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Mount Dana

Dana

Stratovulcano · 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
Stratovulcano
Paese
United States
Regione
Nord America / Aleutian Ridge Volcanic Arc
Altitudine
1354 m
Coordinate
55.641, -161.214
Ultima eruzione
-1890
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

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.

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1890 BCE~1890 BCE · 1 eruzioni · VEI max. 51890 BCE1890 BCE1889 BCE1889 BCE1889 BCE

Cronologia dettagliata

  1. 1890 a.C.VEI 5Stima geologica
    BCE 1890 – In corso

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