34 THE ROYAL SOCIETY OF CANADA 



Several important contributions were made by Wm. Mclnnes 

 notably on the Pasquia hills and on the Saskatchewan River district, 

 and Professor Alex. MacLean contributed several papers dealing 

 with the detailed stratigraphy of southern Manitoba and Saskatchewan. 

 Investigations were carried into the far north by F. H. McLearn, 

 E. M. Kindle, and T. O. Bosworth. 



An interesting table indicative of the type of work being done 

 in these northern regions is that given by McLearn in the Summary 

 Report of the Geological Survey for 1920. 



mclearn's table of northern strata 



Mesozoic 



Cretaceous 



Bullhead Mountain formation 

 Upper member 

 Lower member 

 Triassic 

 (Upper) 



Schooler Creek formation 

 Zone of Pseiidomonotis 

 Zone of Halohia 

 Zone of Spiriferina-Terehratida 



No account of the great plains is complete without mention of 

 Dowling's paper read before this society in 1915, entitled "The Cre- 

 taceous Sea in Alberta." Valuable in itself for the actual informa- 

 tion conveyed it is still more significant as portraying the modern 

 method of treating geological problems, i.e., the consideration of 

 strata as the record of sea movements rather than as mere structural 

 elements. 



The Cordillera 



We have seen that in 1900 a substantial skeleton, but only a 

 skeleton, had been established for the maze of formations of British 

 Columbia. Since that time the workers have been many and the 

 progress remarkable. Disregarding the extraordinary amount of 

 publication due to the investigation of mining areas, it may perhaps 

 be said that in stratigraphie advance alone British Columbia holds 

 the first place for the past twenty years. 



The numerous reports on coal fields alone contain a mass of 

 stratigraphie detail, and, unfortunately, a multiplicity of local forma- 

 tional names. By way of example may be mentioned the following: — • 



