1869.] 



HFLL GEOLOGY OP CHESHIRE. 



183 



of the great formation of Warwickshire. To the north and to the 

 south of this barrier the Permian formation exists under two distinct 

 phases or types of character ; and the occurrence of such a dividing 

 ridge as I have indicated seems to offer the most satisfactory ex- 

 planation of these differences in composition and arrangement. 



Fig. 3. — SJcetcJi Map of part of Lancashire, Cheshire, and Shropshire, 

 shelving the position of the concealed ridge of Lower Carhoniferous 

 HocJc, or anticlinal axis, and of the Coal-measures to the north and 

 south of the aotns. By Edward Hull, F.R.S. 



Coal-measures 

 at the surface. 



Permian Beds. 



Triassic Beds 



overlying 

 Coal-measures. 



Triassic Beds 



resting on strata 



older than the 



productive 

 Coal-measures. 



EXPLANATION OF MAP. 



This Map is intended to show the position of the existing Coal- 



