COAL MINES OF VINTON COUNTY. 1005 
_ The close agreement in the structure of the seam at Zaleski with 
its structure in the Hocking Valley field is apparent. Here, as in the 
last-named field, the seam is made of 3 benches. The slates have the 
same thickness and character, and the same layer of poor coal is found 
directly above the second slate as in the Hocking Valley. In fact, the 
whole of the upper bench is generally rejected, as it is to the eastward 
of the Hocking Valley. 
The bottom bench varies in thickness, ranging from 6 to 14 inches. 
In some parts of the company’s lands, the coal shows somewhat different 
proportions, as at the Coalmont Works, now abandoned. The structure 
at this point is shown herewith : 
FIGURE XxX 
SECTION OF COALAT BUNG HOLE MINE, 
Sandstowe...___. 
Ce SR aati d nian bolton 
Goto a ta sg 
RosUneies «Le Akee i 2 | 9 
(Se oes OANA 
Vartand._ ieee 
The coal mines in medium-sized blocks, and is of fair quality. It 
is used mainly for steam production on the line of the C. W. and B. 
R’y. A large acreage still remains to the company. 
One peculiar fact in connection with this seam may be noted here. 
In the Report of Progress for 1870, page 78, Professor Andrews gives 
an account of a quartzite boulder, found partly imbedded in the Zaleski 
coal. The boulder was worn and smoothed by friction before it came 
into the coal. It ncw appears that such boulders are not infrequently 
met in and immediately above the coal. The bank boss, Thomas Wat- 
kins, informs me that he has ina few cases found a number together, 
sometimes 8 or 10 in the coal, and that single ones are often found. 
One of these, presented to the Survey, proves to be like the one de- 
scribed by Professor Andrews, a gray quartzite, compact and firm, and 
well polished externally, as if by glacial action. Some of them are 
