1042 GEOLOGY OF OHIO. 
sistent band of shale or clay, 6 inches in thickness. This structure 
would require great care and necessitate unusual labor in preparing the 
coal for the general market. So far as observed, the structure is fairly 
regular. At Olive Furnace, in Section 3, Washington, it shows the 
structure represented in the accompanying figure. 
Close upon the line of its final disappearance, on the land of Henry 
‘Warnecke, Section 15, Decatur township, the same structure is repeated, 
the measurements being almost identical. 
Considerable areas are occupied by the seam in the districts named, 
and the same statements as to mining possibilities are warranted here 
that were made in regard to this coal in Jackson and Vinton: 
2 FIGURE CALY 
STRUCTURE OF LIMESTONE COALON 
HENRY WARNECKE'S LAND SECTION 15 
DECATUR TWP. 
\ 
Ferrife ros Limeston 
Farting black shale 
Loah ae ear 
The seams above the Ferriferous limestone remain to be considered. 
They are divided into the two well-known groups, the Kittanning 
coals and the Freeport coals, both of which are well developed here. 
THE KITTANNING COALS. 
The Lower Kittanning Coal, Coal No. 5—WNo. 6, Kentucky. 
This persistent but seldom valuable seam is found in good thick- 
ness and of fair quality in much of the territory under consideration. 
Its position is well known and easily marked, inasmuch as it lies within 
15 to 25 feet of the great limestone ore horizon. 
