Rotorua Caldera

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Rotorua
Lake rotorua.jpg
NASA image of Lake Rotorua and caldera
Elevation 757 m (2,484 ft)
Location
Location North Island, New Zealand
Coordinates 38°05′S 176°16′E / 38.08°S 176.27°E / -38.08; 176.27
Geology
Type Caldera
Volcanic arc/belt Taupo Volcanic Zone
Last eruption <25,000 years ago[1]

The Rotorua Caldera is one of several large volcanoes located in the Taupo Volcanic Zone on the North Island of New Zealand. Its last major eruption was about 240,000 years ago. At this time, the Mamaku ignimbrite, covering about 4000 square km, was deposited. After the eruption, the magma chamber underneath the volcano collapsed. The circular depression left behind is the current caldera, about 22 km (14 mi) in diameter and now occupied by Lake Rotorua. Mokoia Island, close to the centre of the lake, is a rhyolite dome. There are other domes like Hinemoa Point, Ngongotaha, Pohaturoa and Pukeroa. The most recent magmatic eruption occurred less than 25,000 years ago, creating some of the smaller lava domes.[1] There is also much geothermal activity.

Downtown Rotorua, Lake Rotorua, and Mokoia Island

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