HONEYMAN NOVA SCOTIAN GEOLOGY. Ill 



ceeding periods. On the line of railway a continuation of the line 

 section, we have — feet of middle silurian. In another paper 

 I have regarded this as the lower part of a middle and upper 

 silurian band, having the upper part denuded and obscured by the 

 preceding lower carboniferous conglomerates. This band extends 

 east and west of the line of section, possibly as far west as Cape 

 Chiegnecto, and to the east as far as the Pictou County line. 



This band is chiefly remarkable for the iron deposits of Lon- 

 donderry. 



The line then passes through a band of Cuwbiiair (?) Lauren- 

 tian (-$) strata, a distance of — miles. 



This band also extends west of the line beyond (?) as far as Five 

 Islands ; and east ? 



The rocks of this band are gneisses, diorites, quartzites and 

 crystalline limestones, e. g., marble of Five Islands. 



Along the line is a width of — miles granitoid rocks. The 

 band extends to the west of the line as far as Cape Chiegnecto, and 

 to the east. 



The rocks of this band are syenites, granites, diorites and 

 porphyries. The line then passes through a Huronian and lower 

 and middle silurian series, whose extent east and west of the line 

 is obscured by denudation, and the over-lapping of lower carbon- 

 iferous conglomerate, &c. On the line of railway the rocks are 

 1. Diorites, porphyries, jaspers, conglomerates. 2. Diorites, shales 

 (fossiliferous). 3. (Middle silurian) slates (fossiliferous), diorites^ 

 porphyries. The width of these on the line is — — 



The line then traverses the carboniferous formation a distance 

 of 22 miles to the Strait of Northumberland, which bounds Nova 

 Scotia on the north. This carboniferous band extends west of the 

 line into New Brunswick, and east as far as Arisaig, 20 miles from 

 Cape St. George, the eastern extremity of Nova Scotia. This 

 includes the coal fields of Nova Scotia — Pictou, Springhill, and 

 Jo£frms. 



The line then crosses Northumberland Strait, a distance of 26 

 miles, and reaches the S. side of Prince Edward Island. The for- 

 mation traversed through the Strait is in all probability the 



