Bacterial mat, Upper Old Faithful Basin, Yellowstone NP
Canon EOS 40D, f/13 @ 20 mm, 1/500, ISO 400, No Flash
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Keywords:Algae, Bacteria Mat, Bacterial Mat, Landscape, Mountain States, North America, Old Faithful Upper Geyser Basin, Thermal Feature, United States, WY, Wyoming, Yellowstone National Park, 40d002-#6291
