78 J. J. STEVENSOX — LOWER CARBONIFEROUS, APPALACHIAN BASIN 



ill Franklin and Grundy is not far from 200 feet, but at the north it 

 becomes 225 feet. The Bangor (embracing Hartselle and Bangor of 

 McCalley) is 800 to 900 feet thick at the south, but becomes thinner 

 northward in Grundy and Warren. The upper portion is described as 

 argillaceous and as weathering to bright argillaceous shales — a feature 

 frequently referred to by Mr Hayes in description of the Bangor along 

 the eastern outcrops in this state. No mention is made of any sand- 

 stone in Franklin, but in Grundy and Warren a sandstone 15 to 20 

 feet thick was found at from 150 to 180 feet below the top.^ 



The work by Mr Hayes enables us to make more intelligent use of 

 Professor Safford's detailed statements. That geologist obtained the 

 following section in Franklin county, near Cowan : 



Feet 



1 . Shale and some limestone 85 



2. Limestone 32 



3. Shale and some limestone 70 



4. Limestone 214 



5. Shales and limestone 26 



6. Shale 26 



7. Sandstone 8 



8. Shale 31 



9. Limestone 13 



10. Shale 27 



11. Limestone 196 



Total 704 



below which he found about 110 feet of the Tuscumbia (Lithostrotion). 

 The sandstone is here 437 feet below the top as compared with 280 feet 

 in the Sequatchie valley only a few miles eastward. Number 11 shows 

 cherty layers at 80 feet from the bottom, and the Tuscumbia is apparently 

 chert-bearing limestone throughout. The sandstone of the section ma}' 

 be one of the lower Hartselle.f 



In White county, northeast from Warren, where Mr Hayes found 700 

 feet of Bangor, Professor Saftbrd found 601 feet, which shows that the 

 rate of decrease indicated by Mr Hayes continues. The character of the 

 deposit is changing, as appears from the section, which is condensed 

 from the original : 



Feet 



1. Limestone 40 



2. Mostly shales 115 



3. Shales and limestones 70 



4. Limestone 123 



*W. 0. Hayes: U. S. Geol. Survey folios— Sewanee, 1894; McMinnville, 1895. 

 t J. M. Safford : Geology of Tennessee, pp. 357-358. The section as given is condensed from the 

 original. 



