366 Z). Jones — On the Carboniferous Deposits of Shropshire. 



originally deposited at an average thickness of 250 feet over the 

 whole district, there may have been an upheaval of it to the extent 

 of about 600 feet, previous to the deposition of the Four-feet and 

 other Coals in the same horizon. Two hundred feet of it having 

 been denuded, the "Four-feet Coal" was then deposited, covering the 

 accumulated Coal-measures of the lower ground, and rising high 

 enough to rest upon the Millstone Grit at Brown Clee (vide Fig. 1). 

 Now this explains to us the anomaly of the same Coals resting 

 upon Old Eed Sajidstone, as at Harcott. 



Cornbrook. 

 GREAT COAL 



FlQ.l. 



N. 

 Brown Clee. 



1. Coal-measures. 



2. MOlstone Grit. 



3. Old Red Sandstone. 



Marcott Coals and Cornhrooh. — I had examined these Coals some 

 months since when working, in the forest of Wyre. Seeing that 

 there was a distance of 420 feet of Coal-measure, and 200 to 300 

 feet of Millstone G-rit, lying between the main Coals of Corn- 

 brook and the Old Eed Sandstone, whereas at Harcott the Coals 

 were within thirty feet of the Old Eed Sandstone, I could never have 

 supposed they were identical. The Harcott pits are sunk in the 

 valley cut by the brook-course flowing by Farlow Factory at the 

 N.E. end of Clee Hill Common towards Kinlet. They are near to the 

 Western margin of the forest of Wyre Coal-field. In sinking there, 

 and at Billingsley, they pass through the Sulphur Coals of the 

 Younger Coal-measures, and at various distances below them come 

 upon important Coals and Ironstones, which might be very naturally 

 supposed to belong to the Clee Hill basin from its being so near, but 

 there was the difficulty before mentioned of having no lower Coal- 

 measure and no Millstone Grit; and again there was no sort of 

 comparison to be made with the lowest or Gutter Coal. I therefore 

 concluded they were either connected with the Coalbrook-dale dis- 

 trict, or were formed in a small depression marginal to the great 

 deposits of Coal-measure to the East and North-east. 



The section of the Harcott Pit shows the following features : — 



Section C. 



1. Coal-measures ... 



2. Blue Bind 



3. Coal ... 



4. Measures 



5. Black Shale 

 G. Measures 



7. Coal ... 



8. Measures 



9. Black Parting ... 



10. Measures 



11. Sweet Coal 



12. Ironstone and Rock 



13. Coal 



14. Clod ... ... ... 



15. Coal 



16. Black Clod and large balls of Ironstone 



17. Coal 



18. Clod 



19. Coal 



157ft 



Oin 



6 







1 







26 







1 







100 







1 



3 



12 











6 



5 







4 



6 



3 











9 







6 



1 



8 



5 







6 







2 



6 



2 



6 



