I 



Mineral Productions of Shropshire. 307 



- We find then, in this pit, a vein of 7 feet thick, 1 foot 

 thicker than any mentioned in the other Shropshire coal- 

 works; and that in httle more than 102 yards, 7 yards and 

 3 inches of coal are met with. Having given these speci- 

 mens of the strata in the collieries on the east, south, and 

 north-west borders of the county, I shall conclude with 

 those in one of the deepest pits at Welbatch, the works 

 there being the most considerable of what may be called 

 the central collieries of this county. 



Clay 



Blue clod 



Brown rock 



Red measures _ _ _ 



Gray rock 



Red measures _ _ _ 



Red clod _ - _ 



Coal 



Blue clunch - - * 



Dark brown rock 



Gray rock - - - 



Light blue clod - - - 



Coal 



Blue clunch _ _ _ 



Gray rock _ _ _ 



Blue clod _ _ _ 



Coal 



We see, then, that in near 53 yards there is only 1 yard 

 9 inches of coal, and no vein thicker than 2 feet ; but pro- 

 bably there are veins of more substance, whenever it shall 

 be thought expedient to sink these pits deeper. 



This county is also well supplied with lime, and in ge- 

 neral the limestone is at no great distance from coal. It 

 differs in colour, and in the quantity of flour or powder that 

 it yields when slacked. The lime-v/orks at Lilleshal are 

 very considerable. There is plenty of limestone near the 

 Wrekin and Coalbrook Dale ; and it extends from Benthall 

 Edge, (on the opposite side the Severn to Coalbrook Dale,) 

 near to Wenlock, called there Wenlock Edge; and so, 

 south-west, pointing towards Ludlow, it forms a ridge of 

 rock, somewhat perpendicular on the north-west side. It 

 is worked in various parts, and yields a large quantity of 

 white powder, though these properties degenerate as it ex- 

 U 2 tends 



