THE FOSSIL FLORA OF THE SOUTH WALES COAL FIELD. 



567 



III. General Section of Seams in the thickest portion of the South Wales Coal Field, 

 compiled from various sections in the neighbourhood of Loughor. 



Upper Pennant Series ( Upper Goal Measures). About 2500 feet thick. 





Feet. 



Ft. in. 



Strata, .... 



126 







Upper Coalbrook Seam, . 









* . • 



3 







Strata, .... 









24 







Middle Coalbrook Seam, . 









. > . 



3 







Strata, .... 









42 







Lower Coalbrook Seam, . 











2 



10 



Strata, .... 









286 







Penscallon Vein, 











2 







Strata, 









59 







Little Loughor Vein, 











1 



5 



Strata, 





j 





123 







Broad Oak or Loughor Vein, 









. . • 



5 







Strata, 





(about^ 



1 



100 







Rosy Vein, 











2 







Strata, 









56 







Fiery Vein, 











2 



9 



Strata, 









112 







Golden Vein, 











1 



10 



Strata, 









112 







Bushy Vein, 











1 



10 



Strata, 









216 





, , , 



Vaith Seam, 











4 







Strata, 









258 







Coal, 











2 



6 



Strata, 









174 







Great Vein, 











9 







Strata, 









360 







Six Feet or Graigola, 









. .. 



4 



6 



Strata (with a small seam), 









54 







Llansamlet 3 Feet, 











2 



6 



Strata, 









132 







Llansamlet 2 Feet, 











2 



Lower Pennant Series. (Transition Series.) (About 5000 feet thick.) 





Feet. 



Ft. in. 



Strata, ...... 



588 





Slatog Vein, ..... 





2 



Strata, .... (about) 



200 





Rotten Vein, ..... 





2 



Strata, ...... 



208 





Sluice Pill or Hughes' Seam, 





4 



Strata, ...... 



978 





Hendy Seam, ..... 





2 6 



Strata, ... 



250 





Penlan or Levisfach Seam, 



... 



4 



