カーボベルデ · 成層火山
ブラヴァ島
Brava
- タイプ
- 成層火山
- 標高
- 956m
- 最終噴火
- 不明
- タイプ
- 成層火山
- 国
- カーボベルデ
- 地域
- 北アフリカ / Cape Verde Hotspot Volcano Group
- 標高
- 956m
- 座標
- 14.851, -24.704
- 最終噴火
- 不明
- テクトニクス環境
- プレート内部 / 中間地殻 (15-25 km)
- 火山地形
- 複成火山
- 主要岩石
- フォイダイト
地質学的概要
Brava Island, 18 km W of Fogo, is the westernmost of the southern Cape Verde islands. The 10-km-wide island contains 15 morphologically youthful craters located along two or three lineaments intersecting along the crest of the island. Most of the younger eruptions originated from the interaction of phonolitic magmas with a large groundwater reservoir contained within an older volcanic series characterized by thick welded ignimbrites and block-and-ash flow deposits. Carbonatitic lavas are also found.
Wikipedia の要約
英語版の要約Brava is an island in Cape Verde, and is part of the Sotavento group, in the central Atlantic Ocean. At 62.5 km2 (24.1 sq mi), it is the smallest inhabited island of the Cape Verde archipelago, but at the same time the greenest. First settled in the early 16th century, its population grew after Mount Fogo on neighbouring Fogo erupted in 1680. For more than a century, its main industry was whaling, but the island economy is now primarily agricultural.
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