The colors are the result of the heat-loving bacteria...
Mammoth Hot Springs Terraces
In 1988 Yellowstone National Park suffered with more than 50 natural and man-made fires. Many of the lodge-pole pines, although dead, still stand - shallowly rooted and ready to topple. The intense heat of the fire is necessary for the pine cones to open and release the seeds for a new generation of trees... but almost 20 years on, damage is still highly visible.
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