1026 GEOLOGY OF OHIO. 
Ore; bench)ismiallt. 423.22. eee ee JE RES secevce 190 ft. 
Red clay. i itsckaes cu seere enous seen aisle of ote Rush e sieajnise smegoeee mee seeces 10 ft. 
White; clayic.s..ccsc. canton soarcrn aces enone Sicacensureesmace tact watentee 10 ft. 
Bui limestonel (MugwaylOney)) meets ea eee eee nen nen ee 160 ft. 
Interval, not seen. 
Ore bench and buff limestone .............. dee eee TERRES, es cea 140 ft. 
Upper Freeport horizon. 3 
Sandstone, massive, Upper Freeport, 50 ft. thick...........cseessccsseceseones 94 ft. 
Coal) Lower Bree port; 6a, 220, cacteerse sce eter cee eee a 90 ft. 
Interval, not seen. 
Coal, Middle Kittanning, No. 6. 
Clay and shale, 
Sandstone smassiyemeontee int iniclqnesssscamstcceeesheccneeeeenceeseeee rere nena 30 ft. 
Coal, Lower Kittanning, No. 5 (24 feet)..............ccecceeveenee covcccerccenses 27 ft. 
Clay and shale. 
Ferriferous:limestome ‘js. .Seesen tas eee octet chose Se tones tee cee eee en eee O ft. 
Coal, Clarion. 
Sandstone, Hecla, out of which furnace is cut. 
Brookville coal, 23 feet, 50 feet below limestone. 
The two lower seams of the list of coals above given are not known 
to have any economic value in Jackson county. The Lower Mercer 
coal is scarcely more than a mark, especially from the central portions 
of the county southward, and the Upper Mercer, though fairly per- 
sistent, seldom reaches a thickness of more than 16 inches. 
The 38rd, 4th and 5th seams of the list, viz., the Tionesta, Brook- 
ville and Clarion seams are of great value here as in Vinton county. 
Of the seams above the Ferriferous limestone, the 2nd and 4th are 
those of which present account is mainly taken. The Lower Kittanning 
coal, however, often reaches mineable proportions, especially in the 
southern part of the county. 7 
The Lower Freeport is also worked in a few farmers’ banks. 
The Upper Freeport Coal. 
Not much more can be said as to the actual development of 
the Upper Freeport coal, but its possibilities seem greater. Lying 
high in the scale, it holds but small areas in the county, being found 
only in the hills of Bloomfield and Madison townships. It is here 
known by various local names, as for example, the Lucas coal and the 
Ferry coal. The latter is found in Section 23, Bloomfield, with a 
thickness of 5 feet 2 inches. It is not certain that this seam belongs 
to this horizon, but the probabilities are in favor of this reference. 
