68 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



above the Pittsburg, and the Upper Sewickley (8c of the Belmont 

 report) is 3 feet thick at a little way back from the river. 



Four miles south from Bridgeport, at Bellair, is Professor Brown's 

 carefully leveled section: 



Feet Inches 



1. Coal bed Blossom 



2. Interval 53 



3. Coal bed [Waynesburg] 2 



4. Shale and sandstone 18 



5. Coal bed [Little Waynesburg] Blossom 



6. Limestone [Waynesburg] . . . : 3 



7. Concealed 5 



8. Coal bed Blossom 



9. Concealed 14 



10. Coal bed Blossom 



11. Shale, sandstone, concealed 103 



12. Calcareous shale, limestone 24 6 



13. Meigs creek [Upper Sewickley] coal bed 4 



14. Sandy shale 14 



15. Coal bed 8 



16. Clay shale 6 



17. Coal bed and shale [Lower Sewickley] 3 



18. Limestone, shale, concealed 38 



19. Coal bed [Redstone (?)] 2 



20. Interval 17 



21. Pittsburg coal bed 7 



The Sewickley coals are in a vertical space of 28 feet and the top 

 of the Upper Sewickley is 84 feet above the Pittsburg; at Wheeling this 

 interval varies from 80 to 97 feet. The Waynesburg is 167 feet higher, 

 and the blossom, Number 10, is at the place of the Uniontown coal bed. 



The variations in the section between the Ohio river and the western 

 outcrop have proved very perplexing and the sections have been inter- 

 preted differently by different observers. One must depend upon the 

 measurements made by Professor Andrews, those by Stevenson being 

 without value in certain portions of the county, where he clearly lost 

 hold of the section. At Bamesville, 22 miles west from the Ohio river, 

 Professor Andrews obtained a long section, which, condensed is : 



Feet Inches 



1. Shale 8 



2. Coal bed Blossom 



3. Clay 4 



4. White limestone 1 



5. Sandstone, clay, slate, concealed 38 



6. Coal bed, Tunnel seam 2 



