Geyser field. Steam rising from hot pools in the Tatio geyser field,Chile,during early morning when the eruptions are at their peak. Geysers are deep natural wells in geothermal rock fissures. Their water lies in a large chamber at the well's base. The water is heated by surrounding rocks until it is well over its normal boiling point,but is prevented from boiling by hydrostatic pressure. At a critical temperature,the super- heated water spontaneously boils,causing an eruption | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Zephyr |
Taille de l’image : | 3200 px × 4755 px |
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