234 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



Since the above was published in 1914, L. D. Burling collected 

 more and better specimens of fossils in the lower portion of the 

 formation that clearly prove that my reference of one of the species 

 of trilobite to Ceratopyge was incorrect and that the lower part 

 of the Goodsir shales should be correlated with the Upper Cam- 

 brian Orr formation of the House Range section, Utah/ My re- 

 study of the collection of Allan and that of Burling fully sustains the 

 Upper Cambrian age of the fauna and that the lower portion of the 

 Goodsir in its type section and area should undoubtedly be referred to 

 the Upper Cambrian. To what extent the 6,040 feet (1,840.9 m.) of 

 limestones of the section on Mount Goodsir should be included in 

 the Goodsir formation is undecided, as no fossils have been found in 

 the middle and upper parts of the section and no upper boundary of 

 the Goodsir is known either on Mount Goodsir or in any of the typical 

 areas of the formation in the Ottertail Range, 



Goodsir formation and the Beaverfoot Range. — In describing the 

 distribution of the Goodsir formation, Allan says : 



The formation forms the top of Mt. Mollison and its southward slope ; it 

 continues northwest on the slope overlooking the Beaverfoot valley until 

 it pinches out in a synclinal fold on the south slope of Chancellor Peak. /; 

 presumably floors the upper part of Beaverfoot valley and is developed on the 

 east slopes of the Beaverfoot range. The area of the formation exposed in 

 the Beaverfoot range is bounded on the southeast by a fault and towards the 

 north another fault defines the northeastern limit of the same area. 



Allan apparently did not follow up the eastern slopes of the 

 Beaverfoot-Brisco Range to near the top of the ridge, for if he had, 

 he would have found a profound fault with a northwest-southeast 

 trend and a southwest hade between the " Goodsir " limestones and 

 shales and the Silurian limestones, a fault that extends from the 

 Kicking Horse River south-southeast the entire length of the Beaver- 

 foot-Brisco-Stanford Range. This Kootenay fault marks the boundary 

 of the outcrops between the " Goodsir " of Allan and the Silurian, 

 Ordovician, and Ozarkian formations of the Beaverfoot-Brisco-Stan- 

 ford Range. On the northeast slope of the Beaverfoot Range, oppo- 

 site Glenogle, the Kootenay fault brings the limestones of the Goodsir 

 and the Mons in close proximity and it was perfectly natural for 

 Allan to assume the identity of the two limestone formations, and 

 to so map and represent them in his sections and text. At that time 

 there were no fossils known from the limestones west of the Kootenay 

 fault and none from the limestones of the adjacent Beaverfoot Valley. 



* Summary Rep. Geol. Surv. Canada for 1915 (1916), pp. 98, 99- Geol. Mag. 

 London, Vol. 59, No. 700, 1922, p. 458. 



