40 



THE ROYAL SOCIETY OF CANADA 



SHIMER S TABLE OF PALAEOZOIC STRATA OF THE ROCKIES 



In Guide Book No. 8 of the International Geological Congress, 

 J. A. Allan gives an extended table of the generalized Palaeozoic 

 section : it corresponds with the above with the addition of a forma- 

 tion- — the Sawback' — provisionally ascribed to the Devonian below 

 the Intermediate limestone, the Silurian Halysites beds, and the 

 Ordovician divisions— Graptolite shales and Goodsir shales. The 

 Cambrian sequence given below indicates the great advances since 

 the time of G. M. Dawson: — • 



Allan's table of the Cambrian of the rockies 



The Palaeozoic section in the Mount Robson district is given by 

 Walcott as follows: — 



WALCOTT s classification of the CAMBRIAN 



