Miravalles

sopka – Stratovolcano, Costa Rica, Middle America-Caribbean Volcanic Regions

Kde

Costa Rica, Middle America-Caribbean Volcanic Regions

Typ (GVP)

Stratovolcano

Nadmořská výška

2 028 m

Tektonické prostředí

Subduction zone / Continental crust (> 25 km)

Poslední známá erupce

1946

Poloha

10,748°, -85,153°

Miravalles is an andesitic stratovolcano that is one of five post-caldera cones along a NE-trending line within the broad 15 x 20 km Guayabo (Miravalles) caldera. The caldera was formed during several major explosive eruptions that produced voluminous dacitic-rhyolitic pyroclastic flows between ~1.5 and 0.6 million years ago. Growth of post-caldera volcanoes in the eastern part of the caldera that overtopped much of the eastern and southern caldera rims was interrupted by edifice collapse which produced a major debris avalanche to the SW. Morphologically youthful lava flows cover the W and SW flanks of the post-caldera Miravalles complex, which rises above the town of Guayabo on the flat western caldera floor. A small steam explosion on the SW flank was reported in 1946. High heat flow remains, and it is the site of a large developed geothermal field.

Text: Smithsonian Global Volcanism Program.

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