568 GEOLOGY OF OHIO. 



The gravel beds of the rivers may be mentioned as among the useful 

 mineral products. At Coshocton thej 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. 



In 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. 



Tiverton. — 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 Tiyerton, 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 bed is re- 

 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 \Yaverly 

 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, 



