When hot geothermal water reaches the surface, it cools rapidly and deposits dissolved silica as sinter. This fine-grained silica will coat any surface, and is shown here growing over vegetation at Waimangu, south of Rotorua. If these deposits continue for several years, a sinter terrace will gradually build up.
Te whakamahi i tēnei tūemi
Private collection
Photograph by Simon Nathan
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