(Oils len Jed Qi ables  DeGlliiyee 
THE COAL SEAMS OF THE LOWER COAL MEASURES 
OF OHIO—ContTINvUED. 
MINES OF COSHOCTON COUNTY. 
By Epwarp Orton, JR. 
A general review of the stratigraphical geology of this county, to- 
gether with a brief description of the development of its minerals may 
be found in the report of Prof. J. T. Hodge (Vol. III, Ohio Geological 
Survey, pp. 562-595). Since the publication of that report (1872), its 
coal fields have undergone considerable development; a description of 
their present condition will form the subject-matter of this report. 
Though limestone, sandstone for building purposes, iron ore and 
fire-clays, are found in all parts of the county in limited amounts, yet 
they are of small economic importance, and are of interest mainly as 
geological landmarks. | 
The number and position of the coal veins and the more important 
of the other strata exposed in the county may be seen in the following 
general section : 
GENERAL SECTION. 
No. Name. Equivalents. Thickness. 
18. Upper Freeport Coal and Clay (No. 7 of Newberry) variable. 
17. ci TAGS = eccobo00nononc0g cero 
16. Lower Freeport Coal and Clay (No. 6a of Newberry) : 
15, ye Limestone (Buff Lime_stones) vs 
14. iy Sandstone (Heavy and Massive, pebbly) 80 feet. 
13. Middle Kittanning Coal and Clay (No.6 of Newberry) 3 to 6 ft. 
12. Black Limestone, or Marble (Local) —_— 
11. Lower Kittanning Coaland Clay (No.5 of Newberry) local. 
10. Putnam Hill Limestone and Ore (Gray Lime of Newberry) 4 to 8 it. 
9. Brookville Coal and Clay (No. 4 of Newberry) 2 to 5. 
8. Tionesta Coal (No. 3b of Newberry) local and thin. 
