Canada · Cono piroclastico
Cono Nazko
Nazko
- Tipo
- Cono piroclastico
- Altitudine
- 1238 m
- Ultima eruzione
- -5220
- Tipo
- Cono piroclastico
- Paese
- Canada
- Regione
- Nord America / Interior Western Canada Volcanic Province
- Altitudine
- 1238 m
- Coordinate
- 52.928, -123.732
- Ultima eruzione
- -5220
- Contesto tettonico
- Intraplacca / Crosta continentale (> 25 km)
- Forma vulcanica
- Minore (basaltico)
- Roccia principale
- Trachibasalto / Tefrite basanite
Sintesi geologica
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.
Sintesi da Wikipedia
Riassunto in ingleseNazko 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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Storia delle eruzioni
1 registrateGlossarioCronologia dettagliata
- 5220 a.C. (±100 anni)VEI ?Stima geologica5220 a.C. – fine sconosciuta
Vulcani nelle vicinanze
- caldera di SilverthroneCaldera · a 226 km
- Bridge River ConesCampo vulcanico · a 238 km
- Massiccio del monte MeagerVulcano complesso · a 256 km
- Wells Gray-Clearwater volcanic fieldCampo vulcanico · a 265 km
- Mount Cayley volcanic fieldCampo vulcanico · a 314 km
- Garibaldi Lake volcanic fieldCampo vulcanico · a 337 km
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.