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Yellowstone and the Tetons



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Old Pro Does It Again
Photograph by José Azel

A 60-to-90-foot (20-to-30-meter) jet of steam erupts every 10 to 12 hours from Castle Geyser in Upper Geyser Basin. Some 300 geysers boil and bubble throughout the park. Heavily layered with a silica-rich mineral formed from volcanically heated underground water, Castle may have been erupting for 15,000 years, one of Yellowstone's oldest geysers.

Photo Fast Facts

Camera: Canon F1N
Film Type: Fujichrome Velvia 50
Lens: Canon 14mm
Speed and F-Stop: Unrecorded
Weather Conditions: Clear
Time of Day: Sunrise
Lighting Techniques: Natural light


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