Emerald Pool Geyser, drainage area, colored thermophilic bacteria, microorganisms, geothermal sources, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

above america american angle area areas bacteria basin black colored colorful coloured colourful conservation day daylight daytime discolored discoloured drainage during elevated emerald energy exterior exteriors from geologic geological geologically geology geothermal geothermic geyser geyser geysers green heat heritage high high angle hot hot spring hot springs microorganisms mineral minerals national national natural nature nobody north of orange outdoor park park parks perspective perspectives photo photos pool power preserve preserves reserve reserves sanctuaries sanctuary sand sediment sedimentation sediments shot shots source sources spring springs states the thermal thermophilic top topview topviews unesco united upper us us american usa view views water well wells wildlife world wyoming yellow yellowstone