110 Mr. F. Forster's Observations on the South Welsh Coal Basin. 



31. 

 32. 



33. 



34, 

 35. 

 36. 



37. 



38. 



39. 

 40. 

 41. 

 42. 

 43. 

 44. 



45. 

 46. 



Fms. 



Brought forward, 42 



Grey Metal, mixed with Post 



and nodules of Ironstone,... 12 

 Red Shale, mixed with no- 

 dules of Grey Post, 5 



Grey Post, ,3 



Red Shale, with nodules, .... 6 

 Grey Post, with Clay " backs," 2 

 Red Shale, mixed with Blue 



Metal Stone, 2 



Strong Grey Post, 5 



Grey Metal Stone,mixed with 



Post and Blue Stone, 4 



Strong Grey Whin, 1 



Strong Blue Stone, 1 



Blue Metal Stone 2 



Strong Grey Post, 3 



Soft Blue Stone, 



Foul Coal, mixed with Black 



Stone, 



Light Grey Thill, 



Foul Coal, mixed with Black 

 Stone, 



Ft. In. 



1 2 



4 



6 



3 6 



2 6 

 2 



2 4 







1 2 

 



2 10 

 6 

 

 lOi 



6i 

 9i 



1 8 



Carried forward, 92 



Fma. FU 

 Brought forward, 92 



47. Dark Grey Thill, 



48. Black Stone,mixed with Coa^, 



49. Foul Coal, 



50. Dark Grey Thill, 1 



51. Grey Metal Stone, 1 



52. Black Stone, with beds of 



Coal from 3 to 8 inches 



thick, 1 



53. Strong Grey Post, 1 



54. Ditto, with " Coal Pipes," 



and Blue Stone 2 



55. Grey Post, with soft Grey 

 Metal « backs," 2 



56. Soft Black Stone, .,, 1 



57. Glo Braisc, or Big Coal 



Seam, 



58. Soft Grey Thill, 1 



59. Soft Grey Post, 1 



60. Very strong Grey Post, .... 2 



In. 







^ 



2 



4 







9^ 



1 



H 



1 



4 



2 



10 



2 



4 



2 







4 









6 





4 6 









A 5" 









2 6 





Total, 109 1 Oi 



From 7 to 9 fathoms deeper the Yard 

 Seam is found. 



The nature of the Coal seams in the above Section, has been already described. The 

 different strata have been named according to the terms made use of in the Newcastle Coal 

 District, on the presumption that they would be best understood, and, in the absence of any 

 t'eneral, or scientific terms, sufficiently descriptive of their nature. It is greatly to be 

 reo-retted that no general class of names has hitherto been adopted for the different strata 

 occurrino- in Coal-fields, and, as having a probable tendency to facilitate this desirable object, 

 the following explanation of the terms made use of in the above section may not, perhaps, 

 be deemed uninteresting. 



Strong Grey Post, the " Quarr" of the Welsh Miners, " Grey Rock" and " Rock binds" 

 of Staffordshire, is a Sandstone nearly equivalent to the " Post" of the Newcastle Coal-field. 

 Throuo-hout the Welsh Coal district it is, however, generally much darker coloured, appa- 

 rently from a mixture of Carbonaceous matter; it is usually intersected by a great many 

 backs or partings, and hence, in sinking, wherever the strata are highly inclined, it be- 

 comes necessary, notwithstanding the hardness of the Sandstone, to secure the sides of the 

 pits by walling or timber. Owing to the same cause it is also generally an inferior building 

 stone. The term Grey Post is applied to such of the beds as are softer, and contain a 

 greater proportion of Argillaceous matter than Strong Grey Post. 



