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In the 1886 eruption of Mount Tarawera (flat-topped mountain at far end of the lake), a rift more than 10 miles long tore through the floor of Lake Rotomahana and beyond. In the years after the eruption, a new geothermal field known as "Waimungu" formed on land near the southwestern end of the lake. The steaming green pool in the foreground is part of that field. A scientific expedition in 2011 found parts of the Pink Terraces, long buried by mud and submerged, in the bay-like area of the lake at left in this photograph. The three plumes of steam rising from fumaroles along the shore are probably remnants of the Pink Terraces geothermal system. (Photo by Lloyd Homer © Institute of Geological and Nuclear Sciences Limited)[back]
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