250 



COAL MEASURES. 



Section of Coal Strata at Wheeling, Va. 



1. Yellowish cla7j. 



2. Sand rock — argillaceous and 

 slaty. 



3. Silicious rac^-resembles horn- 

 stone. 



4. Clay, or argillaceous deposite, 

 with nodules of limestone. 



5. Sandstone — fine-grained, used 

 for grindstones. 



6. Coal. 



7. Limestone rock. 



8. Bituminous Coal. 



9. Slate clay, 

 7 (l^^^^l 10. Coal. 



^ r^^^^^^^5 SlcilG clay, 

 li^^^^^^ 12. Limestone rock, 

 25 ^^^^P 13. Sandstone rock. 

 60 ; — ^ 14. Slaty clay, 



182^ ^^^^^ 15. Bed of Ohio river. 



■A 



Note. — A mile and a half from this section, a bed of coal 12 

 feet thick crops out from the side of a hill at such an angle of 

 elevation, that, were it continued, it would be at the height of 

 200 feet above stratum No. 1 of the series ! 



Feet Fig. 46. 



