160 Bailsman — Glacial Modification of Drainage 



Rowe and Hunter Hills (V, fig. 2) there extends a 

 roughly parallel series of what appear to be stadial 

 moraines. Chief among these is the largest of the single 

 moraines in this region, the Moss Creek Moraine (I, fig. 

 2 and 3), whose position and mass is responsible for the 

 diversion of West Sixmile Creek toward the east. Paral- 

 lel to this, and toward the north, lies the Spur Creek 

 Moraine (Z, figs. 2, 3) that has, in like manner, altered the 

 direction of flow of Spur Creek. Other stadial moraine 

 loops, representing halts of much shorter periods, are 

 readily traceable in the Gravel Creek "valley (R, fig. 2) 

 to the south. These moraines are shown in fig. 3. 



A rather well-defined glacial outflow channel, the Moss 

 Creek Channel (F, fig. 3), can be seen to the northwest 

 of Rowe Hill, now occupied by the southern tributary of 

 Moss Creek. A mile due south of this point a marginal 

 channel (S, fig. 3) exists, whose southward gradient sug- 

 gests that its function during the ice occupation was to 

 conduct the water from the Gravel Creek valley, between 

 the ice and Rowe Hill, into the Slaterville valley, that is, 

 after the retreat of the front of the ice lobe below the 

 level of the Moss Creek Outflow Channel. The Gravel 

 Creek Valley itself displays a very complex mass of 

 glacial deposits among whose irregularities of contour 

 the tiny stream is forced to take an extremely tortuous 

 course in its way down to the Slaterville Valley below. 



Perhaps the most clearly defined and striking evi- 

 dences of the presence of an ice lobe in the region of the 

 Upper Sixmile Valley are the marginal channels on the 

 western and southwestern slopes of Davies Hill (N, X, 

 and Y, fig. 3). Here in three principal groups is a series 

 of outlets plainly indicative of the presence of a tongue 

 of ice whose consecutive stages of gradual reduction in 

 thickness by melting, with halts of varying lengths, are 

 marked by the channels in the drift of Davies Hill. In 

 some places the channels have been eroded into the rock 

 wall of the hill. In the largest of these, first described 

 by Rich, a large singularly well preserved fossil fall 

 occurs. On the slopes of the main Sixmile Valley, 

 between Rowe and Davies Hills, lateral moraine ridges 

 are found, more numerous on the eastern than on the 

 western side. 



The evidence furnished by the glacial striae found 

 within and near the area and the presence of the trun- 



