Estados Unidos · Volcán en escudo
Newberry Volcano
Newberry
- Tipo
- Volcán en escudo
- Altitud
- 2434 m
- Última erupción
- 690
- Tipo
- Volcán en escudo
- País
- Estados Unidos
- Región
- América del Norte / High Cascades Volcanic Arc
- Altitud
- 2434 m
- Coordenadas
- 43.722, -121.229
- Última erupción
- 690
- Contexto tectónico
- Zona de subducción / Corteza continental (> 25 km)
- Forma volcánica
- Escudo
- Roca principal
- Andesita / Andesita basáltica
Resumen geológico
Newberry volcano, situated east of the Cascade Range, covers an area of about 1,600 km2. The low-angle basaltic to basaltic andesite shield volcano includes more than 400 cinder cones, but has also produced major silicic eruptions associated with formation of a 6 x 8 km summit caldera containing two lakes. The earliest eruptive products (less than 0.73 Ma) consist of a sequence of ash-flow and airfall tuffs. Caldera collapse is thought to be associated with major ash deposits from about 0.5 and 0.3-0.5 Ma. These eruptions were preceded by the emplacement of numerous mafic cones and vents, and silicic lava domes and flows, many of which are aligned NNW and NNE parallel to regional fault zones. Six major eruptions from the early Holocene to about 1,300 years ago have included both basaltic lava flows from flank vents, the explosive ejection of rhyolitic pumice and pyroclastic flows, and the extrusion of obsidian flows within the caldera.
Resumen de Wikipedia
Resumen en inglésNewberry Volcano is a large, active, shield-shaped stratovolcano located about 20 miles (32 km) south of Bend, Oregon, United States, 35 miles (56 km) east of the major crest of the Cascade Range, within the Newberry National Volcanic Monument. Its highest point is Paulina Peak. Newberry is the largest volcano in the Cascade Volcanic Arc, with an area of 1,200 square miles (3,100 km2) when its lava flows are taken into account. From north to south, the volcano has a length of 75 miles (121 km), with a width of 27 miles (43 km) and a total volume of approximately 120 cubic miles (500 km3). It was named for the geologist and surgeon John Strong Newberry, who explored central Oregon for the Pacific Railroad Surveys in 1855.
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Historial de erupciones
11 registradasGlosarioLínea de tiempo detallada
- 690 (±100 años)VEI 4Estimación geológica690 – fin desconocidoS caldera wall
- 490 (±100 años)VEI 4Estimación geológica490 – fin desconocidoSouth caldera wall
- 1450 a. C.VEI ?Estimación geológica1450 a. C. – fin desconocidoSouth of East Lake
- 4450 a. C.VEI ?Estimación geológica4450 a. C. – fin desconocidoCenter, N & S caldera, upper SE flank
- 4690 a. C. (±150 años)VEI 0Estimación geológica4690 a. C. – fin desconocidoNW rift zone
- 4770 a. C. (±75 años)VEI ?Estimación geológica4770 a. C. – fin desconocidoNW rift zone (Sugarpine Butte)
- 4860 a. C. (±150 años)VEI 0Estimación geológica4860 a. C. – fin desconocidoNW rift zone
- 4960 a. C. (±100 años)VEI ?Estimación geológica4960 a. C. – fin desconocidoEast Lake fissure, south flank
- 5070 a. C. (±150 años)VEI 3Estimación geológica5070 a. C. – fin desconocidoLower NW rift zone (Lava Butte)
- 5260 a. C. (±150 años)VEI 0Estimación geológica5260 a. C. – fin desconocidoNW rift zone (Lava Cast Forest)
- 9210 a. C. (±1200 años)VEI ?Estimación geológica9210 a. C. – fin desconocidoSouth and east caldera rim
Volcanes cercanos
Enlaces externos
⚠ Solo como referencia. No apto para respuesta ante emergencias.