The Terraces at mammoth Hot Springs

Volcanic steam pushes up through the rock to release calcium which forms travertine and the terraces. The process is on going and this scene changes daily. The dark colored stripes are made by "thermophiles" heat loving organisms.

9234Mammoth Hot SpringsMontanaYellowstonegeologic featuresaltssteamtravertinecalciumterraces

From Yellowstone in March