UNITED STATES GEOLOGICAL SUEVEIl 



J. W. POWELL DIRECTOR 



GEOLOGICAL HISTORY 



LAKE LAHONTAN 



V. ! ! 



'^^ 



A QUATERNARY LAKE OF NORTHWESTERN^€y^^\ 



C FEB V 1887 



ISRAEL COOK RUSSELL 



£4^1s^^S^.^ 



WASHINGTON 



GOVERNMKNT PRINTING OFFICE 



1 S 8 ij 



