250 W. D. WILCOX 



This mountain, therefore, must have been so deeply covered 

 by a glacial stream that a barrier one thousand feet high caused 

 no deflection of the current. 



Proof of higher points being overrun by the ice was observed 

 on Stony Squaw Mountain, which rises to a height of 6130 

 feet, or 1620 feet above the Bow Valley, and is a little to the 

 northwest of the point just referred to. The mountain has 

 contours rounded by ice action and the higher parts are free 

 from debris or soil except for a few quartzite erratics, of which one, 

 more than two feet in diameter, was found on the very summit. 

 This mountain also is of Devonian limestone formation and con- 

 sequently the bowlders have been transported hither by glacial 

 action. 



The mountains in the neighborhood of Banff show glacially 

 rounded contours much higher than the summits of the lesser 

 points just referred to. Grooves running parallel to the valley 

 direction may be observed on the limestone cliffs of the moun- 

 tains, from the valley bottom itself, especially in certain condi- 

 tions of the light. Some of them are between 7000 and 7500 

 feet above sea level, and indicate that the ice was between 

 2500 and 3000 feet thick in this region. Up to 7500 feet above 

 the Bow Valley at Banff, the evidence of general ice action is 

 quite certain, but higher than this all is more or less obscure. 

 A distinction must be made between the work done by local 

 glaciers of the mountains and the general currents filling the 

 valleys, but this is not usually difficult as local glaciers, unlike the 

 general currents, were affected directly by the mountain slopes. 



Evidence from other parts of the mountains is in accordance 

 with these conclusions. Thus near Lake Louise, forty miles 

 northwest of Banff, in the Bow Valley, striations of a general 

 ice current were found on the summit of a mountain 7350 feet 

 above sea level. Glacial contours are evident about 350 feet 

 higher, or 7700 feet above seaJevel. 



Continuing up the Bow Valley about ten miles, glaciated 

 contours reach an altitude of about 8000 feet. Fifteen miles 

 further up, where the river takes its source, near the Little Fork 



