PART I 

 INTRODUCTION 



When examining- Dr. R. G. McConnell's stratigraphic section of 

 the Bow Valley, Alberta, and westward into the Kicking Horse 

 Canyon to Field, British Columbia, in 1907, I fomid so much of 

 interest and promise in the Middle and Lower Cambrian ' and the 

 pre-Cambrian ^ of the Bow Valley that I gave little attention to the 

 study of the Upper Cambrian of the Mount Bosworth section,^ and 

 did nothing with the Upper Cambrian of Mount Dennis and west, 

 which was subsequently so admirably worked out by Allan in 1910- 

 iQii/ During the field season of 1918 I examined the Upper Cam- 

 brian formations of Wolverine Pass and vicinity south of Mount 

 Dennis, and 21 miles (33.8 km.) south of the Mount Bosworth 

 section, and in 1919 measured a very complete section of the Ozarkian 

 and Upper Cambrian at Glacier Lake," 40 miles (64.4 km.) north, 

 30° W. of Allan's Mount Dennis section. This section was found 

 to dififer materially from the Mount Dennis-Ottertail-Goodsir section 

 of Allan and could be compared only in part with the Upper Cambrian 

 formations of the Mount Bosworth section. In the season of 1920 a 

 partial section was examined on the SifBeur River south of the 

 Saskatchewan River, which includes the Lyell, Sullivan, and Arctomys 

 formations of the Upper Cambrian of the Glacier Lake section, also 

 the Middle Cambrian Murchison and Cathedral formations. This 

 s'ection indicated that the Murchison formation of the Glacier Lake 

 section should be referred to the Middle Cambrian and correlated 

 with the Stephen formation of the Mount Bosworth section, which is 

 about 37 miles (59.5 km.) to the south. 



The next section studied was that near the head of the Clearwater 

 River, which is 20 miles (32.1 km.) south, 19° east of the Sififleur 

 section. The Clearwater section includes the formations of the upper 



' Smithsonian Misc. Coll., Vol. 53, No. 5, 1908, pp. 208-216. 

 " Idem, No. 7, pp. 423-431- 

 ^ Idem, No. 5, pp. 204-208. 



* Geol. Surv. Canada, Report for 1911 (1912), pp. 178-181. Also Mem. No. 55, 

 1914, pp. 60-102. 

 ° Smithsonian Misc. Coll., Vol. 72, No. i, 1920, p. 15. 



185 



