324 GEOLOGICAL NOMENCLATURE 



massive, their transverse measure varying from ten to sometimes 

 nearly 100 feet. 



" From a point a short distance above the bridge, to one much 

 farther below, these conglomerates have a breadth of very nearly 

 a mile, giving a total thickness of about 1,600 feet. This great 

 mass of conglomerate composes Eraser's Mountain, towards the 

 south flank of which, presenting the outcrop escarpment of the 

 inferior part, the red and gray strata of the Millstone Grit dip 

 in such a way as, without other evidence, to induce the supposi- 

 tion that the one series overlies the other comformably. But on 

 the west side of the East River Mr. Hartley has evidence to 

 show that there is a want of conformity, at least in some places. 



" Three miles eastward of New Glasgow these conglomerates 

 have a breadth of about fifty-four chains, and they are here 

 immediately and conformably overlaid by the following ascend- 

 ing section : 



ft in. 



Gray limestone which has been quarried for burning ... .20 



Measures concealed 10 



Bluish-gray slightly calcareous sandstone 5 



Bluish-brown concretionary limestone, the surface of which 

 presents concentric botryoidal thinly laminated con- 

 cretions, with grayish and red clay in the interstices 



and inequalities 10 



Gray and red clay 8 



Reddish concretionary limestone, with concentric botryoidal 



laminae as before 1 



Whitish-gray limestone 1 



Gray and red mottled clay, resembling fireclay 1 4 



Glay flaggy sandstone 1 8 



Gray clay 6 



Whitish arenaceous limestone, holding abundance of Spir- 



orbis arietina 2 2 



Grayish-blue, spotted, slightly argillaceous sandstone .... 1 

 Measures concealed, including several feet of underclay . .24 

 Coal and black carbonaceous shale, including about eigh- 

 teen inches of good coal at the bottom, which used to 

 be mined by Mr. W. Fraser, for the purpose of burn- 

 ing the limestone in the lower part of the section .... 4 5 



69 



