01736oam 2200517 450 991070370150332120150618134113.0(CKB)5470000002434711(OCoLC)881832788(OCoLC)651837445(EXLCZ)99547000000243471120140626d1896 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierThe Cambrian rocks of Pennsylvania /by Charles Doolittle WalcottWashington, D.C. :Department of the Interior, United States Geological Survey,1896.Washington :Government Printing Office.1 online resource (43 pages, XV pages of plates) illustrations, mapBulletin of the United States Geological Survey ;no. 134Title from title screen (viewed June 24, 2014).Includes bibliographical references and index.GeologyPennsylvaniaGeology, StratigraphicCambrianCambrian Geologic PeriodfastGeologyfastGeology, StratigraphicfastPennsylvaniafastGeologyGeology, StratigraphicCambrian Geologic Period.Geology.Geology, Stratigraphic.Walcott Charles D(Charles Doolittle),1850-1927,81009Geological Survey (U.S.),COPCOPOCLCOOCLCEOCLCFGPOBOOK9910703701503321The Cambrian rocks of Pennsylvania3475534UNINA