200 Canadian Record of Science. 



with these Huronian sediments are numerous intrusions of galbro 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 Huronian 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 equiv- 

 alent 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 litho- 

 graphically and stratigraphically the rocks bear a striking resemblance 

 to rocks mapped as Huronian in the region to the north and north-east 

 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 geographically, and the greatest care will have 

 to be exercised in attempting such a correlation. " i Even if the corre- 

 lation had been established no fundamental departure would have been 

 made. What had frequently been conjectured by Canadian geologists 

 would have been proved. 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 Palfeozoic succession. 

 Ells certainly did not advocate this course. 



The Palaeozoic outliers in this area and especially that of Niagara age 

 are of exceptional interest. Geographically this outlying patch of 

 Niagara is so widely separated from any other locality where rocks of 

 this age are now known to exist, that it has been a question as to 

 whether it was formerly connected with the occurrences about Hudson 

 Bay or with those about Lake Ontario. The strata are highly fossil- 

 iferous, and the palaeontological evidence presented seems to prove that 

 tlie seas in which the Niagara sediments of the Winnipeg basin and of 

 Hudson Bay were deposited were practically continuous, while both 

 were separated from the Temiscaming basin and tlie region to the 

 south-west. 



The Pleistocene history of the region seems to consist of a period of 

 glaciation by a great ice sheet, followed by a profound submergence, 

 during which time the ocean invaded a large portion of the Ottawa 



1 American Journal of Science, Vol. III., Marcli, 1807, p. 177. 



