Dead trees and steaming turquoise pool at the Main Terrace at Mammoth Hot Springs Yellowstone Park in winter

Dead; trees; steaming; turquoise; blue; green; pool; pools; Main Terrace; Mammoth Hot Springs; Yellowstone; winter; travertine; rock; calcium carbonate; ledges; terraces; snow; National Park; Wyoming; tree; Sheep Mountain; sulfur; filamentous; algae; bacteria; yellow; deposit; grow; flow; pools; steam; geothermal; heat; cyanobacteria; steps; hot; water; spring; clouds; mountains; mineral; limestone; microbes; microorganisms