Ficheiro:FossilTreesSpecimenRidgeYNP1890.jpg

Summary

Description English: Yellowstone National Park, Wyoming. Fossil tree trunks pilyoxylon aldersoni in Fossil Forest on Specimen Ridge. Two fine specimens of fossil trees exposed on a steep hillside by the erosion of the basic breccia in which roots are firmly embedded. Nearby is a bold cliff, showing the character of the breccia and the manner in which it has been deposited. Circa 1890. Figure 2, U.S. Geological Survey Folio 30. Date 1890 Source Downloaded from USGS Photo Library: http://libraryphoto.cr.usgs.gov/htmllib/batch82/batch82j/batch82z/batch82/ijp00325.jpg Author J. P. Iddings

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