alternative energy
bacteria
brown
carbonate
environment
extreme environments
geothermal
geothermal energy
ground water
horizontal
hot springs
hydrothermal
limestone
mammoth hot springs
microorganisms
nature
no people
outdoors
pools
sustainable energy
thermal area
thermal spring
thermophiles
travertine
western usa
wyoming
yellowstone national park
定額
Brown and amber geothermal pool of hot water, with crusty carbonate deposits overlying the travertine rock of Mammoth Hot Springs in Yellowstone National Park, Wyoming.の素材 [FY31050771528]
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