458 Lancaster D. Burling — 



§ 15. Allan ^ speaks of the conformable relations of the Goodsir 

 to the overlying graptolite shales, and so far as the writer has been 

 able to determine in the field there is no evidence of unconformity 

 at either the upper or the lower boundaries of the Glenogle shale. 

 In fact, where the graptolite-carrying portion of the Glenogle shales 

 is exposed in observable relations to the overlying and underlying 

 rocks (see the Beaverfoot Range section between §§ 6 and 7) there 

 appears to be only one reason for making a separation between the 

 graptolite shales (19 : 50) and the loAver beds which carry the Glenogle 

 Creek fauna (15 : 108 and 19 : 53). This is the fact that the graptolite 

 shales are of Chazyan age and the Glenogle Creek fauna appears to be 

 Bretonian and therefore to be assigned to the Canadian. But Allan's 

 definition of the Goodsir (6,000 feet) as underlying the graptolite 

 shales hardly justifies us in referring to it the palaeontologically 

 identifiable series of Canadian beds which underlie the Chazyan 

 graptolite shales. We have, therefore, included bed No. 20 of the 

 section with beds Nos. 14 to 19, as forming part of the Glenogle 

 shales (see § 5). 



§ 16. Good sir Formation. 



The Goodsir formation was described ^ from the Ottertail Range, 

 a few miles to the north, but it is exposed in its typical manner in 

 the Beaverfoot Range. Here, as in the Ottertail Range, it carries 

 abundant fossils, and these range upward in age from the so-called 

 " Ceratojjyge fauna " of Walcott ^ at the base. As announced in 

 1916,^ these fossils are to be compared, not with Ceratopi/ge, but with 

 forms from the Orr formation of the Upper Cambrian in the House 

 Range of Utah. The line between the Cambrian and the Ozarkian 

 is, at least, tentatively drawn by Ulrich ^ at the top of the Orr 

 formation ; and the base of the Goodsir thus lies well down in the 

 Upper Cambrian, as that term was used by Walcott. 



The middle and upper portions of the Goodsir formation have 

 yielded a number of fossil horizons, which will fill in that portion 

 of the geological column between the Upper Cambrian and the 

 Canadian, but the writer was unable in the field to locate strati- 

 graphic evidence for the true position within the formation of the 

 Cambro-Ordovician boundarv. 



§ 17. Correlation Table. 



There is presented herewith a generalized table correlating the 

 succession in the Beaverfoot Range and in Mount Bosworth : — 



1 Mem. Geol. Sun. Canada, No. 55, 1914, p. 101. 



2 Allan, 8umm. Rep. Geol. Surv. Canada for 1912, 1913, p. 172. 



^ Smithsonian Misc. Coll., vol. Ivii, No. 7, 1912, pp. 233-4, pi. xxxv. 

 * BurHng, Summ. Rep. Geol. Surv. Canada for 1915, 1916, pp. 98-9. 

 ^ Bull. Soc. Geol. America, vol. xxii, 1911, p. 612. 



