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Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13421
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13425
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Castle Geyser (during steam phase, not eruption) with the colorful bacteria mats of Tortoise Shell Spring in the foreground. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13427
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA |
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Tortoise Shell Spring bubbles in front of the sinter cone of Castle Geyser. Upper Geyser Basin.
Image ID: 13428
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Tortoise Shell Spring bubbles in front of the sinter cone of Castle Geyser. Upper Geyser Basin.
Image ID: 13429
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Tortoise Shell Spring bubbles in front of the sinter cone of Castle Geyser. Upper Geyser Basin.
Image ID: 13430
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA |
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Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13437
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13443
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13444
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA |
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Belgian Spring, near the Grand Group.
Image ID: 13462
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Beryl Spring is superheated with temperatures above the boiling point.
Image ID: 13464
Location: Yellowstone National Park, Wyoming, USA | Beryl Spring is superheated with temperatures above the boiling point.
Image ID: 13465
Location: Yellowstone National Park, Wyoming, USA |
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Beryl Spring is superheated with temperatures above the boiling point.
Image ID: 13466
Location: Yellowstone National Park, Wyoming, USA | Beryl Spring is superheated with temperatures above the boiling point.
Image ID: 13467
Location: Yellowstone National Park, Wyoming, USA | Emerald Spring, with its sulfur-lined sides, displays a deep green color, the result of its clear water (which would otherwise display as blue) and the deep yellow coloration of its sulfur lining.
Image ID: 13468
Location: Norris Geyser Basin, Yellowstone National Park, Wyoming, USA |
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Avoca Spring.
Image ID: 13492
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA | Black Opal Spring.
Image ID: 13493
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA | Wall Pool.
Image ID: 13494
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA |
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Sapphire Pool, Biscuit Basin. Sapphire Pool is known as a hot spring but has erupted as a geyser in the past.
Image ID: 13495
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA | Sapphire Pool, Biscuit Basin. Sapphire Pool is known as a hot spring but has erupted as a geyser in the past.
Image ID: 13496
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA | Sapphire Pool, Biscuit Basin. Sapphire Pool is known as a hot spring but has erupted as a geyser in the past.
Image ID: 13497
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA |
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Shell Spring (Shell Geyser) erupts almost continuously. The geysers opening resembles the two halves of a bivalve seashell, hence its name. Biscuit Basin.
Image ID: 13498
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA | Shell Spring (Shell Geyser) erupts almost continuously. The geysers opening resembles the two halves of a bivalve seashell, hence its name. Biscuit Basin.
Image ID: 13499
Location: Biscuit Basin, Yellowstone National Park, Wyoming, USA | Emerald Pool.
Image ID: 13507
Location: Black Sand Basin, Yellowstone National Park, Wyoming, USA |
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A visitor photographs Emerald Pool.
Image ID: 13508
Location: Black Sand Basin, Yellowstone National Park, Wyoming, USA | Emerald Pool.
Image ID: 13509
Location: Black Sand Basin, Yellowstone National Park, Wyoming, USA | Green Spring.
Image ID: 13512
Location: Black Sand Basin, Yellowstone National Park, Wyoming, USA |
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Silex Spring gets its name from the silica which is prevalent in the surrounding volcanic rocks and which is dissolved by the superheated water of Silex Spring. Silex is latin for silica. Lower Geyser Basin.
Image ID: 13524
Location: Lower Geyser Basin, Yellowstone National Park, Wyoming, USA | Silex Spring gets its name from the silica which is prevalent in the surrounding volcanic rocks and which is dissolved by the superheated water of Silex Spring. Silex is latin for silica. Lower Geyser Basin.
Image ID: 13525
Location: Lower Geyser Basin, Yellowstone National Park, Wyoming, USA | Firehole Spring bubbles and splashes continuously as superheated steam rises through the pool. Firehole Spring is located along Firehole Lake Drive.
Image ID: 13536
Location: Lower Geyser Basin, Yellowstone National Park, Wyoming, USA |
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