Kanada · Kerucut piroklastik
Nazko Cone
Nazko
- Tipe
- Kerucut piroklastik
- Ketinggian
- 1238 m
- Letusan terakhir
- -5220
- Tipe
- Kerucut piroklastik
- Negara
- Kanada
- Wilayah
- Amerika Utara / Interior Western Canada Volcanic Province
- Ketinggian
- 1238 m
- Koordinat
- 52.928, -123.732
- Letusan terakhir
- -5220
- Kondisi tektonik
- Intralempeng / Kerak benua (> 25 km)
- Bentuk lahan
- Kecil (basaltik)
- Batuan utama
- Trakibasal / Tefrit basanit
Ringkasan geologi
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.
Ringkasan Wikipedia
Ringkasan InggrisNazko 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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Riwayat letusan
1 tercatatGlosariumGaris waktu rinci
- 5220 SM (±100 tahun)VEI ?Perkiraan geologi5220 SM – akhir tidak diketahui
Gunung api terdekat
- Silverthrone CalderaKaldera · sejauh 226 km
- Bridge River ConesMedan gunung api · sejauh 238 km
- Mount MeagerGunung api kompleks · sejauh 256 km
- Wells Gray-Clearwater volcanic fieldMedan gunung api · sejauh 265 km
- Mount Cayley volcanic fieldMedan gunung api · sejauh 314 km
- Garibaldi Lake volcanic fieldMedan gunung api · sejauh 337 km
Tautan eksternal
⚠ Untuk referensi saja. Bukan untuk tanggap darurat.