BULL. GEOL. SOC. AM. 



VOL.25, 1913, PL. 6 



Figure 1. — Typical View of the elevated plaix-like Surface of Keele Mountains 



These mountains are situated neai- the northei-n end of the belt. Here the plateau 

 surface is well preserved, due to the resistance of the composing limestones and dolomites 

 to su1<aerial destructive agencies. 



' S* 



PHOTO. BY D.D. CAIRNBS 



CANADIAN GEOLOGICAL. SURVEY 



Figure 2. — Close View of One of the rugged tallet Walls ix the Ogiltie Mountains 



These mountains are situated near the sonthem end of the belt. They do not appear to 

 have been planated. but probably originally constituted a residual mountainous area, at the 

 close of the last period of baseleveling. 



MOUNTAIN GROUPS COMPOSED ALMOST ENTIRELY OF PALEOZOIC LIMESTONES 



AND DOLOMITES 



