REPORT OF THE CHIEF ASTRONOMER 



559 



SESSIONAL PAPER No. 25a 



Monte de Oro forma- 

 tion. 



Mariposa formation. 



Milton formation. 



Sailor Canyon forma- 

 tion. 



[These four forma- 

 tions mapped as 

 Juratrias.] 



Unconformity. 



(See above.) 



f 







Robinson form ation 

 and Calaveras form- 

 ation; argillite,lime- 

 stone, quartzite, 

 chert, mica schist, 

 greenstone inter- 

 beds. 



Potem formation ; 



shale, sandstone, 



etc. 

 Bagley andesite. 

 Mod in formation : 



sandstone,shale, 



etc. 



Unconformity. 



Brock shale. 



Hosselkuss lime- 

 stone. 



P i t formation ; 

 shale,,sandstone 

 and tuff. 



Bully Hill rhyolite 



Dekkas andesite. 



Si 



S 

 to 



(Pennsylvanian) : 

 Nosoni forma- 

 tion ; tuff, con- 

 glomerate, 

 shale, sand- 

 stone, lime- 

 stone lenses. 

 McCloud lime- 

 stone, with 

 chert nodules. 

 (Mississippian) : 

 Baird formation ; 

 tuff, sandstone, 

 shale. 

 Bragdon forma- 

 tion ; shale, 

 sandstone, etc. 



Unconformity. 



Mt. Stuart grano 



diorite, batholith. 



Quartz- diorite 



stocks, Mt. Stuart 

 area. 







Peshastin forma- 

 tion ; slate, chert, 

 grit, limestone 

 lenses. 



Hawkins formation; 

 breccia, tuff, amyg- 

 daloid (closely as- 

 sociated with the 

 Peshastin). 



Easton formation ; 

 mica-schist, horn- 

 blend e schi st, epid- 

 ote schist, am phib 

 olite (pre-Car- 

 boniferous '?) 



Granodiorite and 

 granite stocks 

 and batholiths ; 

 diorite stocks. 



Cultus formation ; 

 argillite and 

 subordi nate 

 sandstone. 



<a 



si 



Pend D'Oreille, 

 Attwood, Anar 

 chist,Hozomeen 

 and Chilliwack 

 series ; argillite, 

 phyllite,quartz- 

 i t e , limestone, 

 chert, with much 

 contemporan'e- 

 ou s greenstone 

 lava ; associated 

 basic and ultra- 

 basic intrusives. 



(These series in- 

 cluding also pre- 

 Carboniferous '!) 



Coast Range intrus- 

 ives (batholith); 

 grano diorites, 

 granites and dior- 

 ites. 



Vaneou ver series 

 and Nicola group ; 

 volcanic material, 

 with intercalated 

 limestones and ar- 

 gillites. 



s 



Cache Creek group ; 

 slates or schist, 

 cherty quartzites, 

 volcanic material 

 and interstratifide 

 limestone. 



Coast Range intru- 

 (sives probably Ju- 

 r as sic) ; diorites, 

 granodiorites and 

 granites. 





"4j 



1 



Ketchikan series 

 (probably in part 

 Triassic) ; phyllites 

 with some crystal- 

 line limestone and 

 much greenstone. 



.0 



'i 



e 



1 





Carbonifer - 



OUH. 



