Canada · Cono piroclastico
Hoodoo Mountain
- Tipo
- Cono piroclastico
- Altitudine
- 1850 m
- Ultima eruzione
- -7050
- Tipo
- Cono piroclastico
- Paese
- Canada
- Regione
- Nord America / Northern Cordilleran Volcanic Province
- Altitudine
- 1850 m
- Coordinate
- 56.780, -131.280
- Ultima eruzione
- -7050
- Contesto tettonico
- Intraplacca / Crosta continentale (> 25 km)
- Forma vulcanica
- Minore
- Roccia principale
- Fonolite
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 ingleseHoodoo 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
1 registrateGlossarioCronologia dettagliata
- 7050 a.C.VEI 0Stima geologica7050 a.C. – fine sconosciuta
Vulcani nelle vicinanze
Link esterni
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