U.S. GEOLOGICAL SURVEY 



MONOGRAPH XXV. PL. XXI 



MAI^ OK TllK OKACIAL LAKE SOUHIS. 



Scale, 20 iiiflos to an im'1\ . 

 1 



.■//tini,{^:t or Hail 



Deltas I ! MoTtiine.s 



ttiiUuns are noted in I'cet above l/ie .tt 



