HONEYMAN ON THE LONDONDEKRY IRON ^[INES. 115 



the Cobequid bay, one and a half miles. The north of the 

 section represents the rocks from the centre to the bridge 

 above the mines, a distance of one and a half miles. The 

 extreme rock is sjenitic, and is situate about three miles 

 west of what is called the sugar loaf, which is considered to be 

 the highest mountain of the range. In this part of the section 

 we have altered strata, which bear a striking resemblance to the 

 altered silurian near Arisaig pier, county of Antigonish. These 

 are quartzite ore, with slaty cleavage, breaking readily into 

 rhomboidal forms. These are sometimes divided by true 

 granite. I was astonished at findins: g'ranite associated with 

 these rocks, as I have not met with it elsewhere similarly 

 associated. On referring to the Acadian Geology, I find that 

 granite occm's elsewhere in the Cobequids, and in the same 

 geological position. I was equally surprised about five years 

 ago in finding granite in the Baddeck mountains. Cape Breton, 

 where I had expected to find syenite, as in the Antigonish and 

 Cobequid mountains. Still I believe the two cases are not 

 analogous, and that the geological relations are different. I 

 consider the Baddeck o-ranite as identical with that of our lower 

 silurian of Guysboro' county, &c., and I regard the auriferous 

 slates of Wagamatcook, associated with the granite, as also of 

 lower silurian age. The granite of our section has also con- 

 nected with it as intrusive rocks, several dykes of dark 

 pyritous trap, which have forced themselves up between the 

 siliceous silurian strata, converting them, as at Arisaig, into por- 

 celaneous jasper, obscuring the stratification. This trap 

 appears in one case crowned with these strata, having failed to 

 force its way to the surface. 



I have assigned to these strata a silurian age, in consequence 

 of their resemblance to the strata of Arisaig, of which the 

 Frenchman's barn is a part. They also bear the same relation 

 to the argillite here, as the supposed equivalent do to the 

 aro;illite of the Antigonish, Ohio, and Me rigomish mountains. I 

 consider that it is not at all likely that we shall have any 

 evidence more satisfactory than this to determine the geological 

 age of the strata in question, at least in this locality, as the 

 proximity of the trap must have destroyed organic remains as 



