Reporoa Caldera

Reporoa Caldera
Reporoa Caldera Taupō Volcanic Zone, New Zealand
Highest point
Elevation	592 m (1,942 ft)
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
Geography
Location	Taupō Volcanic Zone, New Zealand
Geology
Mountain type	Caldera
Last eruption	1180 (?)

The Reporoa Caldera is a 10 km by 15 km caldera in New Zealand's Taupō Volcanic Zone. It formed some 230,000 years ago, in a large eruption that deposited approximately 100 km³ of tephra, forming the Kaingaroa Ignimbrite layer. It contains three rhyolitic lava domes (Deer Hill, Kairuru and Pukekahu) and is associated with three geothermal fields. These are the active Reporoa geothermal field in the caldera, The Waiotapu geothermal area north of the caldera rim, and the Broadlands thermal area 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 happened in the area in 1948, and smaller explosions have happened in the years between.^[1]

See also[]

• List of volcanoes in New Zealand

References[]

• "Reporoa". Global Volcanism Program. Smithsonian Institution.
• I. A. Nairn; C. P. Wood; R. A. Bailey (December 1994). "The Reporoa Caldera, Taupo Volcanic Zone: source of the Kaingaroa Ignimbrites". Bulletin of Volcanology. 56 (6): 529–537. Bibcode:1994BVol...56..529N. doi:10.1007/BF00302833. S2CID 128947835.
• S. W. Beresford; J. W. Cole (2000). "Kaingaroa Ignimbrite, Taupo Volcanic Zone, New Zealand: evidence for asymmetric caldera subsidence of the Reporoa Caldera". New Zealand Journal of Geology & Geophysics. 43 (3): 471–481. doi:10.1080/00288306.2000.9514903.

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