VOL. 75, NO. 5, PL. 81 



NEOUS COLLECTIONS 



N'ortheast side of Devon Mountain (y.855 feet. 3,003.8 m.), with Devon glacier and Amphitheater on the right. The npper Devonian Pipestone formation limestones (U. D.) form Devon Mountain and the spur extending northeast (left) to the south fork of the broad 

 upi>er canyon valley of the Clcarvi/ater River. The contact of the dark Middle Devonian (Messines) limestone (U) with the subjacent Mount Wilson quartzite (^K. Q.) of the Ghost River interval is well exposed below the outlet of the small glacial lake in the bottom 

 of the amphitheater, and also the thick-bedded light colored magnesian limestones (O) of the Sarbach formation that extend down to the foot of the dark lower cliflfs on the left of the photograph (see pi. 80). 



Locality. — At E on map, plate 26. .South side of head of Clearwater River Canyon, about ig to 20 miles (30.6 to 32.2 km.) north of Lake Louise Station, Alberta. 



