310 



THE STRUCTURE AND SUCCESSION AT 



ft. 



point, 

 )er seam 



underclay 



coal 



shale and underclay. . 

 coal \ 



clay ,- Chapel point 

 coal j 



strata 



fireclay 



coal j "PP' 



strata . 



coal 



underclay and shale 



coal 



shale 



coal 



sandstone 



clay 



coal 



concealed measures, of Lloj'd's cove. 



1 



28 

 3 



50 



ni. 



3 



6 



2 

 2 



4 



25 

 1 



1 

 250 



In this section there are eight beds of limestone, with a 

 total thickness of ten feet, and nineteen coal seams with a total 

 thickness of fifteen feet. Every seam possesses its underclay 

 except one or two very thin layers ; and Stigmaria rootlets 

 abound. Hence it can scarcely be doubted that these seams for 

 the most part have accumulated from vegetation in place. The 

 term " strata," as used above, includes a few beds of underclay 

 with rootlets, but containing no accompanying seam, showing 

 that in some cases the vegetable matter was prevented from 

 accumulating. 



All the limestone layers are very similar in character, except 

 the eight-inch one between the Indian Cove and Main seams. 

 This is very compact and semi-crystalline, and of a brownish 

 gray color. The others are coarse and bluish gray, somewhat 

 crystalline and frequently brecciated. All rest upon shale. 



