Mount Dana
Dana
成層火山 · United States · 1354m

- タイプ
- 成層火山
- 国
- United States
- 地域
- North America Volcanic Regions / Aleutian Ridge Volcanic Arc
- 標高
- 1354m
- 座標
- 55.641, -161.214
- 最終噴火
- -1890年
- テクトニクス環境
- Subduction zone / Continental crust (> 25 km)
- 火山地形
- Composite
- 主要岩石
- Andesite / Basaltic Andesite
地質学的概要
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.
Wikipedia の要約
英語版の要約Mount Dana is a small stratovolcano of the Alaska Peninsula, United States, located northeast of Canoe Bay inlet at the head of Pavlof Bay. It was the source for a major eruption about 3840 years ago that produced a pyroclastic flow that filled valleys south and west of the volcano's crater and reached the sea at Canoe Bay.
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噴火履歴
詳細タイムライン
- 紀元前 1890年VEI 5地質学的推定BCE 1890 ~ 進行中
外部リンク
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