90 



Till- LAURENTIAN. 



actions of the Nova Scotia Institute, and the Journal of the Geological 

 Society of London. I must, in like manner, decline to receive as of 

 Laurentian age the felsitie and other rocks of Cape Breton, referred 

 to this system by Mr Fletcher in the latest Report of the Geologica 1 

 Survey. I would except those of St Anne's Mountain, the litho- 

 logieal resemblance of which to the Lower Laurentian of Canada is 

 indisputable, and the evidence that they may be of this age has 

 certainly been much strengthened by the recent observations of Mr 

 Fletcher.* Specimens, and the observations of Mr Brown and Mr 

 Campbell and others, induce me also to believe that in the little island 

 of St Paul's, and in some parts of Northern Cape Breton, we may have 



Fig. 17.— Canal System of Eozoon — Magnified. 



a continuation of the rocks referred by Mr Murray to the Laurentian 

 in Newfoundland. With these exceptions, I have not seen in Nova 

 Scotia, unless in travelled boulders, any rock that I could believe to 

 be lithologically equivalent to the Laurentian of Canada, nor have 1 

 found any stratigraphical evidence of the occurrence of such rocks. 



14. COMPARISONS WITH OTHER COUNTRIES. 



The new facts above stated in relation to the older formations, 

 somewhat modify the statements made in Acadian Geology as to the 



* I observe, in some recent papers on this subject, the statement that I had held 

 these old rocks of Cape Breton to be intrusive syenites newer than the Carboniferous 

 age. On the contrary, I have held that the Metamorphic region of northern Cape 

 Breton formed "a rocky island in the seas of the Carboniferous period." The only 

 foundation known to me for this statement is my reference of tlie somewhat altered 

 limestones of Low Point, in Eastern Cape Breton, to the Lower Carboniferous. I 

 believe that later investigations would indicate that they are older. 



