307 
Ft. Ins. 
Coal 1 4 
Blue Shale ... ... ... ... 13 6 
Grey Sandstone ... ... ... ... 20 0 
Shale, with Ironstone ... ... ... 8 0 
Below this the pit passes through all the upper Coal- 
measures to the Barnsley Coal. From this section it is 
quite evident that the Bed Bock cannot be the Bothliegende, 
as was inferred by Prof. Sedgwick and others, but must be 
a member of the Coal-measures. 
(6) CONCLUSION. 
Having passed in review, though hastily and imperfectly, 
the varied facts relating to the subject of this paper, it 
appears that in all the rocks to the west, and on which the 
Limestone is superimposed in this Biding, there is a distinct 
unconformity in deposition to the Permian series. That 
after the Millstone Grits and the Coal-measures were formed 
there was a period of violent upheaval, during which the 
basin of the Yorkshire Coal Field, as we now know it, was 
separated by the upheaval of the Pennine Chain from that of 
Lancashire. This was succeeded by what must have been 
a long period of denudation, during which the greater part 
of, perhaps all, Yorkshire was subject to the attrition of the 
waves, and its eastern part reduced to a tolerably even 
surface. On this the Permian Limestone has been deposited. 
Where the bed of the sea, or large lake, as the case may 
have been, was composed of the coarse Gritstones of the 
Millstone Scries, we find beneath the Limestone, beds of 
rolled sand and pebbles, derived from and deposited upon 
the ancient shore before the Limestone was formed ; 
numerous examples of this may be seen along the escarp- 
ment, and many have been already mentioned and described. 
Where, however, the prevailing rock forming the coast or 
bottom was shale, as throughout the greater portion of the 
