66 H0NEYMAN GEOLOGY OF ANTIGONISHE COUNTY. 



B i wanting, 



B' 



C y Upper series. 



B 



A 



Diorite (Trap), 



The resemblance between this section, until the Upper Arisaig 

 series is reached, and a great part of the Wentworth section of the 

 I. C. R. ( Transactions 1873-4) is sufficiently obvious. 



The sequence of the section shews that this series is between the 

 other two series, and that it is below the upper — Middle Silurian — 

 and that it is therefore Lower Silurian. 



The upper series is wholly u nc ry stall ine, being unmixed. 



Lithologically this seems to indicate that the whole Wentworth 

 section of the I. C. R. between the syenite and the carboniferous, 

 with an exception to be afterward noticed is Middle Arisaig — as it 

 is mixed crystalline and uncrystalline. 



Palaeontology may lead to a different conclusion in reference to 

 the last part of the Wentworth section of the pre-carboniferous 

 rocks. ( Vide Paper on the I. C. R.) 



It is only in this section that the carboniferous comes between 

 the middle and upper series — in sections 4, 6, and 8, it is absent. 

 Section 5 vies with the Wentworth section in having a representa- 

 tion of the Oldest Sea Beach. In Nova Scotia it surpasses it by 

 having it at the loftiest elevation. The conglomerate of the section 

 is about 980 feet above the present sea level, being only 30 feet 

 lower than the syenitic top of McNeil's Mountain, of Section 2nd, 

 1010 feet, which as far as known, is the second highest in Nova 

 Scotia Proper. If the conglomerate is volcanic ash, this may be 

 a sea bottom. 



* This band of Petrosilex seems to have supplied the aborigines of Prince Edward 

 Island with choice material for stone implements. ( Vide specimens of hatchets in the 

 Provincial Museum.) P. E. I. is on the opposite side of Northumberland Strait; the 

 eastern part of it being 20 miles distant from Arisaig. The geological formations of 

 the Island being Carboniferous, Permian (?) and Triassic, could not meet their wants, 

 and consequently they had to come to Arisaig. 



