Keywords: FossilTreeSpecimenRidgeYNP1890.jpg en Yellowstone National Park Wyoming Specimen Ridge looking west to Junction Butte Petrified tree trunk Pityoxylon amethstinum in Fossil Forest Circa 1890 Plate 107 U S Geological Survey Monograph 32 part 2 Downloaded from USGS Photo Library http //libraryphoto cr usgs gov/htmllib/batch82/batch82j/batch82z/batch82/ijp00328 jpg J P Iddings 1890 PD-USGov Mountains of Yellowstone Mountains of Wyoming Rock formations in Wyoming Specimen Ridge Petrified trees in Yellowstone National Park |