14 THE ROYAL SOCIETY OF CANADA 



SELWYN's table of BRITISH COLUMBIA STRATA 



I. Superficial. 



II. Volcanic Series and Coal and Lignite Group of Mainland; 



Coal Rocks of Vancouver Island. 



III. Jackass Mountain Conglomerate Group. 



IV. Upper Cache Creek Group (Marble Canyon Limestone). 



V. Lower Cache Creek Group. 



\'I. Anderson River and Boston Bar Group and Upper Rocks 

 of Leather Pass and Moose Lake. 



VII. Cascade Mountain and Vancouver Island Crystalline 



Series. 



VIII. Granite, Gneiss, and Mica Schist. 



Having extended his observations farther to the north, Selwyn 

 in his report for 1875-76 adopts the same basis of classification but 

 brings the formations into the accepted time scale as below: — ■ 



SELWYN's TABLE OF NORTHERN BRITISH COLUMBIA STRATA 



I. Cainozoic — -Superficial and Lignite Tertiary including the 



Upper Volcanic Series. 



II. Mesozoic — Cretaceous Coal-bearing Rocks. 



III. (?) — Sandstone, shales, and conglomerates of Foothills. 



IV. Palaeozoic- — ^Upper and Lower Cascade Groups. 

 \'. Granite and Mica Schist. 



About the same time Dr. G. M. Dawson conducted his first 

 expedition into British Columbia: he employed Selwyn's nomenclature 

 but established the Carboniferous age of the Cache Creek Group. In 

 a later report (1877-78) he brought the crystalline series of Vancouver 

 island into the Cretaceous and proved by fossils a similar age for the 

 Jackass Mountain series. 



The following year we find a voluminous report by Dav/son on 

 the Queen Charlotte Islands: the stratigraphie column is divided into 

 Post-Pliocene, Tertiary (probably Miocene), Cretaceous, Triassic. 



The next important development is the correlation of the Cre- 

 taceous rocks of the mountains with those of the foothills and plains, 

 which appeared in his report for 1885 as follows: — 



