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ハニシュ諸島

Hanish

楯状火山 · Yemen · 422m

The 20-km-long island of Hanish is seen in this composite NASA Landsat image (with north to the top). Alignment of vents along a prominent NE-SW trend gives the island its elongated shape. Short lava flows reached the coast on both sides of the island, including a very youthful flow prominent on the NW coast. Initial phreatic eruptions were followed by the formation of basaltic tuff and spatter cones that produced fluid lava flows. Suyul Hanish Island lies at the bottom center, and other offshore island lie along the regional NE-SW trend.
The 20-km-long island of Hanish is seen in this composite NASA Landsat image (with north to the top). Alignment of vents along a prominent NE-SW trend gives the island its elongated shape. Short lava flows reached the coast on both sides of the island, including a very youthful flow prominent on the NW coast. Initial phreatic eruptions were followed by the formation of basaltic tuff and spatter cones that produced fluid lava flows. Suyul Hanish Island lies at the bottom center, and other offshore island lie along the regional NE-SW trend. · 写真: NASA Landsat 7 image (worldwind.arc.nasa.gov) · Wikimedia Commons
タイプ
楯状火山
国
Yemen
地域
Eastern Africa Volcanic Regions / Red Sea Rift Volcanic Province
標高
422m
座標
13.720, 42.730
最終噴火
不明
テクトニクス環境
Rift zone / Oceanic crust (< 15 km)
火山地形
Shield
主要岩石
Basalt / Picro-Basalt
地質学的概要

The Hanish Islands are formed from a series of volcanic vents along a NE-SW trend, and include the Holocene Great Hanish, Little Hanish, and many other small islands and submarine shoals. The Zukur-Hanish island group lies in shallow waters S of the Red Sea median trough. Spatter cones, cinder cones, and ash cones line the crest of the 20-km-long Great Hanish Island. Short lava flows reach the coast on both sides of the island. Initial eruptions were phreatic, followed by the formation of basaltic cinder cones, spatter cones, and fluid lava flows.

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要約が短いです。詳細は記事全文をご覧ください。

ハニシュ諸島 は、紅海に浮かぶ島々からなる諸島。大部分はイエメンのフダイダ県に属している。

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