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PAUL MacCLINTOCK 



c) There is well-developed cross-bedding at Blue River dipping 

 westward, while at Wauzeka, less well-developed but still recog- 

 nizable cross-bedding in sandy layers dips eastward (Fig. 3). 



d) While there are numerous bowlders in the drift of the mid- 

 course of the valley, there are more to be seen at Wauzeka and 

 Bridgeport. 



Fig. 3. — Westward dipping gravel on the high terrace two miles northeast of 

 Blue River. 



e) On the Bridgeport terrace the stones are not only more angu- 

 lar than elsewhere in the valley, but numerous subangular and 

 striated ones are found. In fact these glaciated stones are as 

 numerous on this terrace as in the till either in Iowa or at the 

 eastern end of the region. 



The suggestion from this evidence is that the drift in the mid- 

 course of the valley is fluvio-glacial and from the east, while that 

 at Bridgeport is glacial, and that at Wauzeka is fluvio-glacial and 

 both the latter are from the west. 



