within a Narrow Area. 



167 



its preglacial course has apparently also turned Spur 

 Creek (0, fig. 2) aside toward the east. The preglacial 

 course of Spur Creek seems to have been almost directly 

 south, following the present general trend of its upper 

 valley, i. e., that portion whose bottom is above the 1480 



Fig. 7. 



Fig. 7. Eestoration of probable preglacial topography and drainage. 



Dotted lines show the relation of the present courses of East and West 

 Sixmile to the rock slopes. Present rock gorges are shown by lines with 

 cross shading (near center). 



foot level. The lower end of Spur Hill (P, fig. 2) from 

 an altitude of 1560 feet down between West Sixmile and 

 Spur Creeks consists of drift material covering the rock 

 to a depth of at least 60 feet at the point where East and 

 West Sixmile unite. This is shown to be true by the 



