170 Hausman — Glacial Modification of Drainage 



changes abruptly and turns from the western side of its 

 valley sharply toward the eastern, exactly at the point 

 where the northern end of the Spur Creek Moraine 

 begins to be most characteristically developed, and where 

 the hummocks and kettles begin to appear (C, fig. 3). 



Fig. 10. 



Fig. 10. Stage of the glacial retreat when Rowe Hill marginal channel 

 carried glacial drainage from Gravel Creek valley to East Sixmile valley. 



The fact that lends the strongest support to this inter- 

 pretation, however, is that at the point where East Six- 

 mile is joined by Spur Creek, the former begins to cut 

 a gorge in the bed rock of the eastern wall of its broader, 

 older valley at the foot of Davies Hill. This gorge 



