crested pool hot spring and orange microbial mat in the old faithful geyser basin of yellowstone national park, wyoming

active algae america bacteria basin beauty blue bluesky boiling boilinghot boilinghotpool caldera chromatic colorful crestedpool crestedpoolhotspring dangerous erupting eruption evergreens exploding faithful force forest geo geology geothermal geyser geyserbasin glory grand ground heat hillside hot hotpool hotspring hotsprings landmark landscape limestone methane microbialmat microorganisms montana morning