LOGAN COUNTY. 485 



ships. Its thickness is probably between sixty and one hundred feet, 

 but no where in the county have both top and bottom been exposed at 

 the same place, and the records kept of borings are so imperfect as to be 

 worthless. The largest quarries are those of Messrs. Scarf, at Beilefon- 

 taine, of General A. S. Piatt, on the Makachack, in Monroe township, 

 and Mr. J. B. Sharpe, at Middleburg. Messrs. Scarf's quarry has been 

 worked for a depth of over twenty feet, chiefly for lime, one thousand 

 bushels of which are produced by twenty-five. oords of wood. The pro- 

 duct is of good quality and color, but difficult to ship, on account of the 

 rapidity with which it air-slacks, only three or four days being required 

 to reduce it 



Some courses show hydraulic qualities, but no systematic experiments 

 liave been made with it, nor could any estimate be had of the amount 

 of business done. 



General Piatt's quarry has been worked to about the same depth, and 

 the lime produoed by the same expenditure of fuel, and of perhaps 

 srather better quality. The building stone has been all consumed in the 

 neighborhood. It is capable of being worked to fine effect, as the 

 CreneraPs own mansion abundantly testifies. Mr. Sharpens quarry, at 

 Middleburg, has been worked to about the same depth as the others, but 

 with more system^ and exposes the rock better. The Bection may be 

 described as — 



yEET. 



Covering of Drift , z . . 2 



let coarse, nni(3i 'brofe«n • 6 



2d " solid 4 



Ocheroas seam. 



3d course, firm, ttiiii layers ... . 3 



4tli " solid 4 



5tli " " - - 6 



23 

 Numerous small quarries have been opened ail around the edges of the 

 island, both for stone and for lime, but they are only worked occasionally 

 and for local purposes. 



The geological scale of the State calk for a bed of Oriskany Sandstone 

 under the Corniferous, and of Hamilton above it, but there are no traces 

 'of either to be found in Logan county. Dr. Newberry (Vol. I., p. 141) 

 speaks of Oriskany Sandstone at West Liberty, but this is most probably 

 a mistake. In General Piatt's quarry, on the Makachack, a bed of fine 

 sandstone exists, that has been quarried and reduced to sand for plaster- 

 ing, with excellent success, but it is only a local deposit in the upper layers 

 ©f the Corniferous, fifty-five feet above the top of the Helderberg, in the 



