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Hot sulphur spring water is formed by the less violent manifestation of volcanic areas, even when the volcanoes are no longer active. They represent the final stage of heat loss by igneous (crystalline rock), masses beneath off high temperature vapor and gases while slowly cooling down. This gaseous phase is composed of primarily of overheated steam that losses part of its heat while coming up to the surface and expands and is transformed into water, forming hot water spring. |
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