PLATE 67. 



GEOLOGICAL AND NATURAL. HI STOHY" 

 SURVEV OF MINNESOTA 



CLAY COUNTY 



BY WARREN UPHAM 



Contour Lines off shown approximately 

 /fir each <50 -ffft tibcn-f the sectt 



Explanation. 



L 1 Alluvium . 



\li\ Beaches ofl^ake Ayassiz. 

 liill Modified DrifKJtelta ofLafteApassiz.) 



I I Till ,uundulatiny or rolKny 



I I Till, more praam aitty mlliny , mominic 



/V O R M A N 



H.XLVII w. 

 . 





