26o 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



The section that follows is located 2 miles (3.2 km.) east-northeast 

 of head of Lake Minnewanka on the north side of a broad canyon 

 called Devils Gap, which is about 51 miles (82.1 km.) west of 

 Calgary, Alberta, Canada. The Gap extends back from the east face 

 of the clififs 6 miles (9.6 km.) to Lake Minnewanka at right angles to 

 the strike of the westward dipping strata so as to expose the Carbon- 

 iferous, Devonian, and pre-Devoniaii formations in the lower portion 



>De 



Disconformity 

 Ghost River formation 

 Disconformity 



Middle and 

 r Upper Cambrian 



Lower Cambfian 



Fig. 24. Diagrammatic sketch of the section of the ridge that faces eastward 

 above the Ghost River. This is based on the measured section up to the 

 Devonian, illustrated in photograph reproduced on plate 27. 



Locality.— Same as plate 27. (At I on map, plate 26.) 



of the eastward facing cliffs. The Carboniferous and Devonian forma- 

 tions were studied by Dr. H. W. Shinier, who published the following 

 section.' Allan's figures are also given. 



Shimer Allan 



PERMIAN peet Meters Feet Meters 



Upper Banff shales and sandstones 1200 365.8 1400+ 426.7 + 



CARBONIFEROUS 

 Pennsylvanian 



Rocky Mountain quartzite 600 182.9 



Upper Banff limestone 2200 670.6 



MiSSISSIPPIAN 



Lower Banff shale 1300 396.2 



DEVONIAN 



Lower Banff limestone 1000 304-8. 



Intermediate limestone 1600 4877 



800 

 2300 



1500 + 

 1800 + 



243-8 

 701.0 



365.8 



457-2 + 

 548.6 + 



Shimer's section did not extend below the " Intermediate " lime- 

 stone, and it is probable that the thicknesses given for the formations 

 are based on estimates rather than accurate measurement. 



' Bull. Geol. Soc. Amer., Vol. 24, 1913, PP. 233, 234. 



