114 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



are exposed only in the northwest corner of the county ; elsewhere they 

 are buried under the Conemaugh and Monongahela. Professor Bow- 

 noeker gives the record of a well in the eastern portion in which a coal 

 bed is reported at 592 feet below the Pittsburg. It is not altogether easy 

 to determine the place of this bed, but it is very near the place of the 

 Brookville. That coal bed at Steubenville is 673 feet below the Pitts- 

 burg, but in this portion of Harrison the interval from Pittsburg to 

 Ames limestone is 85 feet less than near Steubenville, so that the interval 

 to this bed is within 4 or 5 feet of what should be expected.* 



Tuscarawas county, south from Stark, is west from Carroll and Harri- 

 son. The section in the northern portion differs extremely from that 

 in the southern, but they are connected by intermediate sections showing 

 the gradual change. Full sections have been measured by both Professor 

 Newberry and Professor Orton in the critical localities and their records 

 are in practical agreement, the differences being due apparently to varia- 

 tion in barometric readings. The sections by Newberry are as follows, 

 one at the north and the other at the south : 



Feet. Inches. Feet. Inches 



1. Sandstone [Mahoning] 60 30 



2. Shale 12 10 



3. Mountain ore to 5 



4. Black band 3 to 8 



5. Coal 7 [Upper Freeport] 3 4 



6. Interval 70 35 



7. Coal 6a [Lower Freeport] Thin . . 2 



8. Conglomerate, sandstone, shale [Freeport] 50 52 



9. Coal 6 [Middle Kittanning] 4 4 



10. Shale and fireclay 33 ^ 



11. Impure cannel 1 I 29 



12. Fireclay and dark shale 26 ) 



13. Coal 5 [Lower Kittanning] 2 2 6 



14. Fireclay 4 10 



15. Shale and sandstone 50 79 



16. Putnam Hill limestone 3 1 



17. Coal 4 [Brookville] 2 5 



with to the Zoar limestone an interval of 53 and 46 feet respectively. 

 The Brookville, as a rule, is slaty and sulphurous, with a tendency to be- 

 come cannel ; ordinarily thin, it becomes 5 to 6 feet thick in the southern 

 part of the county, but with no improvement in quality. The Putnam 

 Hill limestone carries ore, is flinty, and rich in fossils. The Lower Kit- 

 tanning, important in the eastern part, is uncertain, often wanting in 

 the western part, as in Carroll county, and the coal exhibits notable 



* J. J. Stevenson : Vol. iii, p. 203. 

 J. A. Bownocker : Bulletin no. 1, p. 231. 



