186 THE ROYAL SOCIETY OF CANADA 



this shear zone allowed for further northward movement and anti- 

 clinal ridges were completed but ended eastward at the line of break. 

 The downthrow side of this break at Norman forms a fairly 

 large basin and it was in this that the horizontal Tertiary beds were 

 deposited. As the age of these beds at present writing is maintained 

 to be Eocene and of the same age as the Paskapoo and Porcupine 

 Hill beds of Alberta and as they were really correlated with the beds of 

 Cypress Hills and Wood Mountain of Saskatchewan, the assumption 

 is made that the period of folding was near the close of the Cretaceous 

 and before the formation of the outer ranges of the Rocky Mountains. 



