NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 237 



as has been done in the case of the Knox Hmestone of the Appala- 

 chian Trough and McConnell's Castle Mountain limestones of the 

 Bow Trough. It would be going back to the practice of the period 

 from i860 to 1890 to incorporate in one formation faunas of Cam- 

 brian, Canadian, and Ozarkian time, as has been done recently by 

 Walker when he included in his section, as the Goodsir formation, 

 the pre-Silurian limestones of the Stanford Range of the Windermere 

 map area above the massive Upper Cambrian Lyell limestones. He 

 absorbs in the Goodsir formation, the Ozarkian Mons formation with 

 its several subfaunas, the Canadian Sarbach formation with its very 

 typical fauna, and the Upper Cambrian Sabine formation and its 

 fauna. This is done in spite of his objection to my correlating the 

 Lyell limestone of the Glacier Lake and Sawback Troughs with a 

 similar limestone in the same stratigraphic place in the Eeaverfoot 

 Trough. He says : " Walcott has used the name Lyell ? in describing 

 this formation in the Stanford Range. The correlation with the Lyell 

 is made over a gap of lOO to 132 miles (160.9 to 212.3 k'li-) ^^^ 

 across the summit of the Rocky Mountains." 



Walker does not appear to realize that the type locality of the 

 Mons formation and its faunules is the same as that of the Lyell 

 formation, and that all of the faunas he has incorporated in the Good- 

 sir are typical of the Mons both in the Glacier Lake section and 100 

 miles (160.9 km.) or more distant in the Stanford Range of the 

 Beaverfoot Trough. 



The question arises as to where, if at all, the Goodsir formation 

 occurs in the Beaverfoot-Rrisco-Stanford Range. It may possibly 

 be present on its eastern slope, east of the great Kootenay fault, 

 but the limestones occurring there may belong to the upper Ottertail 

 formation. If of Goodsir age. it is evident that the formation thinned 

 out rapidly to the west and south and was not deposited in the Beaver- 

 foot Trough or over the area now occupied by the central and west- 

 ern portions of the Beaverfoot-Brisco-Stanford Range. It is not 

 present in the Sinclair Canyon, Stoddart Creek, or Sabine Mountain 

 sections, and has not been identified west of the Kootenay fault. 



Ottertail Formation. Allan, 1914 



Type locality. — In the high escarpments of the northeast side of 

 Ottertail Range from Mount Hurd southward. 

 Derivation of name. — From Ottertail Range. 

 Character. — Allan describes the formation as follows : * 



* Geol. Surv. Canada, Mem. No. 55, 1914, p. 91. 



