July 21-24, 1871 Nos. 219-223. GROUP OF SPRINGS upon the same level with the above great boiling spring, of less activity, but greater beauty in form and tint. William Henry Jackson; Catalog #20692d;
Photograph by Yellowstone National Park
Mammoth Hot Springs
Mammoth Hot Springs is a large complex of hot springs on a hill of travertine in Yellowstone National Park 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. Because of the huge amount of geothermal vents, travertine flourishes. Although these springs lie outside the caldera boundary, their energy has been attributed to the same magmatic system that fuels other Yellowstone geothermal areas.
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