NO. I FORMATIONS OF BEAVERFOOT-BRISCO-STANFORD RANGE 35 



Dr. E. jM. Kindle wrote me under date of May lo, 1924, " The 

 graptolites which Professor Merle F. Bancroft secured from the 

 Windermere Creek locality were reported upon by Dr. Rudolph 

 Ruedemann, who states that they indicate an horizon near the top 

 of the Deep Kill shale." 



This corresponds to the horizon of 2a of the section of the Sinclair 

 Formation on Wonah Ridge above Sinclair Canyon which is 12 

 miles (19.3 km.) north of Windermere Creek. 



Sarbach ? Formation : 



The Sarbach formation of the Saskatchewan-Glacier Lake section * 

 appears to be represented in the Sinclair Canyon section west of a 

 fault above and east of the fourth bridge by a thickness of 350 to 400 

 feet (106.6 to 121.9 m.) of thin-bedded, hard silicious limestone and 

 a few thin layers of gray limestone containing a small fauna similar 

 to that occurring at the base of the Sarbach in the Clearwater Canyon 

 section of Alberta. The fauna includes (locality i6z) : 



Receptaculites sp. 

 Protorthis ? iones Walcott 

 Obolus 2 sp. undt. 

 Asaphus ? sp. 



It is possible that the silicious limestone near the base of the Sin- 

 clair formation of the Wonah Ridge section may represent the Sar- 

 bach. There is too little now known, however, of it in Sinclair Canyon 

 to correlate it definitely but on the evidence of the contained fauna 

 it may be referred to tentatively as representing the lower Sarbach 

 of the Glacier Lake and Clearwater Canyon sections. 



The Ordovician as now known includes : Feet Meters 



Glenogle formation (estimate) 1,700 518.2 



Sinclair formation 1,655 504.4 



Sarbach ? formation 400 12 1.9 



3,755 1,144-5 



OZARKIAN 



MoNs Formation : ^ 



This formation has an average thickness of 1400 feet (426.7 m.) 

 in the Glacier Lake-Sawback Range area and contains four char- 

 acteristic faunules Ocarkispira leo, Hiingaia, Symphysurina, Bris- 

 coia. The occurrence of the Mons in Sinclair Canyon ^ was discovered 

 in 1922 but it was not until the middle of the field season of 1923 that 



^ Smithsonian Misc. Coll.. Vol. 72, No. i, 1920, p. 15. Idem, Vol. 67, No. 8, 

 1923, p. 459- 

 ^ Idem, Vol. 72, No. I, 1920, p. 15 ; Idem, Vol. 67, 1923, pp. 459, 470. 

 "^ Idem, Vol. 74, No. I, 1923, p. 17. 



