Opal Pool Site Yellowstone National Park ~ Wyoming

Here one can take in the wonderous view of Opal Pool, a beautiful green-blue pool set in a massive area of travertine buildup.

*Thermal water rises through the limestone, carrying high amounts of the dissolved limestone (calcium carbonate). At the surface, carbon dioxide is released, and calcium carbonate is deposited, forming travertine, the chalky white mineral forming the rock of travertine terraces.

 

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