REPORT OF THE CHIEF ASTRONOMER xiii 



SESSIONAL PAPER No. 25a 



Page. 



Conglomerate formations 350 



Conglomerate at Lake mountain 350 



Conglomerate at Sophie mountain 350 



Conglomerate area at Monument 172 351 



Conglomerate area at Monument 169 352 



Correlation and origin 352 



Beaver Mountain group 352 



General description 352 



Sediments 353 



Volcanics 354 



Sheppard granite 354 



Porphyritic olivine syenite 356 



Coryell syenite batholith 358 



Dominant phase 359 



Basic phase at contact 360 



Apophyses 362 



Contact metamorphism , 362 



Syenite and granite porphyries satellitic to the Coryell batholith. . . . 362 



Chonolith 363 



Dikes 365 



Missourite dike 366 



Various other dikes 369 



Summary of structural relations in the Rossland mountains . 370 



Time relations 372 



Observed facts 372 



Probable relations 375 



Correlation 376 



CHAPTEE Xrv. 



Formations in the mountains between Christina lake and Midway (Middle 



part of Columbia mountain system) 377 



General description 377 



Grand Porks schists 378 



Cascade gneissic batholith 379 



General description 379 



Nature and origin of banding 380 



Smelter granite stock 381 



Attwood series . 382 



Chlorite and hornblende schists . 383 



Phoenix volcanic group 383 



Serpentine . 385 



Granodiorite 386 



Correlation 387 



8364— BB 



R — i 



