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タウ島

Ta'u

楯状火山 · United States · 931m

Sheer, forested cliffs form the southern side of Ta'u Island at the eastern end of the Samoan Islands. Partial collapse of the shield volcano formed a large arcuate depression open to the S. The 6 x 10 km Island is the emergent portion of the large Lata shield volcano, which also contains numerous Holocene post-caldera cones at the summit and flanks.
Sheer, forested cliffs form the southern side of Ta'u Island at the eastern end of the Samoan Islands. Partial collapse of the shield volcano formed a large arcuate depression open to the S. The 6 x 10 km Island is the emergent portion of the large Lata shield volcano, which also contains numerous Holocene post-caldera cones at the summit and flanks. · 写真: Photo by John Brooks, 1992 (U. S. National Park Service). · Wikimedia Commons
タイプ
楯状火山
国
United States
地域
Southern Pacific Volcanic Regions / Samoan Hotspot Volcano Group
標高
931m
座標
-14.230, -169.454
最終噴火
不明
テクトニクス環境
Subduction zone / Oceanic crust (< 15 km)
火山地形
Shield
主要岩石
Basalt / Picro-Basalt
地質学的概要

The 10-km-wide Ta'u Island, located at the E end of the Samoan islands, is ringed by sea cliffs. It is the emergent portion of the large Lata shield volcano. A major flank collapse event around 22 ka resulted in the steep scarps on the southern side of the island. Two smaller shields were constructed along rift zones at the NW and NE tips of the island. The NW corner of the island has a tuff-cone complex that ejected large dunite xenoliths and coral blocks. Numerous Holocene post-caldera cones occur at the summit and on the flanks.

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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