PLATE Il 
PREGLACIAL 
VALLEYS 
WABASH & LOWER OHIO 
DRAINAGE BASINS 
PREGLACIAL VALLEYS sta 
EDGE of WISCONSIN DRIFT aaao 
EDGE of ILLINOIS DRIFT 
COMPILED By 
8 
ee 
F — pe ( 
HARRY M. CLEM. 
Roooag, 
