Geyser in winter
Bildnummer 11745195
| Old Faithful. Winter view of steam rising from the world's most famous geyser,Old Faithful. Geysers (Icelandic "geysir" = gusher) consist of deep wells in geothermal rock fissures. Somewhere near the base of the well is a large chamber. The water in the chamber is heated by the surrounding rocks until it is well over normal boiling point,but is prevented from boiling by hydrostatic pressure. The heating also causes the water to expand,spilling from the lip of the well. At a critical point,the loss of water allows the hydrostatic pressure to fall to a point where the superheated water boils spontaneously and erupts. Old Faithful is in Yellowstone National Park,USA | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Fraser, Simon |
| Bildgröße: | 3399 px × 4250 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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