728 GEOLOOY OF OHIO. 
to sixty feet. In the river hills Coal No. 5 has been apparently identi- 
fied at Elliottsville, Croxon’s Run, and at Sloan’s Station. It is there 
about three feet in thickness, and rests upon fire-clay and limestone. At 
Croxon’s Run the coal which has been regarded as the Roger is ninety 
feet above the “Strip Vein”—Coal No. 4—which makes it probable that 
it is No. 6, and that Coal No.5 is there cut away and replaced by the 
very heavy bed of sandstone which overlies Coal No. 4. In the boring 
near the mouth of Wills Creek a coal is said to have been passed through 
forty-one feet below Coal No. 6, which is probably No. 5. In the “test 
well” bored by Mr. Blynn, at Steubenville, a coal is reported two and a 
half feet thick, fifty-four feet below No. 6, and in the Rolling-Mill shaft 
a coal seam four feet thick has been reached forty-four feet below the 
“shaft” seam. These are doubtless the same coal, andif the “shaft” coal 
is, as we suppose, No. 6, this is the “Roger.” Further gouth no traces of 
it have been found. 
Coal No. 4.—At an interval of from fifty to seventy feet below Coal No. 
5 a coal seam occurs which is quite persistent in the valley of Yellow 
Creek, and in that of the Ohio between Linton and Sloan’s Station. This 
is what is known as the “Strip Vein” in these localities, and is so named 
from the fact that it was like the “Strip Vein” of Salineville (Coal No. 7), 
first mined by stripping and quarrying in the bottom and along the sides 
of the valley. It is generally about two and a half feet in thickness, a 
hard and bright coal, containing little sulphur, although a large amount 
of ash. It has been most extensively mined at Hammondsville, where 
it has been coked successfully, and it has also been largely shipped for 
the manufacture of gas. Along the Ohio it is sometimes called the “ Bloek 
Coal,” from the fact that it comes out in cubical blocks with smooth faces. 
The “strip” .of Hammondsyille is probably, though not certainly, iden- 
tical with the Leetonia and Hartford coals of Columbiana county. 
Coal No. 3.—This is what is known as the “Creek Vein” in the lower 
valley of Yellcw Creek, so named from the fact that it is generally found 
near, sometimes in, the creek bed. At Irondale the interval which sep- 
arates Coals Nos. 3 and 4 is eighteen feet, at Linton it is twenty feet, at 
McCoy’s Station thirty-six feet, at Elliotsville thirty-four feet, at Croxon’s 
Run fifteen feet, and on Island Creek twenty-two feet. This interval is 
to a large degree filled with black shale, set with nodules of iron ore, 
and a similar shale is sometimes found aboVe No. 4. The Creek Vein is 
usually from three to four feet in thickness, a soft, coking, ‘sulphurous 
coal, not highly esteemed for any purpose. It was formerly called the 
“Salt Coal” in the valley of Yellow Creck, from the fact that it supplied 
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