THE ALLEGHANY COAL FIELD. 103 



should be found if it maintained its separate existence and 

 characters. 



Every observation indicates a want of continuity in the 

 coal bearing strata, the beds thinning out, and even disap- 

 pearing, to be replaced by others, at different levels. This 

 will be manifest, particularly in the coal beds themselves, 

 as shown in the sections here given. They are placed in 

 the same order as the statements of dip, but commence 

 at the Ohio River, going Northward and Eastward into 

 Pennsylvania, and thence Southerly into Virginia and to 

 the Kanhawa valley. They are limited mainly to the 

 "lower coal group." 



No. I. 



SECTION OF THE ROCKS FROM THE MOUTH OF LITTLE SCIOTO, 

 SOUTH 60' EAST, TO SYMMES' CREEK. DIP TWENTY FEET PER 

 MILE. 



Feet. 



1. Conglomerate, passing into sandstone. Its surface 

 ninety feet above low water in the Ohio, and about 

 the level of Lake Erie. 



2. Coal, 2 



3. Shale, 5 



4. Coarse Grit, 50 



5. Thin layers of /?'(9?i 6?re and Coal, - - - 1^ 



6. Coarse Grit, 80 



7. Limestone — dark brown with fossils, - - - 10 



8. /r();i 6>r6, ("BlockOre,") 1 



9. Sandstone and Shales, embracing a thin seam of Coal 

 and a bed of kidney ore, 90 



10. Limestone — dark color, with fossils, - - - 7 



11. Iron Ore — calcareous, (thickness variable,) - 2 



12. Coarse Grit, 40 



13. Coal, (thickness two to four feet,) - . . 3 



14. Grit, Shale and Pipe Clay, 40 



15. Coal — six to twelve inches Shale in the middle, thick- 

 ness variable, 3|- 



