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       REFINE  
              Browse All : Geologic Cross-Section and Atlas Map and Mining and Geology by Chapman, R.H.
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    Author 
        Spurr, Josiah Edward 
      Full Title 
        Lenado Special Sheet. Geology Sheet XX . U. S. Geological Survey, Charles D. Walcott, Director. Monograph XXXI. A.H. Thompson, Geographer. F.M Douglas, Topographer in charge. Triangulation by E.M. Douglas. Topography by W.B. Gorse and R.H. Chapman. Surveyed in 1893. S.F. Emmons, Geologist in Charge. Geology by J.E. Spurr. Assistant, G.W. Tower. Julius Bien & Co. Lith. N.Y. (1898) 
      Publisher 
        United States Geological Survey 
      
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