CARBONIFEROUS PERIOD. 331 



alphabet. is added; and also that by Lesquereux (the latter in parentheses), as 

 made out from a supposed parallelism between the Kentucky and Pennsyl- 

 vania beds. 



Feet. 

 Millstone Grit ? 



1. COAL No. A, with 4 feet of shale [1 A] .' 6 



2. Shale and mud rock 40 



3. COAL No. B [IB]. (Equivalent of Mammoth bed) 3-5 



4. Shale, with some sandstone and iron-ore 20-40 



5. Fossiliferous Limestone : 10-20 



6. Buhrstone and Iron-ore 1-1 £ 



7. Shale 25 



8. COAL No. C. The Kittaning Cannel (equivalent of the Cannel of 



Peytona, Va. and Darlington, Pa.) [2] 3i 



9. Shale, — soft, containing two beds of coal 1 to 1£ feet thick 75-100 



10. Sandstone 70 



11. Lower Freeport COAL bed No. D [3] 2-4 



12. Slaty sandstone and shale 50 



13. Limestone . 6-8 



14. Upper Freeport COAL, No. E of Lesley [4] , 6 



15. Shales 50 



The Upper Coal measures are continued in western Pennsylvania, to the Pitts- 

 burg coal inclusive, as follow : — 



Feet. 



1. Mahoning Sandstone 75 



2. COAL No. F [5] 1 



3. Shale; thickness considerable ? 



4. Shaly sandstone 30 



5. Red and blue calcareous marls 20? 



6. COAL No. G [6].... 1 



7. Limestone, fossiliferous 2 



8. Slates and shales , 100 



9. Gray clayey sandstone 70 



10. Red marl 10 



11. Shale and slaty sandstone 10 



12. Limestone, non-fossiliferous 3 



13. Shales 32 



14. Limestone 2 



15. Red and yellow shale 12 



16. Limestone 4 



17. Shale and sand 30 



18. Iron-ore (spathic) 25 



19. Limestone 1-1$ 



20. Pittsburg COAL, No. H of Lesley [11] 8-9 



The upper part of the Upper Coal measures (above the Pittsburg bed) in 

 western Pennsylvania (Waynesburg, Greene co.), according to Lesley, includes, 

 commencing below : — 



