194 



DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



3. The Adams Lake volcanic series conformably overlies the thick lime- 

 stones of the ' Nisconlith ' series in the Shuswap lakes area and is likewise 

 of pre-Beltian age. 



4. The ' Shuswap series' of the Shuswap lakes region is not a distinct 

 gneissic group unconf ormably underlying the ' Nisconlith ' series, but repre- 

 sents a f acies of the ' Nisconlith ' series of the same region, where the latter has 

 been specially metamorphosed. This metamorphism is thermal and is largely 

 due to batholithic intrusion. The batholiths are pre-Beltian in age. 



5. In many essential respects the lithology of the Priest River terrane 

 corresponds with that of the ' Nisconlith '-Adams Lake group of the Shuswap 

 lakes. In a general way those two pre-Beltian groups may be tentatively 

 correlated. 



The correlations suggested by the new facts are summarized in Table X. 



Table X. — Correlation with Canadian Pacific Railway Section. 



Selkirk range, 49th 

 Parallel. 



Summit Series: 



Lone Star 

 Beehive . . 



Ripple 



Dewdney 



Wolf, upper part . 



Wolf, lower part 



Monk 



Irene Volcanics .... 

 Irene Conglomerate. 



Western part ! 

 of Columbia j 

 range ; Interior) 

 Plateaus. 



Selkirk range at 



main line of 



Can. Pac. Ry. 



1 Selkirk Series, upper Castle Mountain 

 J part. Series, lower part. 



Rocky Mountain 



range ; Bow River 



section. 



Selkirk Series, middle ^Bow River Jieries, 

 part. | upper part. 



Unconformity 



Priest River Terrane 



Selkirk Series, lower Bow River Series, 



part ("Nisconlith" 

 of Dawson). 



Unconformity . .Unconformity 



Adams Lake 

 Series ; Niscon- 

 lith Series (of 

 Dawson);Sft«s- 

 ivap Series (of 

 Dawson). 



Granite batholith 

 cutting schists of 

 Dawson's "Niscon- 

 lith of Shuswap 

 Lakes area". 



lower part. 



Age. 



Middle Cam- 

 brian. 



Lower Cam- 

 brian. 



A.ge of Belt ter- 

 rane as defined 

 in present re- 

 port. 



Pre-Beltian. 



