Colored thermophilic bacteria, outlet of the Cliff Geyser, Firehole River, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

america american area areas bacteria bacteria bacteriology bacterium bank banks basin biology black bodies body brown cliff colored colored colorful coloured colourful conservation day daylight daytime detail details discolored discoloured during energy exterior exteriors firehole geologic geological geologically geology geothermal geothermic germs geyser geyser geysers heat hot hot spring hot springs microbiology national national natural nature nobody north of outdoor outlet park park parks photo photos power preserve preserves reserve reserves river sanctuaries sanctuary sand shore shores shot shots source sources spring springs states the thermal thermophilic united upper us us american usa warm warmness warmth water waters waterside watersides well wells wildlife wyoming yellowstone