Giggenbach

sopka – Stratovolcano, New Zealand, Tonga-Kermadec Volcanic Regions

Kde

New Zealand, Tonga-Kermadec Volcanic Regions

Typ (GVP)

Stratovolcano

Nadmořská výška

-65 m

Tektonické prostředí

Subduction zone / Oceanic crust (< 15 km)

Poloha

-30,036°, -178,712°

Giggenbach, named after volcano gas geochemist Werner Giggenbach, is a basaltic-to-dacitic submarine volcano about 30 km NW of Macauley volcano. The flat summit reaches to within 65 m of the ocean surface, has a 700-m-wide crater containing a central cone, and is cut by numerous small explosion pits and craters. Much of the edifice is covered by dacitic pumice, and several edifice-collapse scarps cut its flanks. Large cones are found on the ENE and SSW flanks, and a chain of eight small cones that fed recent andesitic-dacitic lava flows lies on the west flank. A large hydrothermal vent field was found within the summit crater.

Text: Smithsonian Global Volcanism Program.

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