370 D. Jones — On the Carboniferous Deposits of Shropshire. 



mils Lane. — Section E. ft. in. 



1. Best Coal 2 5 



2. Basses 7 



3. RandleCoal 2 8 



4. Clunch 1 



5. Clod Coal 1 4 



6. Clod Coal Clunch 4 



7. Clod with Ironstone (large nodules of Ironstone) 2 6 



8. Hard Kock 4 



9. Little Flint Coal 4 



10. Eock in the Coal 5 3 



11. Lower Little Flint Coal 2 6 



Amies {Broseley). — Section F. 



1. Best Coal 3 4 



2. Middle Coal 3 



3. Clod Coal 1 8 



4. Pricking 1 



5. Clod Coal, Pennystone 3 



6. Black Clod 2 3 



7. Hard Stone 3 



8. Flint Coal 3 



If we turn back to Section C, which is that of Harcott, and compare 

 it with the foregoing, I think we shall find an unmistakable 

 similarity which we may most readily express as follows : 



C11 = D1, El, Fl. 



C 13 = D 3, E3, F2. 



C 15 = D 5, E 5, F 3. 



C 16 = D 6, 7, E 6, 7, 8, F 4, 5, 6, 7. 



C 17 = D 8, E 9 and 11, F 8. 



C 19 must be a greater development of the Lower Flint Coal or 

 the Crawstone Coal. I have drawn these out to a scale, and find a 

 very satisfactory comparison. 



The strata above these Coals, though they are not so obviously 

 continuations of the Coalbrook-dale strata, yet in connexion with the 

 same strata at Cornbrook there is much to be said about them. 



I have shown before how the ground between the Best Coal and' 

 the Pennystone might at Harcott be 190 feet thick, or even more at 

 Cornbrook. Now, at Cornbrook we find at 153 feet above the repre- 

 sentative of the " Best Coal," there is a stratum of Pennystone 6ft. 

 thick. At Watsell pit it is 135 feet between the two. The Penny- 

 stone is not shown in the Brown Clee, because, as at Sbirlot, it has 

 been denuded. At Knowlbury, a little south-west of Cornbrook, the 

 Penny-measure is not recorded in the section ; but 150 feet above 

 the Great Coal is a stratum of Bind 6 feet thick, lying between a 

 White Eock 14 feet thick above and a hard White Eock of 42 feet 

 below. At 90 feet above the Bind is " Measure containing large 

 nodules of Pure Ironstone," but I am not inclined to think it is the 

 equivalent to the Pennystone. I will not say it may not be the 

 equivalent of the Ball Stone, but of this I am quite doubtful, as 

 there is no means of accounting for the absence of the Coals, which 

 are so thick and numerous in this horizon in the Coalbrook-dale Field. 

 I am inclined to think that the Bind holds the place of the Penny- 

 stone, and if Ironstone is not mentioned, it is because the whole 

 stratum degenerates in thickness and Ironstone. We observe that 

 at Cornbrook and Knowlbury there are no Coals to represent the 

 Sulphur, Viger, or Sill Coals. Indeed when we find that at 

 Madeley Meadow Pit the Sulphur Coal is only 1ft. 4in., the Viger 

 1ft. 3in., and this in obedience to a law of Southerly attenuation, I 

 do not think we can be much surprised if they are absent altogether 

 at fifteen or sixteen miles further South. 



