998 GEOLOGY OF OHIO. 
opening made by W. W. Poston shows the following structure of this 
coal : 
Shale roof, 8-10 feet seam. 
Coaber sce e sites Sean Seecae eee ne Nae eet eelctetaae ents NG subse ana ee 7 inches. 
BIA CK SlAtG i cses ahs ees eraser maa scemecleolisen save mentan suet ates 3 ss 
Coalscood quallityarenwmunscccenscscscccssoconatcseneciae 10 i 
Fire-clay and DOMe@. io. ccccsceteesteclets sive se sense cies sales 6 ct 
(oy) DN eae u UN Cee C Fru NN AN A ADEE COL ae eon A a 10 * 
Parting, thin. 
Coale sagt cteieres tees Ce nse AEC ahG ase anion as eslao teen ea nts 12 a 
ClayAsholdineiseampoiotlinteeesseercsmesesssse ee cr: oO s 
Coal Pbottomlibench esis esekes sacs eeee ae acuacucek ceene eae: 10 ef 
Fire=c] ay, cin tihinssctieatices sicbise cate acencienencenasenatndaceoe sats —_ 
Entire thickness of S€am.......... csssceeres ees 64 i 
Mntire thickness of coal..................-0.-.-.. 49 oh 
Avail aD levGOallisteis.n tia censeeaeeee com atecereseers 39 “in 4 benches. 
In a ravine a few hundred yards east of this exposure, the seam, 
as opened, shows much less volume. The position of the coal is from 30 
to 40 ft. above the Lower Mercer limestone, which is universal through- 
out the region. The second bench appears to be of excellent quality. 
The remainder seems somewhat long-grained and coarse, but quality 
cannot be properly judged from this mere outcrop. 
On the Bryson farm, on Wheelabout, south of Zaleski, the Lower 
Mercer coal is shown in the creek banks with a thickness of 4 feet.’ It 
is covered by calcareous, fossiliferous shale. The Tionesta coal, now 
under discussion, is found here 40 to 44 feet above the lower coal, also 
showing a thickness of about 4 feet. The Brookville coal is also found 
at its proper level, about 20 feet above the Tionesta. 
On the land of Mr. H. R. Demming, S. W. # Section 23, ‘Madison, 
the same seam is again found in excellent development. ‘The structure 
is shown in the appended figure: 
FLGURE CXX WAL 
SECTION OF. H1.R.DEMMINGS COAL. 
SVake) Reon le kee ——— 
Ridtken Woah o.2.umiti 
Good Coal 
Clay parting 
Sue i A RE lee : 
Fice-clay CO ene ae 
