 metres and rises above the surrounding landscape on the east side of the Cheakamus River in New Westminster Land District. In addition to the main peak, Mount Garibaldi has two named sub-peaks. Atwell Peak is a sharp, conical peak slightly higher than the more rounded peak of Dalton Dome. Both were volcanically active at different times throughout Mount Garibaldi's eruptive history. The northern and eastern flanks of Mount Garibaldi are obscured by the Garibaldi Névé, a large snowfield containing several radiating glaciers. Flowing from the steep western face of Mount Garibaldi is the Cheekye River, a tributary of the Cheakamus River. Opal Cone on the southeastern flank is a small volcanic cone from which a lengthy lava flow descends. The western face is a landslide feature that formed in a series of collapses between 12,800 and 11,500 years ago. These collapses resulted in the formation of a large debris flow deposit that fans out into the Squamish Valley.

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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
8060 BCE~8060 BCE · 1건 · 최고 VEI 38060 BCE8060 BCE8059 BCE8059 BCE8059 BCE

상세 타임라인

  1. 기원전 8060년 (±500년)VEI 3지질학적 추정
    BCE 8060 ~ 진행 중
    SE flank (Opal Cone)

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