REPORT OF TEE CHIEF ASTRONOMER 



553 



SESSIONAL PAPER No. 25a 



Huntingdon forma- 

 tion. 



CD 



°C 



CD 

 CO 



1 





Sumas granite (stock?) 



Sumas diorite (stock ?) 



Custer granite-gneiss 



(pre-Cambrian ?) 



.. 



Pasayten sedi- 

 ments (members 

 B to £). 



Pasay ten Volcanic 

 formation (mem- 

 ber A of series). 





.2 



i'o 

 n 



"® JO 

 S CD 



.2 



Sh 

 CD ^. 



M 



Pasayten series, 



sediments. 

 Pasayten Volcanic 



formation. 





Remniel gi'anodio- 

 rite batholith. 



Osoyoos granodio- 

 rite batholith. 





*. 



Granodiorite 

 stocks of 'Bound- 

 ary Creek dis- 

 trict.' 



Smelter granite 

 stock. 



Cascade gneissic 

 batholith. 



Rock Creek gran- 

 odiorite. 



Osoyoos granodio- 

 rite batholith. 



Rock Creek gab- 

 bro and diorite. 



Dunite ( serpen- 

 tine) of ' Bound- 

 ary Creek dis- 

 trict.' 



Phoenix Vol- 

 canic group. 



.. 



Sheppai'd granite 

 stocks and dikes. 



Some aplites and 

 lamprophyres ? 



Conglomerates, Sop- 

 hie Mountain, etc.? 



•S-* 



Aplites and lampro- 

 phyres. (Eocene??) 



Trail granodioiite. 

 (Eocene ??) 



Granite stock east 

 of Cascade. 



Latites of Rossland 

 group. 



Rossland monzonite 



Shonkinitic rocks ; 

 hornblend ite at 

 Columbia river. 



Dunites ; harzbur- 

 gite. 



Baker gabbro and 

 peridotite. 



Fife gabbro. 



Much andesite and 

 basalt mapped as 

 Rossland group, 

 with sedimentary 

 inter-beds. 



Fossiliferous beds at 

 Little Sheepcreek? 



.. 



Sheppard granite 

 stocks and dikes. 



Some aplites and 

 lamprophyres ? 



Beaver Mountain 

 Group (Mesozoic ? ) 



- 



Aplites and lampro- 

 phyres. (Eocene??) 



Trail granodiorite 

 batholith. (h.oce- 

 ne??) 



Rykert granite 

 batholith. 



Monzonite dikes cut- 

 ting Pend D'O- 

 reille group. 



Younger lavas and 

 pyroclastics map- 

 ped as Rossland 

 group. 



Gabbro and basalt 

 dikes cutting Pend 

 D'Oreille group. 



~ 



*> 



s 



3 



o 



B 



(Mesozoic.) 



OQ 



•3 



