BELMONT COUNTY. 265 
double, being divided midway by a clay parting six inches thick. The 
only locality at which it appears to be altogether absent is near Sewells- 
ville, where an eroding current has removed the coal and the whole of 
the limestone between it and the Pittsburgh below, replacing them with 
sandstone. 
The removal of these rocks presents some interesting features. In the 
greater part of the county the interval between Coal No. 9 and the coal 
next below is occupied by a massive limestone, varying in thickness 
from forty to seventy feet within Belmont county. West from a line 
beginning in Harrison county, and reaching Belmont at section 12 of 
Flushing township, thence passing south of west to section 23 of Kirk- 
wood township, thence southerly to the National Road, thence irregu- 
larly southward to the Central Ohio Railroad, passing between Barnes- 
ville and the Hendrysburg pike, we find the limestone removed, and 
replaced by sandstone. The following sections illustrate the conditions: 
No. 1, from Barnesville, Belmont county ; No. 2, from Sewellsville, Bel- 
mont county; No. 3, from Moorefield, Harrison county ; No. 4, from Deers- 
ville, Harrison county; No. 5, from New Egypt, Belmont county, to show 
the normal condition. 
Il. 2. 3. A, De 
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1. Coal No. 10. 1. Coal No. 10. | 1. Sandstone,4 0".| 1. Sandstone, 70’, 1. Coal Wo. 10. 
2. Sandstone, 55’.| 2. Sandst’e, 105/.; 2. Limestone, 4’. | 2. Coal No. 8. 2. Sandstone, 35’. 
3. Coal No. 9. 3. Coal No. 8. 2. shale, 5/. 3. Coal No. 9. 
| 
4, Limestone, 54’. 4, Coal No. 8. 4, Limestox e, 70’. 
5. Sandstone, 40’: 5. Shale, 5.! 
6. Coal No. 8. | 6. Coal No. 8. 
A comparison of these sections shows that the limestone of section 5 
has been removed to be replaced by sandstone. That the entire removal 
shown in No. 2 was not the work of a single current is shown by No. lL. 
The first or earlier current exerted its. force before the close of the lime- 
stone-making time, and before the deposition of Coal No. 9.. The lime- 
stone of No. 1 yields a hydraulic cement equal to any manufactured in 
our country. The upper layer of the imestone in No. 5 possesses hydrau- 
lic properties where exposed in the eastern townships, as well as in Har- 
rison county, so that we can not doubt that it is synchronous with that 
at Barnesville. The force of this earlier current must have been ex- 
