142 | GEOLOGY OF OHIO. 
has no value in this part of the State, and requires here no further 
notice. 
From one hundred and fifty to two hundred feet above Coal No. 1 two 
other seams come in, which are sometimes of workable thickness. These 
we have designated as Coals No. 3 and No. 4. They are separated by a 
distance of thirty to fifty feet, and are usually both overlain by lime- 
stone. Sometimes, however, one or both of the limestones are replaced by 
shale. These coal seams, here as elsewhere, have proved to be quite 
irregular in their thickness, although in a general way continuous from 
Portage through Summit, Stark, Wayne, Holmes, Coshocton, etc., to and 
beyond the National Road. Both these coals may be seen in the north- 
eastern corner of Atwater, where the north and south road crosses a small 
stream, and not far from. the locality where so much fire-clay is dug. 
Here the limestone of No. 3 shows in the bed of the brook at a level of 
twenty feet above the railroad at Atwater, or five hundred and eighty 
feet above Lake Erie. It is about four feet in thickness, and, as usual, 
has iron ore over it. The coal beneath is only a few inches thick. Some 
twenty feet above the limestone Coal No. 4 is seen in the road, here ap- 
parently four feet thick, but with scarcely any covering. No limestone 
is visible over it. 
In Limestone Ridge, in Freedom, both these strata are shown. The 
upper one is thin, but is overlain by limestone, which is here burned for 
quicklime. Coal No. 3 is seen in the road at the south end of Limestone 
Ridge; as usual, it is underlain by a thick bed of fire-clay. | 
On the farm of Wilson Davidson, about half a mile distant from the 
last-named locality, this coal has been mined, though not largely, for a 
number of years. It is here about twenty-two inches thick. From the 
fact that this seam was represented.as Coal No. 1 by the geologist who, 
when connected with the first Geological Survey of the State, made an 
examination of this region (Annual Report of 1888, p. 59), no thorough 
exploration has ever been made of the strata below it. Possibly such ex- 
plorations would have been fruitless, as the lower seam is so frequently 
absent from its place; but as the true position of Coal No. 1 is at least 
one hundred and fifty feet below Mr. Davidson’s coal, it is evident that a 
large area in the vicinity dererves examination by deep boring. Con- 
siderable money has been spent in boring in Freedom, but, so far as I can 
learn, none of the wells have been carried deep enough to determine the 
presence or absence of the lower coal. One well bored on Limestone 
Ridge is reported to have furnished the following section : 
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Od IUTMIEONNE) Ghamda GOK 8 eh OGds FobR ho doG5 660060 6656400 banbo6 4606006 3 
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