North Gorda Ridge Segment

アメリカ合衆国 · 割れ目火口

North Gorda Ridge Segment

タイプ: 割れ目火口
標高: 3000m (海底)
最終噴火: 1996年

This lava flow was erupted in 1996 along the North Gorda Ridge, the northernmost of five segments of the Gorda Ridge located immediately south of the Blanco Transform Fault, which offsets the Gorda and Juan de Fuca spreading ridges. Submarine cameras revealed new lava flows about 100-200 m wide along a fissure that was at least 3.5 km long. The 65-km-long North Gorda Ridge segment is located about 200 km W of the southern Oregon coast and has an hourglass shape in plan view, with a shallower narrow axial valley at the center. · 写真: Image courtesy of National Oceanic and Atmospheric Administration, 1996 (http://www.pmel.noaa.gov/vents/home.html).

タイプ: 割れ目火口
国: アメリカ合衆国
地域: 東太平洋 / Northeast Pacific Rifts Volcanic Province
標高: 3000m (海底)
座標: 42.670, -126.780
最終噴火: 1996年
テクトニクス環境: リフト帯 / 海洋地殻 (< 15 km)
火山地形: 火山群
主要岩石: 玄武岩 / ピクライト質玄武岩

地質学的概要

英語の原文

The northernmost of five segments of the Gorda Ridge lies immediately south of the Blanco Transform Fault that offsets the Gorda and Juan de Fuca oceanic spreading ridges.

出典：Global Volcanism Program, Smithsonian Institution（抜粋） · GVP で全文を読む →