Bacterial mats in runoff water, Midway Geyser Basin, Yellowstone NP, Wyoming, USA

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Photo credit: © Duncan Usher / Alamy / Afripics
License: Licensed
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Keywords: active, activity, attraction, bacteria, bacterial, basin, colorful, geyser, landscape, mats, midway, national, np, park, runoff, seismic, tourism, tourist, usa, volcanic, volcano, water, wyoming, yellowstone