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Newberry Volcano

Newberry

Volcán en escudo · United States · 2434 m

Newberry volcano, one of the largest Quaternary volcanoes in the conterminous United States, lies 60 km E of the crest of the Cascade Range in central Oregon. The shield volcano contains a 5 x 7 km caldera with two lakes, Paulina Lake (left) and East Lake (right). Newberry has been active during the Holocene at vents within the caldera that have produced pumice cones and obsidian lava flows (like Obsidian flow to the lower right), and outside the caldera forming scoria cones on its broad flanks.
Newberry volcano, one of the largest Quaternary volcanoes in the conterminous United States, lies 60 km E of the crest of the Cascade Range in central Oregon. The shield volcano contains a 5 x 7 km caldera with two lakes, Paulina Lake (left) and East Lake (right). Newberry has been active during the Holocene at vents within the caldera that have produced pumice cones and obsidian lava flows (like Obsidian flow to the lower right), and outside the caldera forming scoria cones on its broad flanks. · Foto: Photo by Lee Siebert, 2002 (Smithsonian Institution). · Wikimedia Commons
Tipo
Volcán en escudo
País
United States
Región
North America Volcanic Regions / High Cascades Volcanic Arc
Altitud
2434 m
Coordenadas
43.722, -121.229
Última erupción
690
Contexto tectónico
Subduction zone / Continental crust (> 25 km)
Forma volcánica
Shield
Roca principal
Andesite / Basaltic Andesite
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 inglés

Newberry 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

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
9210 BCE~8880 BCE · 1 erupciones · VEI máx. ?5580 BCE~5250 BCE · 1 erupciones · VEI máx. 05250 BCE~4920 BCE · 2 erupciones · VEI máx. 34920 BCE~4590 BCE · 3 erupciones · VEI máx. 04590 BCE~4260 BCE · 1 erupciones · VEI máx. ?1620 BCE~1290 BCE · 1 erupciones · VEI máx. ?360~690 · 2 erupciones · VEI máx. 49210 BCE6900 BCE4260 BCE1950 BCE360

Línea de tiempo detallada

  1. 690 (±100 años)VEI 4Estimación geológica
    690 – En curso
    S caldera wall
  2. 490 (±100 años)VEI 4Estimación geológica
    490 – En curso
    South caldera wall
  3. 1450 a. C.VEI ?Estimación geológica
    BCE 1450 – En curso
    South of East Lake
  4. 4450 a. C.VEI ?Estimación geológica
    BCE 4450 – En curso
    Center, N & S caldera, upper SE flank
  5. 4690 a. C. (±150 años)VEI 0Estimación geológica
    BCE 4690 – En curso
    NW rift zone
  6. 4770 a. C. (±75 años)VEI ?Estimación geológica
    BCE 4770 – En curso
    NW rift zone (Sugarpine Butte)
  7. 4860 a. C. (±150 años)VEI 0Estimación geológica
    BCE 4860 – En curso
    NW rift zone
  8. 4960 a. C. (±100 años)VEI ?Estimación geológica
    BCE 4960 – En curso
    East Lake fissure, south flank
  9. 5070 a. C. (±150 años)VEI 3Estimación geológica
    BCE 5070 – En curso
    Lower NW rift zone (Lava Butte)
  10. 5260 a. C. (±150 años)VEI 0Estimación geológica
    BCE 5260 – En curso
    NW rift zone (Lava Cast Forest)
  11. 9210 a. C. (±1200 años)VEI ?Estimación geológica
    BCE 9210 – En curso
    South and east caldera rim

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.