• Winter visitors watching geysers erupting

    Yellowstone

    National Park ID,MT,WY

Inside Yellowstone - Petrified Trees

 

More Information

Tower-Roosevelt Area Natural Highlights
http://www.nps.gov/yell/planyourvisit/ntower.htm

Earth History Research Center on Petrified Trees
http://origins.swau.edu/papers/dinos/yellowstone/default.html

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