DISTRICT OF INVERNESS AND VICTORIA. 403 



Brought forward, 684 ft. 



Strong limestone ....... 5 



Mixed gray and brown shales ..... 12 



Concretionary limestone ...... 4 



Soft blue clay ........ 3 



Slaty limestone in layers, one to two inches thick . 47 



Soft blue marl, with gypsum near the bottom . . 32 



Gypsum ......... 8 



Soft green marl ........ 3 



Marl, with layers of limestone ..... 28 



Coarse limestone and shales ..... 44 



Crumbling porous limestone ..... 50 



Calcareous breccia, containing partially worn fragments of 



red syenite ........ 24 



Limestone showing no lines of bedding — Terebratula sac- 



culus, Productus corn, fragment of Avicula . . 60 



Compact slaty limestone ...... 6 



Soft brown shale ....... G 



Brown and purple marls ...... 40 



1056 ft. 



In this section the Lower Carboniferous rocks are of much less ag- 

 gregate thickness than usual ; yet they display the several dissimilar 

 members of the series pretty fully. The " millstone-grit " corresponds 

 with the deposit of the same name overlying the Carboniferous lime- 

 stone of England. It also corresponds with the thick succession of 

 sandstones between Plaister Cove and Ship Harbour, with those over- 

 lying the gypsiferous rocks in Pictou county, with the sandstones of 

 the Eagle's Nest, on the Shubenacadic, and with the lower groups of 

 Mr Logan's Joggins section. The limestone, marls, and gypsum are 

 well developed, except that the latter is of smaller thickness than is 

 usual. The lower conglomerate is wanting ; but this is always an 

 irregular deposit, and it appears in its proper place in most other sec- 

 tions in this part of Cape Breton, as, for instance, at St Ann's Harbour, 

 where the gypsum also is very largely developed. This section, as 

 described by Mr Brown, did good service in confirming the new and 

 more accurate views of the structure of the Carboniferous rocks in this 

 province promulgated by Sir C. Lyell in 1842. 



Useful Minerals of N. Inverness and Victoria. 



Gypsum and limestone are very abundant in this district. The 

 former may be obtained in any quantity at Mabou, Margarie River, 



