138 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



southern Braxton it has varied from 150 to 165. In much of the area 

 the Upper Freeport has been accompanied by its plant-bearing shales 

 and in most of the area the interval to the Brookville coal bed has been 

 occupied by sandstone; whether or not an intermediate coal bed is per- 

 sistent is uncertain; it is wanting in the well records. 



For a distance of about 16 miles from Frametown no sections are 

 available, but at Clay Courthouse, in Clay county, southwest from Brax- 

 ton and northwest from Nicholas, is a section by Doctor White, thus : 



Feet 



1. Concealed with much red shale 90 



2. Coarse pebbly sandstone 60 



3. Concealed, shales, some red 100 



4. Massive sandstone, large quartz pebbles 60 



5. Concealed and sandy shales 130 



6. Coal bed 2 to 3 



7. Fireclay, shale 10 



8. Sandstone, massive, pebbly 90 



9. Concealed and sandstone 160 



10. Black shale and thin coal 3 



11. Massive sandstone and concealed 100 



As Number 10 is just below the Black Flint, it is at the Brookville- 

 Stockton horizon. The interval between this bed and Number 6 is too 

 great, the measurements having been made without regard to the dip, 

 and the thickness is probably nearer to 230 feet. This is 90 feet more 

 than the interval between the Brookville and Upper Freeport at 12 miles 

 eastward in northern Nicholas. Associated with the upper bed are 

 plant-bearing shales, from which were obtained the specimens discussed 

 by Mr David White, who referred them to the Freeport horizon. The 

 Brookville is much degraded .at Clay, being merely black shale with 

 streaks of coal. 



Five miles below Clay, near Yankee Dam, the upper coal bed is 3 feet 

 4 inches thick and 310 feet above the Coalburg coal bed, somewhat less 

 than at Clay, where the interval is about 330 feet. This, if the interval 

 between the lower coals remain the same, would place the upper bed at 

 about 210 feet above the Brookville-Stockton. The Upper Freeport 

 here is 150 feet below the top of a great pebbly sandstone on which rest 

 reddish shales succeeded by deep red beds. 



According to Doctor White, this bed is traceable in the river hills 

 from the Yankee Dam locality to and beyond Queens shoals; at that 

 place, 10 miles west from Clay, the coal is 175 feet above the Black 

 Flint, with 200 feet of mostly massive pebbly sandstone intervening be- 

 tween it and the lirst red beds of the Conemaugh, which are 110 feet 



