216 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



tucky. The conditions observed along the eastern border northward 

 from the Kanawha appear in Mingo county, where one has 170 feet of 

 sandstone, mostly pebbly, to calcareous red shales, which may be at the 

 horizon of the Ames limestone and the Pittsburg reds. No trace of 

 limestone is seen at more than 4 or 5 miles east from the Big Sandy.* 



Allegheny and Conemaugh in the Anthracite Fields 

 southern and middle fields.^ 



The column in the southern field is much longer than in the Middle, 

 approximately 2,500 feet remaining in the deepest parts of the former, 

 while only 1,500 feet are reported from the latter. The succession, de- 

 scending, near Pottsville, in the Southern field, is : 



Feet 



1. Brewery coal bed 



2. Interval 220 



3. Salem coal bed 



4. Interval 100 



5. Faust coal bed 



6. Interval 175 



7. Tunnel coal bed 



8. Interval 165 



9. Peach Mountain coal bed 



10. Interval 155 



11. Yard coal bed 



12. Interval 70 



13. Tracy coal bed 



14. Interval 46 



15. Tracy coal bed 



16. Interval 65 



17. Little Clinton coal bed 



18. Interval 55 



19. Clinton coal bed 



20. Interval 110 



21. Little Diamond coal bed 



22. Interval 40 



23. Diamond coal bed 



* E. V. d'Invilliers : West Virginia and Ohio railroad, p. 9. 

 M. R. Campbell : Charleston and Huntingdon folios. 

 I. C. White: Vol. ii, pp. 259, 279, 280, 377. 



| Detailed references to authorities will not be given for the anthracite fields. 

 Descriptions of the coal beds, for the most part, have been compiled from Mr A. W. 

 Smith's summary in the Final Report of the Second Survey ; the features of the intervals 

 between coal beds were ascertained by comparison of sections given in the atlases 

 accompanying Report A A. The work by Messrs Ashburner, Hill, and Smith is so 

 interlocked that one finds difficulty in assigning proper credit to each observer. Use 

 has been made also of Mr B. S. Lyman's studies in the northern part of the Southern 

 field. 



