THE CARBONIFEROUS SYSTEM. 145 
well, having a thickness of about 3 feet, and of good quality. In the 
southern part of Tuscarawas county Coal No. 5 is generally thin, but of 
good quality. At Urichsville it lies 30 feet below Coal No. 6, is 24 to 3 
feet thick, and not worked. At Port Washington it has been opened on 
the property of the new furnace company, and its fire-clay, there plastic, 
is used for the manufacture of fire-brick. It is here 8 feet thick, and les 
at about the level of the base of the furnaces. On the bank of the river, 
in the same vicinity, it is 4 feet thick, and lies 45 feet above the gray 
limestone, and 65 feet below Coal No 6. 
In northern Muskingum and Guernsey, Coal No. 5 thins out and dis- 
appears over quite a large area. Here the interval between Coals No. 4 
and No. 6 diminishes locally to 20 feet, just as at Fredericksburg, Wayne 
county, and we have in these two localities the opposite sides of the 
basin in which Coal No. 5 and a great thickness of associated strata 
were deposited; a good example of local subsidence during the formation 
-of our Coal Measures. “Twelve miles north of Zanesville Coal No. 5 ap- 
pears again, thickening to the south.” (Stevenson.) 
In central and southern Muskingum county, Coal No. 5 is the first 
workable seam above the Putnam Hill limestone, distant from it from 
25 to 65 feet in different localities. It varies in thickness from 4 inches 
to 45 feet, and is generally esteemed as a good coal. It is the lower bed 
at Rocky Point, 22 feet below the Nelsonville seam, with iron ore over it. 
At Joseph Porter’s, Hopewell township, it is 3 feet thick, 47 feet above the 
Putnam Hill limestone, and 45 feet below the Nelsonville coal. At 
Fork’s Mill Run, near Zanesville, it is 4 feet thick, 28 feet below the Nel- 
sonville coal, and 65 feet above the Putnam Hill limestone. 
‘In Perry county this is known as the lower New Lexington seam. It is here 
quite persistent, and has been considerably mined. At the mines of the Miami Com- 
pany, on the branch of the Zanesville and Cincinnati Railroad, it is 3 feet 10 inches 
thick, and is 22 feet below the Nelsonville coal.” (Andrews.) 
About Nelsonville, Coal No. 5 seems to be generally present, though 
scarcely at all worked. It is from 3 to 4 feet in thickness, and is said to — 
be of good quality. 
“At the mines of the Hocking Valley Coal Company, York township, Athens 
county, this seam is found at a distance of 273 feet below the main Nelsonville 
seam. It was not measured, but is there popularly called the ‘‘3-feet vein.” (An- 
_ drews.) 
On the west line of Ames and Trimble townships, Athens county, Coal 
No. 5 lies 35 feet below the “Great vein” (No. 6), and 30 feet above the. 
Putnam Hill limestone. It is said to be here 4 to 5 feet in thickness. 
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