48 b 



GEOLOGICAL SURVEY OP CANADA. 



the colouring of the regions of the West Coast which have not been 

 visited is hypothetical only. 



TABULAR VIEW OF FORMATIONS REPRESENTED IN THE QUEEN 

 CHARLOTTE ISLANDS. 



Po6t-Pliocene. 



Sands and gravels. 



Plastic and boulder clays, gravel beds, &c. 



Unconformity, with evidence of some flexure and disturbance of Tertiary beds. 



Volcanic rocks of the north part of Graham Island. 



Sandstones, with marine fossils and lignites of Skun- 

 Tertiary, probably Miocene. -{ un Point. 



Shales, clays and lignites of Ma-min River and Chin- 

 [ oo-kun-dl Creek. 



Complete unconformity, with evidence of great disturbance. Chief period of 

 mountain making. 



A. Upper shales and sandstones. 



B. Coarse conglomerates. 

 Cretaceous. -( C. Lower shales and sandstones. 



D. Agglomerates. 

 ( E. Lower sandstones. 



Unconformity, but without evidence of great disturbance. 



Triassic, but possibly 



f .Agglomerates and ash rocks of Logan Inlet, &c. 

 (These possibly represent Subdivision D., supra.) 



Flaggy calcareous argillites and thin limestones. 



passing below into ^ Maggive limegtfmes 



Carboniferous. 



Massive dioritic and felspathic volcanic accumula- 

 tions, probably including minor limestone beds, ceca- 

 ls sionally schistose. 



