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Tahalra Volcanic Field

火山原 · Algeria · 1467m

The dark-green and bluish-gray areas extending across this NASA Landsat false-color image depict the elongated, E-W-trending Tahalra volcanic field, which covers an area of about 1,800 km2 in the Hoggar Province of southern Algeria. About 100 small basaltic cones formed during the Pliocene and Pleistocene, and the most recent activity during the late-Pleistocene and Holocene, produced about 20 maars and cones along the northern margin of the volcanic field.
The dark-green and bluish-gray areas extending across this NASA Landsat false-color image depict the elongated, E-W-trending Tahalra volcanic field, which covers an area of about 1,800 km2 in the Hoggar Province of southern Algeria. About 100 small basaltic cones formed during the Pliocene and Pleistocene, and the most recent activity during the late-Pleistocene and Holocene, produced about 20 maars and cones along the northern margin of the volcanic field. · 写真: NASA Landsat 7 image (worldwind.arc.nasa.gov) · Wikimedia Commons
タイプ
火山原
国
Algeria
地域
Northern Africa Volcanic Regions / West Central Sahara Volcanic Province
標高
1467m
座標
22.670, 5.000
最終噴火
不明
テクトニクス環境
Intraplate / Continental crust (> 25 km)
火山地形
Cluster
主要岩石
Trachybasalt / Tephrite Basanite
地質学的概要

The large E-W elongated Tahalra volcanic field covers an area of about 1,800 km2 in the Hoggar Province of southern Algeria. It lies WSW of the town of Tamanrasset and was active from the Miocene to the Holocene, producing alkaline Strombolian cones and lava flows. The field was constructed over Precambrian metamorphic and plutonic rocks of the Tuareg shield. A dozen trachytic-to-rhyolitic lava domes and spines formed during the Pliocene, and Pliocene-to Pleistocene activity formed about 100 small basaltic (mostly basanitic) cones. The most recent activity, during the Pleistocene and Holocene, produced about 20 maars and cones along the northern margin.

噴火履歴

詳細タイムライン

噴火記録はありません。

外部リンク

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