GC3M809 ▼
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Additional Information National Park interpretive signage The Geysers of Yellowstone http://yellowstone.net/geysers/norris-geyser-basin/ Yellowstone National Park Thermal Features http://www.rcn.montana.edu/resources/features/feature.aspx?nav=11&id=6301 Porkchop Geyser http://www.nps.gov/yell/photosmultimedia/norris-tour-porkchop-geyser.htm Notable Changes in Thermal Activity at Norris Geyser Basin http://volcanoes.usgs.gov/yvo/2003/NorrisTherm03.html Good Luck!
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