62 J. J. STEVENSON — CARBONIFEROUS OF APPALACHIAN BASIN 



As at nearly all localities, the Quakertown coal is double The Mount 

 Savage bed is wanting on this side of the axis. 



The Pottsville is 245 feet thick on the west side of Laurel hill, includ- 

 ing as before the ferriferous shales at the bottom. The mass above the 

 shale is almost wholly sandstone, without any trace of coal ; but on the 

 side of Briery mountain (the Viaduct axis of Somerset and Cambria) the 

 Homewood sandstone is distinct with the Mount Savage coal below it.* 



Almost fifty years ago Professor W. B. Rogers reported on the iron 

 ores of Chestnut ridge near Doctor White's Quarry Run section. He 

 found at the bottom of the section, below the massive sandstone, 65 feet 

 with five beds of iron ore which are described as evidently the same 

 with those of Fayette and Westmoreland counties. Doctor White's in- 

 cidental references show that the ores are persistent on Laurel hill.f 



Doctor White succeeded in making a detailed section along the Balti- 

 more and Ohio railroad under the Briery (Viaduct) axis within Preston 

 county of West Virginia ; it is so important that it is given here almost 

 without condensation. 



Feet. Inches 



1. Sandstone. 60 



2. Coal bed 5 



3. Shale 6 



4. Coal bed 5 



5. Shales, brown, sandy 45 



6. Coal and coaly shale 2 



7. Shale 3 



8. Sandstone 68 



9. Brown shale, traces of coal 4 



10. Sandstone 20 



11. Shale 3 6 



12. Coal bed 5 



13. Shale 4 



14. Coal bed , 4 



15. Shales, some iron ore 136 



16. Coal bed 10 



17. Shales 10 



18. Coal bed 4 



19. Shales, brown, sandy 25 



20. Coal bed 6 



21. Brown shale 20 



22. Sandstone 15 



23. Buff sandy shale 20 



24. Massive coarse conglomerate 20 



Total 342 5 



* I. C. White : Notes on the Geology of West Virginia. Proc. Amer. Phil. Soc, vol. xx, pp. 481, 

 480, 490, 492, 494. 

 f W. B. Rogers : Property of the Pridevale Iron Co. Mining Magazine, vol. iii, 1854, pp. 358-362. 



