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abstract Alaska Range America American oil fields anticline April Assoc August Basin beds Bull Calif California Canada Canadian Cantwell coal coal-bearing copper County Creek Cretaceous December deposits Dept Devonian district drainage dredges east Econ edge water Elk Hills fault February feet figs flgs fossils Geological Survey Geology glacial glaciers gravel incl Inst January Jour July June Kantishna Kentucky Geol Lake limestone Lituya Bay March 31 McKinley miles Mineralogist mining Mount McKinley Mountains mudstone Nenana Nenana River November October Ohio Acad oil sand Oklahoma Ontario Paleontology Paleozoic Pan-Am Petroleum Geologists placer mining places Pleistocene Proc production prospecting records region Rept River rocks Scales schist Science second-feet sediments September shale stratigraphic stream Structure of typical Tertiary Texas thickness Trans tributary Tulare formation typical American oil U. S. Geol Univ upper Valley Washington Acad Yukon