Possibilities of the Oil Resources of Canada 



41 



beds of the Devonian. In the Mesozoic formations, porous beds of the 

 Upper Q-etaceous are productive in Wyoming, Similar strata have been 

 prospected in the Canadian fields, but with little success. Oil has been 



Fig. 2 — Fracture Zones 



found in Canada in the Lower Cretaceous, the horizon being approxi- 

 mately between the coal-bearing Kootenay, and the western representa- 

 tive of the Dakota rocks. The Tertiary formations of the Pacific coast 

 that represent marine deposits have proved rich in oil in the California 

 fields. Very small patches of rocks of this age are found along the 

 Canadian coast, but these so far have not proved comraiercially valuable 



