Image
This small lake lies in the crater of White Island volcano. The distinctive green is caused by sulfur, along with extremophilic micro-organisms. The water is highly acid, with a pH of about 1, and an elevated temperature of about 50°C.
Te whakamahi i tēnei tūemi
Reference: CN44177/14
by Lloyd Homer
Permission of GNS Science must be obtained before any use of this image.