MICHIGAN KENTUCKY 



U S GEOLOG CAL SURVEY 



I 8~ 



INDIANA 



^g I- pie Sa?-di kr 



I Mano r , , 



J , 1 *o n ^ — ^* 



1 I I J- 



39 



1 J in 



^ 





nB 



k 



r.e.. 



' -r 



"1 \^ ION 







