REPORT OF TEE CEIEF ASTRONOMER 317 



SESSIONAL PAPER No. 25a 



Salmon River monzonite stock \ p . „ (Minot»ne ? ) 



Bayonne batholith and its satellitic stocks f^ost- Eocene (Miocene f). 



Sheppard granite stocks and dikes ^i 



Lamprophyres, minettes, kersantites, odinite and camptonite .... \ Posl . Laramie (Eocene?)- 



Aphtic dikes f l ' 



Trail granodiorite batholith ) 



Beaver Mountain group "\ 



Rossland volcanic group, with interbedded sediments (in part). .. \-Mesozoie (Cretaceous ?). 

 Monzonite, gabbro, and basaltic dikes cutting Pend d'OreillegroupJ 



Unconformity. 



Rykert granite batholith Late Jurassic? 



Pend d'Oreille group Carboniferous ? (and older ?). 



Abnormal hornblende granite sill cutting Kitchener quartzite at "| 



Corn creek. . . . > Middle Cambrian ? 



Metamorphosed gabbro sills and dikes cutting Priest River terrane J 



Kitchener formation Middle Cambrian ? 



Summit series Cambrian and l £eltian.' 



Unconformity. 

 Priest River Terrane Pre-Cambrian and pre-Bcltian. 



