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Mount Dana

Dana

Estratovolcán · United States · 1354 m

Snow-covered Knutson Lake (lower left) lies within a 1.5 x 2 km wide crater of Mount Dana. Dana is a small volcano consisting of a central dome complex surrounded by a fan of volcaniclastic debris. Lava domes are along the western crater rim and inside the crater east of Knutson Lake. A major eruption about 3,840 radiocarbon years ago produced a block-and-ash flow that filled valleys south and west of the crater.
Snow-covered Knutson Lake (lower left) lies within a 1.5 x 2 km wide crater of Mount Dana. Dana is a small volcano consisting of a central dome complex surrounded by a fan of volcaniclastic debris. Lava domes are along the western crater rim and inside the crater east of Knutson Lake. A major eruption about 3,840 radiocarbon years ago produced a block-and-ash flow that filled valleys south and west of the crater. · Foto: Photo courtesy of Alaska Volcano Observatory, U.S. Geological Survey, 1973. · Wikimedia Commons
Tipo
Estratovolcán
País
United States
Región
América del Norte / Aleutian Ridge Volcanic Arc
Altitud
1354 m
Coordenadas
55.641, -161.214
Última erupción
-1890
Contexto tectónico
Subduction zone / Continental crust (> 25 km)
Forma volcánica
Composite
Roca principal
Andesite / Basaltic Andesite
Resumen geológico

Mount Dana is a small calc-alkaline volcano NE of Canoe Bay inlet at the head of Pavlof Bay consisting of an apron of volcaniclastic debris surrounding a central dome complex. The high point is located at the north rim of a 1.5 x 2 km crater, whose SW rim exposes Mesozoic sedimentary rocks. Andesitic lava domes occur on the west crater rim and as a small mound east of Knutson Lake inside the crater. Dana is the source of a mid-Holocene block-and-ash flow that reached the sea at Canoe Bay. No historical eruptions are known, but a 200-m-wide tufa mound and several cold springs are located on the SW flank.

Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
1890 BCE~1890 BCE · 1 erupciones · VEI máx. 51890 BCE1890 BCE1889 BCE1889 BCE1889 BCE

Línea de tiempo detallada

  1. 1890 a. C.VEI 5Estimación geológica
    BCE 1890 – En curso

Enlaces externos

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