PLATE 76. 



GEOLOGICAL AND NATURAL HISTORY 

 .SURVEY OF MINNESOTA. 



PARTRIDGE RIVER PLATE 



BY N.H.WINCHELL, 



Contour Lines an shown approximatefyforevery .50 feel above Ihesfa. 

 ftyure.f ui Lakes denote altitude (thai** the aea. 



Oabotian 



Amlioan 



Kxplarialioii 



tjt (iabbm 



^ Black slates 



I Tmoiivlf 



^^ Quartzyte 



Hill faeMlm 



HI dnmiln: 



i I ,\fn-ti .*i'/fr*/ 

 -* l}riilrf>fi<lx 

 *^= Wtyonrctact.f 

 /rtiils 

 fi/>\' loot oanloiir* 



contours 



