Emmons Lake Volcanic Center

sopka – Caldera, United States, North America Volcanic Regions

Kde

United States, North America Volcanic Regions

Typ (GVP)

Caldera

Nadmořská výška

1 534 m

Tektonické prostředí

Subduction zone / Continental crust (> 25 km)

Poloha

55,352°, -162,045°

The Emmons Lake Volcanic Center, located north of Volcano Bay and SW of Pavlof volcano, includes the Emmons and Hague stratovolcanoes within the Emmons Lake caldera. The 9 x 15 km caldera contains a narrow elongated lake at its SW end that drains through a breach in the SE rim to the Pacific Ocean. The compound caldera was formed during six voluminous dacitic-to-rhyolitic eruptions between about 294,000 and 26,000 years ago that produced extensive ashflow tuffs. Mount Emmons, Mount Hague, and Double Crater are post-caldera cones of dominantly basaltic composition that were constructed along the SW-NE trend of the elongated caldera. Some Holocene flows have moved through a gap in the southern caldera rim to within 3 km of the ocean. A large fumarolic area is located on the south side of Mount Hague, and the only reported activity was the emission of steam plumes from Hague in 1990 and 1991.

Text: Smithsonian Global Volcanism Program.

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