$100.00 – $1,500.00
As it cools in a runoff channel on the south side of Doublet Pool hot water deposits silicates called sinter. The warm water supports thermophiles or heat loving organisms. Thermophiles in Yellowstone's alkaline or acidic waters are decendents of similar organisms evolved from some of the earliest life to appear on earth approximately four billion years ago. The colors are exhibited by different species living in sometimes extremely harsh environments up to 90º C (194ºF) and with a highly acidic pH from .9 to 5.8. The diagonal lines illustrate the ripples and miniature hydrodynamic forces of water flowing over an uneven surface.