UNITED STATES GEOLOGICAL SURVEY 



J. W. POWELL, IIEECTOR 



GEOLOGY 



QUICKSILYEK DEPOSITS 



PACIFIC .SLOI^E 



AVITH ^N i^TL^S 



'A /3 



GEORGE F. BECKER 



/■A 



M^AQHINGTOX 



govern:ment printing office 

 1888 



