NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 2I9 



Derivation. — From Glenogle Creek Station. 

 Character. — Allan describes the formation as follows : 



In Glenogle creek and in the small creek to the west, this formation was 

 found to be about 1,700 feet [518.2 m.] thick. The beds are steeply dipping 

 to the northeast, and form part of an overturned fold, so that they appear 

 to be overlain conformably by the uppermost beds of the Goodsir formation. 

 The Graptolite shales consist of black, carbonaceous, and brown, fissile shale 

 at the top, underlain by grey shales with another band of black shales near 

 the base. Underlying these shales are more massive, calcareous beds which 

 are lithologically similar to some of those in the Goodsir formation, and which 

 for this reason have been placed in the Goodsir formation.^ 



Some of the uppermost beds are highly fossiliferous. The best exposure of 

 this fossiliferous, black, thinly laminated shale is in a small creek a few 

 hundred meters west of Glenogle station. Some of the graptolites obtained were 

 almost a foot long.^ 



Thickness. — Estimated by Allan at 1,700 feet (518.2 m.).' In 

 Sinclair Canyon, I measured a series of shales and sandstones beneath 

 the Wonah quartzite that is 1,655 f^et (5044 m.) in thickness, and 

 Walker measured 2,152 feet (655.9 m.) of shales at the" head of 

 Windermere Canyon in w^hich the Glenogle graptolite fauna is finely 

 preserved.* 



Geographic distribution. — In the Kicking Horse Canyon below and 

 at Glenogle and up Glenogle Creek, northern end of Beaverfoot Range 

 and south along the range to Sinclair Canyon and Windermere 

 Canyon in the Brisco-Stanford Range. 



Fauna. — A large and varied series of graptolites of Ordovician 

 Canadian age collected by Walker were identified by Dr. Rudolf 

 Rupdemann, and a list of them is published by Walker in a table 

 showing the stratigraphic range of each species.^ This is a most 

 important contribution to the stratigraphy and paleontology of the 

 Beaverfoot Trough and aids greatly in establishing the independent 

 origin of its sediments and faunas. They have not been reported 

 as occurring in the Goodsir Trough. 



Observations. — I proposed to call the arenaceous shales and quartz- 

 itic sandstones beneath the Wonah quartzite in the Sinclair Canyon 

 section, the Sinclair formation," stating that the section " should in- 

 clude an extension of the Glenogle shale " and if so the name Sinclair 



* These calcareous beds have since been found to contain fossils of the 

 Ozarkian fauna. 



^ Geol. Surv. Canada, Mem. No. 55, 1914, p. 100. 



* Idem, p. 100. 



* Idem, pp. 26-31. 

 ° Idem, pp. 26, 27. 



' Idem, pp. 15, 34, 50. 



