47 
This other section of this coal field on the South side of 
the Lancashire and Yorkshire Eailway is taken in the line 
of the longitudinal fracture of the coal deposit dipping 
under the Magnesian Limestone. This section is twenty- ' 
seven miles in length. It commences at Halifax with Beacon 
Hill, due W. and E. to Chevet Hall, then by Ackworth 
Moor top to Baghill and Brotherton. In the line of this 
section the Lower Permian Red Sandstone and Magnesian 
Limestone formations slope against the coal beds of the car- 
boniferous rocks, occupying a position geologically more con- 
formable than in Mr. Childe's section ; that is, side by side 
with each other. 
I have now come to the chief point to which I would draw 
your attention — the probable existence of coal under the 
Magnesian Limestone formation; Mr. TToodhouse, no mean 
authority, observing of this part of the coal field on the E. 
and S. of this line of longitudinal fracture, that it was within 
the last few years supposed that it terminated wherever it 
was overlapped by the Magnesian Limestone or New Red 
Sandstone formations, and that it was chimerical to expect 
to find coal near Worksop or Conisbro'. But near Worksop 
the Barnsley or Warren House bed of coal, the third market- 
able seam in our West-Riding series, is now being worked 
at a depth of 610 yards below- the surface of the ground, and 
450 yards below the lowest bed of limestone. 
At the Denaby Main colliery, the deepest pit in Yorkshire, 
as well as the most easternly, southwards, the Barnsley bed 
of coal is worked at a depth of 449 J yards from the surface. 
The dip of the strata is to the E. or perhaps JST.E., and 
thickness of bed 7 ft. 8 in, to 8 ft. 9 in. If at this colliery, 
seventeen miles S. S. E. from Brotherton, coal can be pro- 
fitably worked at a distance of half-a-mile from the Lower 
Magnesian Limestone, and only one and a half miles from 
Conisbro' Castle, may not coal eventually be found under the 
