136 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



pebbly ; but they are thin, about 30 feet, and averaging 40 feet apart. 

 The Cashie and Etna coal beds are insignificant, and the interval to the 

 Lower Carboniferous is from 30 to 40 feet. In Winston, west from Cull- 

 man, the detrital beds are coarser, and sandstone seems to prevail above 

 the Bonair. In counties along the northern outcrop the section remain- 

 ing extends to but a short distance above the Bonair. Both sandstones 

 are present to the last exposure at the west, within two or three miles 

 of the Mississippi line. They retain a thickness of approximate^ 60 

 feet, but toward the west become less massive and are divided by beds 

 of shale. The interval below the Etna, 30 to 40 feet in Marshall, increases 

 westwardly to 60 feet in Morgan and almost 100 feet in Franklin.* 



TENNESSEE 



Returning now to Tennessee, at the Daisy mines, about 20 miles north 

 from Chattanooga, on the eastern escarpment, Mr Hayes obtained a sec- 

 tion as follows : 



Feet. Inches 



1 . Sandstone 50 



2. Shale 10 



3. Coal bed [Sewanee] 3 6 



4. Shale and sandstone 25 



5. Sandstone [Bonair] , 65 



6. Shales and concealed 85 



7. Sandstone 20 



8. Concealed 60 



9. iSoddy coal bed 



10. Clay and shale , 5 



11. Conglomerate and massive sandstone [Etna] 80 



12. Coal bed [Etna] 3 



13. Shales, some sandstone 100 



14. Coal bed 1 6 



15. Shales, some sandstone 155 



16. Trace of coal 



17. Shales and sandstone : 115 



18. Concealed 70 



19. Shales and sandstone 30 



The succession is sufficiently clear. The coal bed number 3, at 260 

 feet above the Etna conglomerate, which here also is the top of the 

 Lookout, is the Slate vein of the Safford Etna section, the Sewanee coal 

 bed of the Tracy City section. The Bonair is present at the Daisy mines 



* H. McCalley : Geol. Survey of Alabama. Warrior coal field, 188G. For Jefferson and Tuscaloosa, 

 pp. 273, 410, 417; Walker, Fayette, and Lamar, pp. 99, 110, 131-134; Cullman, pp. 89, 90, 93: Marion 

 and Winston, pp. 30, 31, 64, G5. 



The Plateau region. For Blount, pp. 208-215; for Marshall, Morgan, and Franklin, pp. 59, 64, 

 65, 69, "'O, 71. 73, 



