7136 GEOLOGY OF OHIO. 
LINTON. 
The geology of the country immediately about the mouth of Yellow 
Creek has been frequently referred to in the pages of this report, and is 
described somewhat at length in the Report on the Geology of Colum- 
biana County, which forms another chapter in this volume. The hills 
which border the Ohio here rise to the height of about five hundred feet 
above the river. Throughout the upper three-fifths of this height they 
are composed of the shales of the Barren Measures, while the two hun- 
dred feet of strata below include all the workable coals in this region. 
With some local variation, this section is parallel with that at Irondale, 
the fall of Yellow Creek keeping pace with the south-easterly dip of the 
strata. 
Coal No. 7 is on the south side of Block House Run, one hundred and 
sixty-six feet above the railroad and Coal No. 4. On the north side, and 
near the station, it is one hundred and eighty feet; further back, at 
Groff’s mine, it is one hundred and ninety-four feet above the railroad, 
which is in turn one hundred and fifteen feet above Lake Hrie. This 
coal is from three to four and a half feet in thickness, and has long been 
worked at the mine of Mr. J. Groff, from which it has taken the name of 
the “Groff Coal.” Its quality is good. On the west side of Block House 
Run it has been known to exist, but has not been opened. The section 
on the Diamond property is as follows: 
FT. 
1.) Shales of the Barren) Coal Measures) 2222... oe eee ee eee ee eee 
ie COMU ING sda reel mle ies Ru ae ANEN MO Ley SL SG INS Jes kikiee i pete ate J esa a ROR 3 
So IPO-Chaiy ye as Rae Ge NE Be Oak MUSE PARE CONUS OUR 21 ok ele eu ere ay ee A 
AS Sale gd ss wee ee Ce ig SC gs TE oe IRIE) Rt Rc a eg a eR OT) 
Be AG PSY, MEStTOME ae er hee ae re we ata 5 
6G. “USandstone and shale jc ek ee crc Ae cae opines adie many MPR ee ty Sree TCE) 
7. Coal No.6. a 
Se MIL O= CLAY Seis ee ee RC yl er eet 5) 
9. Interval. Mostly diese nad sandstone ; povotted &% bores leon No. 2D, 
with limestone under ibs .5. soe oe ee ia ae eek ea alee ee 
10:7 ‘Black:shale; with-lromiores’ Sos aah sek eae matic cya | a SEE) La are eae 
TE "CoaleNo wa SoS briny 71) 3 esc i ae ed ya ela 2S 
125° ‘Hire-clay and limestones: 22.252 he ee eee ees ch = ela a 
13. “Shale, with Won! Ore ys! seis o sels ee a NN a aC cle tee er 
ty VAS \CoatuNes oui( Creek )ce Su wate UAE) FOR OO 2 lc Ea 
Ss ine=cl aye se et eee ae elm ate nea BUN epee ais acta 
16. Shale and sandstone ati a thin call to river. ets pls 
pl 
= om 
a SS 
Coal No. 6, at Linton, is thicker than in any other Biculiee in the 
northern part of the county. It usually runs from six to seven feet, 
but in some places is seven feet three inches. It isa highly coking 
coal, of average quality, containing considerable sulphur, and showing 
