Angel Terrace, Yellowstone NP, 20th Century
Postcard of Angel Terrace photographed by Frank J. Haynes, no date. Known both for the pure white formations and colorful microorganisms of its active periods, Angel Terrace is one of the area's most unpredictable features. For decades it was dry and crumbling. More recently, hot springs have been intermittently active in parts of the formation. Mammoth Hot Springs is a large complex of hot springs on a hill of travertine in Yellowstone NP adjacent to Fort Yellowstone and the Mammoth Hot Springs Historic District. It was created over thousands of years as hot water from the spring cooled and deposited calcium carbonate (over two tons flow into Mammoth each day in a solution). Although these springs lie outside the caldera boundary, their energy has been attributed to the same magmatic system that fuels other Yellowstone geothermal areas. Yellowstone National Park is a national park located primarily in the state of Wyoming, although it also extends into Montana and Idaho.
Size: 4200px × 2789px
Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
Model Released: No
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