PL. VI'K fl.'A 



GEOLOGICAL AND NATURAL HISTORY 

 SURVEY OF MINNESOTA. 



ROVE LAKE PLATE 



COMPILED BY U.S. GRANT. 



! 



Caboiian 

 Ani 



nimikie | 



Explanation 



| /Mfyefy "red rock',' with porphyryt&s ,e 



| Gabbro 



\ Diabase sills 



state member 

 ffate rne/nber 



^^ Trails 



. Fifty root contours 

 ~~^- Hundred foot contours 



Contour Lines are shown 



approximately for every -50/eet above 

 (he sea. Figures in Lakes denote 



altitude irbuve the sea.; when 

 followed by X fhe figures were 



obtained by leveling 



TFVV RIO 



