91 NINETEENTH REPORT. 



conclusion can be drawn. That conclusion is that a harrier has been 

 lifted up dividing tlie late Devonian and subsequent seas of Michigan 

 and the soutlnvestcrn waterfront counties of Ontario, from the seas of 

 the same period and periods which built up the greater remaining part 

 of the present Lake P^rie bed material, the western ])art of Pennsylvania, 

 soutliern New York, the western part of Virginia, the eastern third of 

 Kentucky, and nortliern Tennessee. 



The bearing of this upon tlie oil question is thus stated: Any possible 

 segregated overflow or other supply of oil there may have been east of 

 of this barrier and between it and the uplift across the Niagara penin- 

 sula, would naturally find its way down the incline of the basin which 

 lias for its center the Ohio-Virginia coal measures. 



The absence of oil in the Cayuga and Port Colborne fields of gas 

 supports this conclusion. 



It may possibly be that deep down under all the disturbed area of 

 tlie west end of Lake Erie and the associated counties in Ontario there 

 is a major anticline. In such ease there is not only one but a second 

 promising field awaiting the drill, of which, as in the case of the first, 

 merely the outer edge has been essayed. 



Chalk River, Ontario, February, 1917. 



