アメリカ合衆国 · 成層火山
Yantarni Volcano
Yantarni
- タイプ
- 成層火山
- 標高
- 1345m
- 最終噴火
- -800年
- タイプ
- 成層火山
- 国
- アメリカ合衆国
- 地域
- 北アメリカ / Alaska Peninsula Volcanic Arc
- 標高
- 1345m
- 座標
- 57.019, -157.185
- 最終噴火
- -800年
- テクトニクス環境
- 沈み込み帯 / 大陸地殻 (> 25 km)
- 火山地形
- 複成火山
- 主要岩石
- 安山岩 / 玄武岩質安山岩
地質学的概要
Yantarni is a small andesitic stratovolcano located between Aniakchak caldera and Chiginadak volcanoes that was not discovered until 1979. A large breached crater on the NE side, formed by collapse of the summit about 2000-3500 years ago, contains a lava dome that marks the summit. This eruption, which resembled that of Mount St. Helens in 1980, began with a debris avalanche produced by the edifice collapse that was accompanied by a possible lateral blast and followed by the emplacement of 1 km3 of pyroclastic flows related to growth of the summit lava dome.
Wikipedia の要約
英語版の要約Yantarni Volcano is an andesitic stratovolcano in the U.S. state of Alaska. It is on the Alaska Peninsula, in the Aleutian Range, between Mount Aniakchak and Mount Chiginagak volcanoes. The volcano was not discovered until 1979 due to its remote location, lack of documented historic activity, and its rather modest summit elevation. The mountain was named after nearby Yantarni Bay, which in turn was named by Russian explorers after the abundance of amber in the area.
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噴火履歴
1件の記録用語集詳細タイムライン
- 紀元前 800年 (±500年)VEI 5地質学的推定紀元前 800 ~ 終了日不明
近くの火山
外部リンク
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