TENNESSEE 145 



estimates and the thickness below number 41 is approximately 675 feet. 

 Professor Safford's section does not extend below the "Wheeler" or 

 "Coal Creek 1 ' bed, number 37 of Professor- Bradley's section. Mr 

 Keith's measurements below that coal bed, made during his work for the 

 United States Survey, differ materially from that of Professor Bradley. 

 His section is 



Feet. Inches. Feet. Inches 



1. Coal Creek seam 



2. Shale 40 



3. Trace of coal 



4. Shale 30 



5. Coal bed 10 



6. Shale.. 25 



7. Trace of coal 



8. Shaly sandstone 90 



10. Shale .' 25 . 



11. Sandstone 40 



12. Shale 20 



13. Coal bed 1 8 to 2 6 



14. Shale 15 



15. Sandstone and conglomerate 110 



16. Shale 15 



17. Sandstone 50 



18. Shale 10 



19. Coal bed 2 6 



20. Shale 20 



21. Sandstone 50 



or about 550 feet below the Coal Creek seam. This section is far from 

 reaching the bottom of the Lee, to which Mr Keith is inclined to assign 

 a thickness of 1,100 to 1,200 feet, with number 11 of this section as the 

 top member. It seems preferable to take number 8 as the top and to 

 regard it as the Bonair, with number 15 as the Etna (Clifit) conglomerate. 

 This interpretation would make the Coal Creek coal bed the Sewanee, 

 and a comparison of the sections above that bed confirms the correla- 

 tion. In all of the sections there is practical agreement as far up as 

 Brady's " Coal bed I," above which for 320 feet (Bradley) or 350 feet 

 (Safford) no coal beds were seen. Mr Keith's section shows four coal 

 beds in the interval. 



The sections by Professor Bradley and Mr Keith were made in the 

 same locality, the lines passing through the Coal Creek mines ; but Pro- 

 fessor Safford's section was made at 3 or 4 miles westward, though the 

 top of the section was within a mile of the highest point reached by 

 Professor Bradley. 



In Professor Safford's section a massive sandstone, 50 to 60 feet thick, 



