‘1050 -QEOLOGY OF OHIO. 
represent the Centerville coal (Thomas seam), the same heavy ledge of 
sandstone covering the upper seam. ‘The sandstone can be followed up 
the Grassy Fork of Symmes Creek, where it is again found covering 
a coal seam. The latter is well shown on David Williams’s land, Sec- 
tion 2, Madison township. It here consists of two benches, the upper 
one, 14 inches thick, and the lower, 21 inches, separated by an 8-inch 
clay parting. This seems to be the same cval found at Gallia Furnace, 
at 88 feet above the Ferriferous limestone. At Shelton’s bank the seam 
shows the structure represented below: 
FiLGURR CRUD. 
STRUCTURE OF LOWER FREEPORT? 
COAL. (N°6a) AT SHELTON’S BANK NEAR 
GALLIA FURNACE 
Upper! ree port O¢ Sandstone 
sive 
C Mey ard Sale 
CT 
Clay parting bes eh = 
sae ae eee 
Lire clay as _N 
There is a question in regard to the Shelton coal, as is indicated in 
the figure. It has the partings of the Middle Soleus seam, and 
may possibly be on this horizon. 
On J. Calaway’s land, in Section 12, Greenfield, the following 
series is shown: 
Coal, Upper Freeport. 
Interval, 54 feet. 
Coal, 10 inches. 
Coal, Lower Freepor.| Parting, 2 inches. 
Coal, 26 inches. 
Interval, 66 feet. 
Coal, Middle Kittanning. 
About the identification of the lower coal there is no question, as: 
the seam was traced directly into the Evans’s Mill coal, already de- 
scribed. 
