250 The Ottawa Naturalist. [January 



gabbro and diabase, some of which pass over gradually into flesh- 

 red granites, representing, it is believed, portions of one and the 

 same magma. 



No attempt is made in this report to correlate the Grenville 

 Series and the Huroni in of the area, as the facts are insufficient to 

 warrant the attempt. And it may be remarked incidentally in this 

 connection that a statement made on page 415 of the current 

 volume of the Journal of Geology, in reviewing some other recent 

 papers on the Canadian pre-Cambrian, is scarcely correct. The 

 statement is as follows : 



"The succession and correlation proposed in the above papers 

 by Adams and Barlow and by Ells are fundamentally different from 

 the traditional one which has been held in Canada for many years. 

 The first departure is in placing the Grenville and Hastings Series 

 as equivalent to the Huronian." 



In the papers in question this correlation was not definitely 

 made, but it was stated in reference to the Hastings Series that 

 " Both lithologically and stratigraphically the rocks bear a striking 

 resemblance to the rocks mapped as Huronian in the region to 

 the north and northeast of Lake Huron, and it seems very likely 

 that the identity of the two series may eventually be established. 

 The two areas, however, are rather widely separated geopraphic- 

 ally and the greatest care will have to be exercised in attempting 

 such a correlation."* 



The further statement made by the Reviewer that " Ells 

 places with the Huronian all the sedimentary rocks of Eastern 

 Canada" is also manifestly inaccurate, seeing that while it might 

 terminate the controversy concerning the upward extension of the 

 Huronian to include in that system the whole Palaeozoic succession, 

 Ells certainly did not advocate this course. 



The Palaeozoic outliers in this area, and especially that of the 

 Niagara age, are of exceptional interest. Geographically this out 

 lying patch of Niagara is so widely separated from any other lo- 

 cality where rocks of this age are known to exist, that it has been 

 a question as to whether it was formerly connected with the oc- 

 currences about Hudson Bay or with those about Lake Ontario. 



* American Journal of Science, Vol. Ill, March, 1897, P- i77- 



