Camhro-Ordovician Section in the Beaverfoot Range. 453 



Section of Ordovician Strata in the Beaverfoot Range. 



§ 4. Beaverfoot Formation (Ordovician : Richmond). ft. 



1. Blue limestone alternating with 1 inch bands of black chert 150 



2. Blue-grey massive limestones . . . . . . + 500 



3. Massive grey-blue cherty limestone . . . . . + 25 



4. Massive dirty-grey-weathering blue limestone . . . 100 



5. Lighter-grey-weathering (than 4) grey-blue limestone . 20 



10 feet below top, Locality 15 : 109. 



20 „ „ „ 15:110. 



(i. Little more thin-bedded but same as 5 . . . . 25 



7 Little more massive and with many chert nodules, rounded 



and banana shajoed, etc. ...... 22 



Near base. Locality 15 : 111. 



8. Light-dirty-grey more or less thin-bedded limestone alter- 



nating with zones 2 to 12 feet thick of very thin-bedded 

 almost shaly limestone . ... 75 



25-40 feet below top. Locality 15 : 112. 

 50 „ „ „ 15 : 113. 



65 „ „ „ 15 : 114. 



9. Black shale 7 



10. White quartzite (not measured). 



11. Dirty brown to reddish-brown sandy shales in layers 



J to 1 inch in thickness, weathers reddish near base . 75 



12. These (11) pass imperceptibly into an arenaceous bandy 



weathering shale, poorly exjiosed but slope so marked 

 would ajjpear to accommodate about 700 feet of beds. 

 One-fourth mile to the south the lower haK of 12 is 

 sandv to reddish-weathering, the upper half a dark- 

 brown ±700 



13. Fairly massive, white, grey, and pinkish quartzite . . 150 



§ 5. Glenogle Shales (Ordovician : Chazyan at the top, Canadian 

 at the bottom). 



14. Shales, arenaceous, light-brown, cover slope from here 



to top of ridge. Room for about .... 500 

 Near base, Locality 15 : 107. 



15. Series of one-foot-thick blue limestone beds with several 



feet of black shale between ; the lower 10 feet com- 

 posed of a cherty black shaly limestone . . . 100 



16. Black shale, forming a prominent scarp in the slope due to 



being backed by the lower part of 15 . . .20 



17. Brown shale ........ 10 



18. Thin-bedded blue limestone (alternatmg blue and grey 



striped on cross surfaces) with bedding faces weathering 

 grey and each separated by |- to g^ inch slabs of grey 

 limestone . . . . . . . .35 



19. Blue-black shale with graptolite fragments ... 25 



20. More or less thin-bedded blue limestone . . . . + 100 

 About half-way up in this and just below a 3 to 5 foot bed 



of black shale found. Locality 15 : 108 (of Canadian 

 age), which is to be comi^ared with Glenogle Brook 

 fossils and with Locality 19 : 53. 



§ 6. GooDSiR Formation (L^'pper Cambrian at the base, passing 

 up into Ordovician). 



21. Pearl-grey to bluish micaceous shale series, forming 



centre of range. 

 Base of measured section. 

 A few hundred j^ards along the strike to the west the section 



has the following fossil horizons : — 



