122 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



side of the Sequatchie valley. Mr Hayes obtained sections in northeast 

 Marion 2 miles apart, which illustrate the structure, as follows : 



I II 



Feet. Inches. Feet. Inches 



1 Conglomerate and coarse sandstone 20 60 



2. Shale 50 25 



3. Coal bed 1 12 



4. Shale and sandstone 150 125 



5. Coal bed 6 6 



6. Shales and sandstone 200 200 



7. Sewanee coal bed 4 to 5 9 4 



8. Shale and sandstone 45 40 



9. Coal bed [Jackson] 1 



10. Shale 5 10 



11. Conglomerate and shale [Bonair] 70 65 



12. " Cliff vein " coal bed 8 8 



13. Cross-bedded sandstone [Cliff, Etna] 100 95 



14. Coal bed [ Etna] 



15. Sandstone and shale 210 200 



16. Coal bed 9 9 



17. Shales 60 50 



to the Bangor limestone. In the second section a coarse sandstone, 



apparently almost 100 feet thick, begins at about 50 feet above the 



Sewanee coal bed ; it is not so well shown in the other. This is the 



sandstone which it 86 feet at Tracy. The sandstone at 60 feet higher 



and about 70 feet thick is evidently the Rockcastle, the interval to the 



Bonair being somewhat less than 270 feet, only 30 feet more than at 



Tracy City, 14 miles toward the west. The " Cliff vein " of the section 



is not the bed known by that name in Alabama, which underlies the 



Cliff sandstone and is the Etna of Safford. The relations of the coarse 



sandstone at the top of the section are not clear; it is too near the 



Rockcastle to be the Corbin — at least such appears to be the condition 



by comparisons of the sections alread} r given. 



Farther south along the west side of the Sequatchie valle}^ are two 



sections of the lower beds b}^ Safford 



I II 



Feet. Inches. Feet. Inches 



1. Conglomerate [Bonair] 



2. Shale and coal Thin to 1 6 



3. Sandstone and shale 60 68 



4. Cliff sandstone 90 105 



5. Coal bed [Etna] 2 Thin 



6. Shale 10 ' 8 



7. Shale ... 6 



8. Coal bed 4 1 to 4 



