26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



abundant fauna (Richmond), and it is strongly defined by its light 

 gray color for a long distance in the southern clififs of the mountain. 



The contact between the Mons shales and superjacent light gray, 

 buff weathering silico-magnesian Silurian limestone is about 2 miles 

 (3.2 km.) N. 5° W. of Kootenay River bridge (Canal Flats) north 

 of a northeast and southwest fault that cuts across Sabine Mountain 

 from Columbia Lake to the Kootenay River Valley. 



The general relations of Sabine Mountain, and an outline of the 

 stratigraphic section are shown by plate 7, figure 2 and text figure 7, 



Fig. 4. — Diagrammatic profile section of southwest slope of Sabine Mountain 



above Canal Flats. 



SILURIAN 



Brisco Formation : i^ » at * 



Feet Meters 

 I. Thick-bedded, dark gray, coarse magnesian limestones. 



Estimate 1,800 548.6 



Fauna. — (See p. 11.) 



Beaverfoot Formation : ^ f at + „ 



reet .Meters 



I. Compact, light gray magnesian limestones in layers 6 inches 

 (15.2 cm.) to 3 feet (.9 m.) thick, with more or less 

 cherty and iilicious matter. Estimate 400 I2i.g 



At the base there is a band of highly siHciou> Hght gray 

 limestone about 100 feet (30.4 m.) thick that gives the 

 impression that it is a white quartzite when lighted up 

 by the afternoon sunlight. 



Fauna. — (See p. 13.) 



Disconformity: 



The Silurian limestones appear to be conformable with the dark, hard, argil- 

 laceous shales of the Mons formation beneath. The Wonah Quartzite, no feet, 

 (33.5 m.), Sinclair formation, 1,655 feet (504.4 m.), upper and middle portions 



