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Copyright © 2009, Antonio J. Quezon
Thermophile and runoff from Midway Geyser Basin
Midway Geyser Basin and Firehole River, Yellowstone National Park, Wyoming, U.S.A., September 29, 2009
Canon EOS 30D, Focal length = 28 to 105 mm, Equivalent ISO = 400, Exposure = 1/800 s, f/8
