Excursion CI, 



Legend 



I Ordovician and Upper Cambrian 



[ \Z I Ross formation 

 J R J (chiefly Be/tian) 



I -j NaJdmu limestone 



v~ ~\ Nakimu limestone 



-j (mapped approximately) 



I q j Coupon formation 



B Approximate position 

 of Trench fault 



Geo/cg.c*/ Survey. Can 



Prairie Hills <a.nd Dogtooth MountaJns 



