Koniuji

sopka – Stratovolcano, United States, North America Volcanic Regions

Kde

United States, North America Volcanic Regions

Typ (GVP)

Stratovolcano

Nadmořská výška

273 m

Tektonické prostředí

Subduction zone / Intermediate crust (15-25 km)

Poslední známá erupce

1 150 př. n. l.

Poloha

52,220°, -175,130°

The very small, 1 x 1.5 km Koniuji Island, between Atka and Kasatochi volcanoes, is the emergent top of a mostly submarine volcano. Located about 20 km N of the western side of Atka Island, the volcano is deeply dissected, with a steep, arcuate cliff on the west. Ar-Ar dating indicates that the island emerged above sea level about 15,000 years ago, and that several lava flows and domes were erupted during the Holocene. The summit lava dome is younger than about 3,000 years. Reports of observed eruptive activity may be erroneous, and are considered to refer to eruptions of the relatively undissected Kasatochi, 25 km W.

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.