U. S. GEOLOOICAL BURVEY 



LAHE Lfi.nONTiN PL. 



NORTH 



Stibmerg'ed. Terra^ce 

 Ancient "Water Levels 



SCALE OF MILtS 



"M'ushi'oom "Rock 







IF. Z). Johmon, Xopugrapker- 



I O. Kussell, Geologists 



ANAHO ISLAND. PYRAMID LAKE NEVADA. 



