Mt. Erebus Antarctic expedition 2007 - Image 35 of 58

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Mt. Erebus is one of the few places on Earth where the right conditions are given so that ice towers can form. The volcano’s heat generates a so called “hydrothermal system” inside the volcano by melting snow that falls into the crater, and transports it as water vapour to the volcano’s flanks. The cold Antarctic air at almost 4000 m altitude is cold enough to instantly freeze the escaping vapour.