U.S. GEOLOGICAL SURVEY, 



MONOGRAPH XXV. PL. XXVII. 



:\LVP sHOW^mCr the greai-er pakt of the SHEYEisrOT: delta of t^aioc agassiz 



AND CONTIGUOUS BEACHES , NOR'ffl DAKOTA. 



ScaJe , 6 aiiiles to ai\ iiicli. 



LaJce Ai'ea 



Delta! 



Moraine 



AUitufl/'s of rcuZn'civ statiuvs are noted, in feet idtow I fie sect. 



