EXTENSION OP WISCONSIN DRIFT 
231 
With a portion of the Wisconsin drift extending south from 
Valley Junction, did the deposit form an obstruction to drain- 
age that ponded the water west along what is now the vallej 
of the Raccoon river? Such a barrier, if it ever existed, was 
Fig. 5. — ^From evidence now obtainable it appears that the area of Wisconsin 
drift south of Valley Junction extends through sections 23, 26 and 35, and 
probably into 36 on the east and 34 on the west (township 78 north, 
range 25 west). (Topography taken from the Des Moines Sheet.) 
