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Yellowstone NP, Wyoming
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The formations at Canary Spring are dynamic, with new terraces forming as mineral-laden water flows and deposits travertine over time.
The spring is named for the bright yellow color of its terraces, which is caused by thermophilic bacteria thriving in the hot water.
It is one of the many springs that make up the Mammoth Hot Springs, a major geothermal area in Yellowstone National Park.
The water temperature at Canary Spring can reach up to 163°F (73°C), making it inhospitable for most life forms except specialized bacteria.
The terraces are created by the deposition of calcium carbonate, which is carried by the hot water as it cools and evaporates.
The terraces are relatively young in geological terms, with some formations only a few decades old due to the rapid deposition of minerals.
Seasonal variations in water flow and temperature can alter the color and shape of the terraces, offering a different view throughout the year.
Thermophilic microorganisms contribute to the vibrant colors and unique textures of the terraces by thriving in the hot, mineral-rich waters.
Visitors can view Canary Spring from boardwalks that allow close observation while protecting the delicate formations.
