U.S. GEOLOGICAL SURVEY. 



MONOGRAPH XXV. PL. XXVI M . 



M.VP OF TUK WKS'reRN SHOKES OF I-AKK ACiASSIZ, FROM THE VICINITY OF WHUATLANI), 



CASS ('OFN'n, NOHTH TO POinLANI) ANU MAY\'IU,K,nUH,I. C'OUNTY.NOKTH OAKOTA. 



SccUc, (> iiiiU'.s 1(1 .111 mcli 



Lake Area L _.! Delta [ ! 



AUUiuLr.s of r-tiUwii\- sUilioiis are noted in leet abow the sra . 



