Dead trees and travertine terraces at Canary Spring in winter at Mammoth Hot Springs Yellowstone National Park

Travertine; rock; calcium carbonate; ledges; terraces; Canary Spring; winter; snow; Mammoth Hot Springs; Yellowstone; National Park; Wyoming; dead; tree; Sheep Mountain; sulfur; filamentous; algae; bacteria; yellow; deposit; grow; flow; pools; steam; geothermal; heat; cyanobacteria; steps; hot; water; spring