SILURIAN TILLITE IN BRITISH COLUMBIA 



79 



Two miles up the canyon of Shuswap Creek the southward 

 continuation of the formation was examined and found to be prac- 

 tically identical with that seen at Sinclair Springs. The bowlders 

 are not so large on the average, but are equally angular and un- 

 rounded. In two places there are thin lenses of crumpled strata 

 included in the formation. Both of these were only a few inches 

 thick and did not extend more than 4 or 5 feet before being cut off 

 by bowlders. The formation here is 150 feet thick. To the west 

 there is crystalline limestone very similar to that found on the 



Fig. 2. — A typical section of the conglomerate, 

 size of the bowlders. 



The hammer illustrates the 



same side at Sinclair Springs. On the east there is a thin bed of 

 quartzite, followed by massive limestone. To the south, up Winder- 

 mere Creek in the vicinity of the Blue Lakes, there is conglomerate 

 in direct Hne with the red bowlder bed. Here the character of the 

 bowlders is quite different, as are also the distribution of the out- 

 crops and the type of weathering, but there is sufficient evidence 

 to show that the two conglomerates are parts of one formation. 



The formation in Windermere Creek valley is probably 400 or 

 500 feet thick and extends along the north side of the canyon for at 

 least three-quarters of a mile. It is in the form of an anticline 

 plunging to the south, and disappears in that direction. 



