Reporoa

sopka (bez známé erupce za posledních ~12 000 let), New Zealand, Tonga-Kermadec Volcanic Regions

Kde

New Zealand, Tonga-Kermadec Volcanic Regions

Typ (GVP)

Caldera

Nadmořská výška

592 m

Poloha

-38,420°, 176,330°

The 10 x 15 km Reporoa caldera, occupying the Reporoa-Broadlands basin, lies near the W margin of the Taupo volcanic zone SSW of the Okataina volcanic center. The caldera formed about 230,000 years ago during the eruption of the voluminous ~100 km3 Kaingaroa Ignimbrite. Large slump scarps cut the N caldera rim; the S rim is buried by sediments. The Deer Hill rhyolitic lava dome was erupted after the caldera's S rim collapse; two other rhyolitic domes, Kairuru and Pukekahu, were emplaced within the caldera along a possible ring fault. The active Reporoa hydrothermal field lies within the caldera, and the Waiotapu and Broadlands (Ohaki) hydrothermal fields lie N and S of the poorly defined caldera margin. Eruptions within the caldera have not occurred since the late Pleistocene, but large hydrothermal explosions occurred at the Waiotapu thermal area immediately to the N at the time of the Kaharoa eruption of neighboring Tarawera volcano about 770 years ago.

Text: Smithsonian Global Volcanism Program.

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