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フードゥー山

Hoodoo Mountain

火砕丘 · Canada · 1850m

Hoodoo Mountain, as seen from the SE across the Iskut River in northwestern British Columbia, is a flat-topped stratovolcano. It has an ice cap 3 km in diameter and has had several episodes of subglacial eruptions. Most of the deposits are lava flows. The oldest eruptions of the volcano occurred about 100,000 years ago and the most recent eruptions about 9,000 years ago. This is one of the largest peralkaline volcanoes in the northern Cordilleran volcanic province.
Hoodoo Mountain, as seen from the SE across the Iskut River in northwestern British Columbia, is a flat-topped stratovolcano. It has an ice cap 3 km in diameter and has had several episodes of subglacial eruptions. Most of the deposits are lava flows. The oldest eruptions of the volcano occurred about 100,000 years ago and the most recent eruptions about 9,000 years ago. This is one of the largest peralkaline volcanoes in the northern Cordilleran volcanic province. · 写真: Photo by Ben Edwards, 1994 (Dickinson College, Pennsylvania). · Wikimedia Commons
タイプ
火砕丘
国
Canada
地域
North America Volcanic Regions / Northern Cordilleran Volcanic Province
標高
1850m
座標
56.780, -131.280
最終噴火
-7050年
テクトニクス環境
Intraplate / Continental crust (> 25 km)
火山地形
Minor
主要岩石
Phonolite
地質学的概要

Hoodoo Mountain is a flat-topped Pleistocene-to-Holocene volcano in the Boundary Ranges of NW British Columbia near the Alaska border that is composed of both subglacial and subaerial volcanic products. Valley glaciers surround the volcano on all except the south side. The Pleistocene Little Bear Mountain basaltic tuya adjoins Hoodoo Mountain on the immediate north. Most of the volcano formed beneath glacial ice; all flank flows appear to have originated from beneath the current 4-km-wide summit icecap. More than 90% of the volcano, which dates back to at least 100,000 years, consists of interlayered peralkaline phonolitic and trachytic lava flows and hyaloclastites. At least one subaerial explosive eruption produced a welded and unwelded ignimbrite sequence on the north side. The most recent stage of volcanic activity produced subaerial unglaciated lava flows with well-preserved lava channels that originated from summit and flank vents about 9,000 years ago.

Wikipedia の要約

英語版の要約

Hoodoo Mountain, sometimes referred to as Hoodoo Volcano, is a potentially active stratovolcano in the Northern Interior of British Columbia, Canada. It is located 25 kilometres northeast of the Alaska–British Columbia border on the north side of the Iskut River opposite of the mouth of the Craig River. With a summit elevation of 1,850 metres and a topographic prominence of 900 m (3,000 ft), Hoodoo Mountain is one of many prominent peaks within the Boundary Ranges of the Coast Mountains. Its flat-topped summit is covered by an ice cap more than 100 m (330 ft) thick and at least 3 km (1.9 mi) in diameter. Two valley glaciers surrounding the northwestern and northeastern sides of the mountain have retreated significantly over the last hundred years. They both originate from a large icefield to the north and are the sources of two meltwater streams. These streams flow along the western and eastern sides of the volcano before draining into the Iskut River.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
7050 BCE~7050 BCE · 1件 · 最大 VEI 07050 BCE7050 BCE7049 BCE7049 BCE7049 BCE

詳細タイムライン

  1. 紀元前 7050年VEI 0地質学的推定
    BCE 7050 ~ 進行中

外部リンク

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