568 GEOLOGY OF OHIO. 
The gravel beds of the rivers may be mentioned as among the useful 
mineral products. At Coshocton they furnish an excellent material for 
covering the streets of the town, or the clean pebbles might serve well 
for concrete work. 
Indian Mounds.—Two Indian mounds were met with in the county, 
which are worthy of notice, and which have never been explored. One 
is on the east bank of the Tuscarawas River, about three miles below 
Coshocton. It is of conical form, about twenty-five feet high, and of 
about eighty feet diameter at base. Its sides are covered with trees. The 
common road down the river passes close by it. The other one is in the 
river bottom, just above the village of Walhonding, a conspicuous coni- 
cal elevation in the meadow near the road. Evidences of the ancient 
mining of chert for the manufacture of arrow-points, etc., are also 
abundant. 
LOCAL GEOLOGY. 
Jn describing the localities visited, it will be convenient to take them 
up in the order of the townships, beginning at the north-west, and atten- 
tion will be directed chiefly to the coal beds as of principal importance. _ 
Tiwerton.—The highest range of the Coal Measures in this township 
is but little above the gray limestone. Its outcrop is seen on the high 
plateau in the neighborhood of the town of Tiverton, and that of the 
blue limestone about forty feet lower down. The “blossom” of a coal 
bed is occasionally seen in the road to the north of the town, in one in- 
stance, about a mile north from Tiverton, five feet below a bed of “black 
marble,” a black, compact limestone, which has been found in the same 
relative position at a few other localities in the county. This rock ap- 
pears as if it would take a good polish, and be serviceable for ornamental 
purposes. It is known that there are coal beds in the northern part of 
the township, but none of them have been opened except at Phillips’s, 
in the north-west corner, which place was not visited. The hed is xe- 
ported to be small, and it is undoubtedly of little importance or the coal 
would be in some demand. At Tiverton Centre, coal is supplied for the 
use of the blacksmith from Coshocton, twenty-one miles distant, and is 
hauled in wagons, costing at the bank $1.80 per ton, and $5 for hauling. 
Longsinger’s reported bank, about four miles east from Tiverton Centre, 
is a narrow seam of cannel coal of no importance. It is probable none 
of the beds above No. 1 are worth working, or there would have been 
some development made. No. 1 might be looked for to advantage at 
the base of the great sandstone bed, and between that and the Waverly 
shales, for about 200 feet above the Mohican /River. This coal bed is 
opened, and appears well so far as it could be examined at McFarland’s, 
