SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 72 



September. \Miile on the trail 30 camps were made, but owing to 

 weather conditions and to the fact that the snow remained on the slopes 

 and cliffs above timber line, a relatively small amount of productive 

 work was acconi])lishe(l. 



The section studied near the head of Ranger Brook Canyon of the 

 Sawback Range about 12 miles (19.3 km.) northwest of Banff, was 

 from the base of the Devonian limestones down through the post- 

 Cambrian (Ozarkian) j\Ions formation and the subjacent Lvell and 

 Sullivan ' formations of the Upper Cambrian. 



Fig. 8. — Camp on the lower eastern slope of Fossil Mountain looking north 

 toward the head of Red Deer River. 



The character of the formations is indicated by figures 2 and 3, 

 which show the southwesterly slope of the highly inclined beds (45" 

 to 70°) and the saw-tooth-like effect caused by the unequal rate of 

 erosion of the massive bands of limestone and the softer, more friable 

 sandy and clay shales. Towards the northwest end of the Sawback 

 range at the Red Deer River the Black and White Douglass mountains 

 stand high al)ove the surrounding ridges. ( b'ig. 5. ) Oyster Mountain 



^ See Exploration pamphlet for tqio. Smithsonian Misc. Coll., \'o\. 72, 

 No. I, 1920, p. 15. 



