Long Island

sopka – Complex, Papua New Guinea, Southwestern Pacific Volcanic Regions

Kde

Papua New Guinea, Southwestern Pacific Volcanic Regions

Typ (GVP)

Complex

Nadmořská výška

1 263 m

Tektonické prostředí

Subduction zone / Continental crust (> 25 km)

Poslední známá erupce

1993

Poloha

-5,314°, 147,105°

The broad profile of Long Island is dominated by two steep-sided stratovolcanoes, Mount Reaumur in the north and Cerisy Peak in the south. Collapse of the basaltic-andesitic volcanic complex produced a large 10 x 12.5 km caldera, now filled by Lake Wisdom. Caldera formation occurred during at least three major explosive eruptions, about 16,000, 4,000, and 300 years ago. The most recent deposited andesitic tephra across the New Guinea Highlands, prompting legends of a "Time of Darkness." Post-caldera eruptions have constructed a small cone, Motmot Island, in the south-central part of Lake Wisdom. Moderate explosive eruptions have occurred during the 20th century from vents at and near Motmot Island.

Text: Smithsonian Global Volcanism Program.

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