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ROOSVILLE FORMATION. 



The Phillips is overlain conformably by the Roosville, 

 which consists almost entirely of massive, laminated, 

 green, siliceous, metargillites weathering greenish-grey. 



DEVONIAN LIMESTONE. 



In the Rocky Mountain system, the Devonian lime- 

 stone apparently rests conformably upon the underlying 

 Cambrian (?) series, while in the Purcell range to the west, 

 an apparent uncomformity separates the Devonian lime- 

 stone from the Gateway formation. The staple rock 

 of the Devonian is a massive, dark grey, limestone weather- 

 ing a whitish-grey colour. The following fossils are 

 found in the limestone: — 



Atrypa reticularis. 



Spirifer pinionensis. 



Orthothetes chemungensis var. arctostriatus. 



WARDNER FORMATION. 



The dominant rock of the Wardner formation, which 

 lies conformably upon the Devonian, is a whitish-grey 

 crystalline limestone, occurring in beds from a fraction 

 of a foot to four feet (i-2 m.) in thickness. 



The following fossils are contained in the limestone : — 



Camarophoria explanata (McChesney) 



Camarotoechia cf. C. metallica (White) 



Composita madisonensis (Girty) 



Cleiothyrdina crassicardinalis (White) 



Spirifer cf. S. centronatus (Winchell) 



Productella cooperensis (Swallow) 



The above fossils point to a Mississippian age, Lower 

 Carboniferous, for the Wardner limestone. 



KOOTENAY GRANITE. 



The Kootenay granite, occurring as small stock-like 

 masses, cuts all the members of the Purcell series in East 

 Kootenay. The peculiar alignment of these bodies of 

 granite along the lines of major faulting of the region 

 cannot be accidental. It shows that the intrusion of the 



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