CARBONIFEROUS DISTRICT OF RICHMOND, ETC. 



391 



shows that it has been subsequently deepened by dihivial waves or 

 currents from the northward. 



be 







6q 





Head of Plaister Cove. 



M'Millan's Point. 



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"(2.) Between M'Millan's Point and Plaister Cove the shore is 

 occupied by black and gray shales and very hard sandstones in fre- 

 quent alternations. The sandstones have been much altered by heat, 

 and are traversed by veins of white carbonate of lime, sometimes 

 mixed with sulphate of barytcs. At the point immediately north of 

 Plaister Cove these beds dip at a high angle to the south-eastward. 



"(3.) Overlying these beds is a bed of limestone about thirty feet 

 in thickness ; it is of a dark colour, laminated and subcrystallinc ; its 

 lamin£e are in some parts corrugated and slightly attached to each 

 other, and in other places flat and firmly coherent ; it is traversed by 

 numerous strings of white calcareous spar, containing a little carbonate 

 of iron and small crystals of blue fluor-spar, a mineral rare in Nova 

 Scotia, and which [ have found only in the Lower Carboniferous 

 limestones. The limestone supports a few layers of greenish marl 



