94 



GEORGE MERCER DAWSON ON THE 



in which it has been made to fit to the rock-surfaces. Where a 

 sudden drop of a few feet occurs to the south, a detached tongue of 

 ice has moved obliquely beneath the general sheet on the lower side 



Fig. 2. — Sections transverse to Direction of Glaciation of Boclcs 

 undercut and fluted. (Scale 5 feet to 1 inch.) 



a. Coast-section between Victoria and Esquimalt. 



b. West of Ogden Point, Victoria. 



c. Esquirnalt, face of cliff, 40 feet above sea-level. 



[These and the following figures are facsimiles of the author's drawings.] 



of the step, for some distance, till again carried onwards by the main 

 flow. In one case, at Pinlayson Point, divergence from the chief 

 direction amounts to forty degrees. This point is on the west side 

 of a large bay, continued northward by low ground, which must 

 have formed the channel for a great mass of ice. The oblique grooves 

 are so well worn as to be quite semicircular in the outline of their 

 transverse sections. Here is also noticeable a very general tendency 

 to slight divergence of furrows at the northern ends of rock-masses, 

 and convergence round points to the south. In a few cases well- 

 worn furrows showing this convergence are seen to be crossed at a 

 small angle by comparatively light scratches, showing a " falling- 

 off " of a few degrees from the normal course, due to the motion of 

 the last portion of the retreating edge of the ice-mass, when, though 

 forward movement still continued, lateral pressure had almost ceased. 

 Selective erosion is a well-marked feature ; and quartz sand being 



