RELATION OP WISCONSIN AND lOWAN DRIFT 



543 



sin drift is found resting- npon sand. Here the Wisconsin drift 

 is distnrtbed by small synclines projecting into the sand beneath 

 P, H, I, fig-ure 173', and shown also in fig^ure 174. 



The contact line between the sand and the Wisconsin drift is 

 well defined. The sand has a fresh appearance, shows little 

 weathering;, and is probably of Wisconsin ag'e. It seems prob- 

 able that the sand pocket is not an inclusion of sand in the 

 Kansan drift, but was, previous to the advance of the Wiscon- 

 sin ice, a gully cut into the Ka'isan drift. With the coming of 

 the Wisconsin ice, the outwash from the edge of the ice filled 



Fig. 174. View showing 

 sand below. 



the folded Wisconsin drift projecting into tlie 



the gully. In the filling of the gully, the structure now seen 

 in the sand was effected, while the distortion of the laminae has 

 resulted from the pressure of the overriding Wisconsin ice. 



Many other instances could be given, not only in Worth 

 county, but in Franklin and Hardin counties as well, where 

 Wisconsin drift is found superimposed upon what appears to 

 be unquestionably Kansan drift. From a careful study of the 

 two drifts in the previously mentioned counties, the following 

 conclusions would seem warranted : ( 1 ) if lowan drift is pres- 

 ent beneath Wisconsin drift, it is so thin that the vigorous Wis- 



