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Where the earth bleeds heat

Umnak Island is dotted with a number of dramatic hotsprings, steam vents, and geysers. The heat released at these vents represents a huge amount of energy. Heat that came from radioactive decay deep in the earth long ago, carried to near the surface by flowing magma and then superheated water.
— Umnak Island is dotted with a number of dramatic hotsprings, steam vents, and geysers. The heat released at these vents represents a huge amount of energy. Heat that came from radioactive decay deep in the earth long ago, carried to near the surface by flowing magma and then superheated water.

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By Ground Truth Trekking

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