Reporoa caldera

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Reporoa caldera
Reporoa caldera is located in North Island
Reporoa caldera
Reporoa caldera
Taupo Volcanic Zone, New Zealand
Elevation 592 m (1,942 ft)
Location
Coordinates 38°25′00″S 176°20′00″E / 38.41667°S 176.33333°E / -38.41667; 176.33333Coordinates: 38°25′00″S 176°20′00″E / 38.41667°S 176.33333°E / -38.41667; 176.33333
Geology
Type Caldera
Last eruption 1180 (?)

The Reporoa caldera is a 10 km by 15 km caldera in New Zealand's Taupo Volcanic Zone. It formed some 230,000 years ago, in a large eruption that deposited the approximately 100 km3 Kaingaroa Ignimbrites. It contains three rhyolitic lava domes (Deer Hill, Kairuru and Pukekahu) and the active Reporoa geothermal field. The Waiotapu geothermal area lies just north of the caldera rim, while the Broadlands thermal area lies to the south. The Waikato River runs through the southern half of the caldera.

In April 2005, a large hydrothermal explosion occurred in a cow paddock within the caldera, creating a 50-metre crater. A similar explosion took place in the area in 1948, and smaller explosions have occurred in the intervening years.[1]

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