U S GEOl.CC'ICAL SUKVLY 



GEOLOGY 01" JilJKEK^. DISTRK:T , PLATE i . 



GEOLOGICAL MAP OF RUBY HILL 



EUREKA MINING DISTRICT, NEV 



HACue,CBuli)^iBUin-C>ur^^ 



gUATERNARV SILCTIIAX 



Pogomp Hamburg ■ Ban.l,ur^ Si-cret Cn. Prospea m Pro.pecL M' Rhvolil^ 



^J3 r 



Pumice Rl.v 



touv.-nlion.il signs sl.iwmg Strike and apiJioxiinato angle of Dip 



..■--ihUcs where fossds WT*- obtained Ka„lt Liiips 



">'■'• tiiviJc Cvirwcs fifty ft . vertical iutei'val. 



