Tortoise Shell Spring and Castle Geyser, #13427

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. Yellowstone National Park, Wyoming, USA, natural history stock photograph, photo id 13427
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. Yellowstone National Park, Wyoming, USA

This image is featured in: Photo of Castle Geyser, Yellowstone National Park

Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13427
Format: Digital 3:2
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