MAP OF 



CENTRAL. WI S C 



HTDROGRAPHIC BASINS and the principal TOPOORAPHICAL SUBDIVISIONS 

 R. D. Irving, 18V (i. 



_ FRIENDSHIP f\ 



ADAMtS/ 



// LMARQ^T 



^^ _^_ Lit nit of Hyidrogmphic Basins 



tfortltern andEeuttrnLimits of 



DriftlfitArea 



, , ~,, ^ <&^m 



r< /- '' -iy 

 ^^ - V " \ .-' j . - *r 



The Oysfaliine rock District 

 The Sandstone District 

 Thf Limestone Dist rirt 



