730 



APPENDIX. 



manner expressed in the upper woodcut, p. 465., the curvature and inclination of both having been caused by 

 upheaval from beneath (lower woodcut, p. 465.). The carboniferous beds in question consist, in ascending 

 order, of shale, grit, and sandstone, with ironstone concretions, overlaid by a seam of coal and shale ; then 

 follow alternations of shale, ironstone, sandstone, and grit, including the Espley Rock of the miners (p. 476.), 

 the whole covered by coal, which dips under thin bedded, yellowish grit and sandstone, and passes under the 

 productive coal-field. 



Again, at Shaver's End, above Dudley, the new cuttings beyond the turnpike-gate have laid bare two coal 

 seams, which are thrown off sharply to the N.E., and with great undulations to the S.E., the light-coloured 

 carboniferous sandstone appearing in a broken, uneven-edged mass between them. These highly-disrupted 

 relations of the lowest beds of the coal-field are just what we should expect to find in this part of the district, 

 where volcanic action has been so rife, and has repeatedly forced up the inferior strata to the surface, the 

 points of the volcanic rock often piercing them. 



Having revisited the Devil's Elbow, near Netherton, alluded to p. 499, I conceive that the hard rock cut 

 through by Brewin's tunnel is one of these points of eruptive trap : it throws off the coal measures to the 

 S.E. in the manner described by Mr. W. Mathews, while the sandstones and grits which lie towards 

 Netherton Church are arched over the trap in separate hillocks. 



D. (3.) 



No Coal in the Old Red Sandstone. 



It was stated in a note, p. 189 ante, that although unknown in the region described in this work, certain 

 coal-seams do occur in the Old Red Sandstone of the South of Scotland. Although this was the opinion of 

 some modern observers, it would now appear that a certain Red Sandstone of Berwickshire which was supposed 

 to be Old Red, is the Lower New Red, and hence the carboniferous strata associated therewith do not offer any 

 exception to the general distribution of coal in the series of British deposits. As yet, therefore, we have no 

 example of a coal-bearing stratum in the Old Red Sandstone. — (See Geology of Berwickshire, by Mr. D. Milne ; 

 a memoir read before the British Association for the Advancement of Science, 1838.) 



E. 



Joints. 



It was my intention to have followed out a plan, first suggested to me by Professor Phillips, of registering 

 in a table the differences in the direction and inclination of all the faces of joints in rocks of different 

 composition and age ; but though my field-books are full of data, I am not prepared to offer them to the 

 public. — (See Phillips's Guide, p. 173.) 



F. (1.) 



Shelve and Corndon Hills, %c. ; — Lead Mines, Bitumen, fyc, in the Silurian Rocks of — Antiquities of. 



The mines of these hills have been treated of at some length in reference to their geological relations 

 pp. 227 et seq. They are, however, of too great importance not to be also noticed in an economical point 

 of view, as will appear from the following table of their produce in 1835. 



