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Hoodoo Mountain

Cono piroclastico · Canada · 1850 m

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. · Foto: Photo by Ben Edwards, 1994 (Dickinson College, Pennsylvania). · Wikimedia Commons
Tipo
Cono piroclastico
Paese
Canada
Regione
North America Volcanic Regions / Northern Cordilleran Volcanic Province
Altitudine
1850 m
Coordinate
56.780, -131.280
Ultima eruzione
-7050
Contesto tettonico
Intraplate / Continental crust (> 25 km)
Forma vulcanica
Minor
Roccia principale
Phonolite
Sintesi geologica

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.

Sintesi da Wikipedia

Riassunto in inglese

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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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
7050 BCE~7050 BCE · 1 eruzioni · VEI max. 07050 BCE7050 BCE7049 BCE7049 BCE7049 BCE

Cronologia dettagliata

  1. 7050 a.C.VEI 0Stima geologica
    BCE 7050 – In corso

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