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Belknap Crater

Belknap

Vulcano a scudo · United States · 2094 m

The McKenzie Pass area in the central Oregon Cascades contains one of the largest concentrations of recent volcanism in the United States. Belknap shield volcano, seen here from Black Crater to the SE, is capped by a smaller snow-covered cone. Lava flows from Belknap and the smaller Little Belknap shield volcano in front of it cover nearly 100 km2. Most of the largely unvegetated flows were erupted between about 2,900 and 1,500 years ago.
The McKenzie Pass area in the central Oregon Cascades contains one of the largest concentrations of recent volcanism in the United States. Belknap shield volcano, seen here from Black Crater to the SE, is capped by a smaller snow-covered cone. Lava flows from Belknap and the smaller Little Belknap shield volcano in front of it cover nearly 100 km2. Most of the largely unvegetated flows were erupted between about 2,900 and 1,500 years ago. · Foto: Photo by Lee Siebert, 1995 (Smithsonian Institution). · Wikimedia Commons
Tipo
Vulcano a scudo
Paese
United States
Regione
North America Volcanic Regions / High Cascades Volcanic Arc
Altitudine
2094 m
Coordinate
44.285, -121.842
Ultima eruzione
475
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Shield
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The Belknap Crater area near McKenzie Pass in Oregon, north of the Three Sisters volcanoes, was the source of one of the largest concentrations of youthful volcanism in the Cascade Range. The basaltic to basaltic andesite Belknap shield volcano, topped by the Belknap Crater pyroclastic cone and the Little Belknap shield volcano immediately to the east, have produced widespread late Holocene lava flows on all sides, much of which took place between about 3,000 and 1,500 years ago. Eruptions from the NE base of Belknap crater produced lava flows that traveled 15 km W into the McKenzie River valley.

Sintesi da Wikipedia

Riassunto in inglese

Belknap Crater is a shield volcano in the Cascade Range in the U.S. state of Oregon. Located in Linn County, it is associated with lava fields and numerous subfeatures including the Little Belknap and South Belknap volcanic cones. It lies north of McKenzie Pass and forms part of the Mount Washington Wilderness. Belknap is not forested and most of its lava flows are not vegetated, though there is some wildlife in the area around the volcano, as well as a number of tree molds formed by its eruptive activity.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
5050 BCE~4853 BCE · 1 eruzioni · VEI max. ?1104 BCE~906 BCE · 1 eruzioni · VEI max. 0709 BCE~512 BCE · 1 eruzioni · VEI max. 2278~475 · 1 eruzioni · VEI max. 25050 BCE3669 BCE2287 BCE1104 BCE278

Cronologia dettagliata

  1. 475 (±215 anni)VEI 2Stima geologica
    475 – In corso
    Belknap Crater
  2. 685 a.C. (±50 anni)VEI 2Stima geologica
    BCE 685 – In corso
    South Belknap and Twin Craters
  3. 1071 a.C. (±241 anni)VEI 0Stima geologica
    BCE 1071 – In corso
    Little Belknap
  4. 5050 a.C.VEI ?Stima geologica
    BCE 5050 – In corso

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.