1004 



DR R. KTDSTON, MR T. C. CANTRILL, AND MR E. E. L. DIXON. 



According to memoranda made by Mr Daniel' Jones, the Main Sulphur Coal was 

 being worked in 1809 at the Harpsford or Harpswood Colliery, at the northern end 

 of the Deuxhill outlier, where the seam lies about 2 yards above the Old Red Sand- 

 stone floor ; it is 4 feet 2 inches thick, and the Spirorbis -limestone lies 21 yards 

 above it. hi a deep pit near Eardington, on the main outcrop farther east, the 

 coal w r as found to be 10 feet above the Old Red Sandstone, the Brock Hall Coal 

 being 34 yards still higher. On Chelmarsh Common the latter coal was worked 

 close to the farm from which it is named ; it is presumably the lower of the two 



CHELMARSH 



BILLINGSLEY 



Text-fig. 2. — Diagram showing succession at Chelmarsh and at Billingsley. 



upper seams shown on the Survey map ; below it the Spirorbis-limestone crops out 

 in Borle Brook, while still lower the Main Sulphur Coal was proved, close above the 

 Old Red Sandstone floor. It will thus be seen that, in this part of the coal field, 

 the relationship of the Sulphur Coal Group to the Old Red Sandstone is that re- 

 presented diagrammatically in the left-hand column of text-fig. 2. 



South of Billingsley, however, a new feature appears. At the Billingsley Engine 

 Pit (a little west of the present Billingsley Colliery), the Main Sulphur Coal, instead 

 of being underlain at once by the Old Red Sandstone, is underlain by 48 yards of 

 clunches, rocks, binds, and ironstones, below which follow several sweet coals. The 

 conditions here, then, are those shown in the right-hand column of the diagram 

 (text-fig. 2). These sweet coals crop out and have been worked at Billingsley, 

 Harcott, Bagginswood, and Baveney Wood. 



