POPE COUNTY. 159 
Material suitable for brickmaking covers a large area around At- 
kins, extending from W. H. Murphy's old brickyard at the base of 
Carrion Crow Mountain, in the SW. | SE. | sec. 20, T. 7 N., II. 18 W., 
eastward over several sections. This material varies much in depth, 
while at some places its continuity is broken by small gravel ridges. 
On the line between the SW. J.NW. i sec. 4* and the SE. J NE. \ 
sec. 5, T. 7 N., R. 18 W., and over the greater portion of these lots, 
there is a fine light-colored clay about 4 feet thick. It is almost 
white in color, although there are spots of brown here and there 
toward the eastern side of the area. 
Analysis of clay from sec. 5, T. 7 X.. R. 18 W. 
[Brackett <V Smith, analysts.] 
Silica (Si0 2 ) 90. 49 
Alumina ( A1 2 3 ) 5. 22 
Ferric oxide (Fe 2 3 ) 1. 38 
Lime (CaO) 1 
Magnesia (MgO) 
Potash (K 2 0) 
Soda (Na,6) I 
Loss on ignition 3.12 
100. 21 
Fine sand specimen 30. 53 
Water at 110°-115° C 1. 60 
In the NE. \ SE. \ sec. 26, T. 7 N., R. 19 W., there is an area of 
about 10 acres containing a soft brown and blue argillaceous shale, 
showing an exposure of 2 feet in the side of a creek. These shales 
are very soft and can readily be worked into a clay for the manu- 
facture of fire-clay goods. 
The clays around Russellville vary in color from a yellowish brown 
to an ashen white, according to the position of the material in the 
bed. In general the surface clay is darker than the underlying 
material. This difference in color varies in different places. In sees. 
8 and 9, T. 7 N., R. 20 W., the upper clay is yellowish brown and 
varies in depth from 1 foot on the southern side of these sections to 
3 feet along the bank of the creek that flows northeastward past 
Russellville. The lower division of this clay as exposed in the bank 
of the creek is pale yellow, almost white, and contains a great quan- 
tity of nodules of iron. 
This buckshot clay rests immediately on the dark-blue argilla- 
ceous shales of the coal-bearing rocks and varies in thickness from 1 
foot to 5 or 6 feet. On the slight ridge immediately south of Russell- 
ville, in the NW. \ sec. 9, it is not more than 1 foot thick, but in the 
land along the creek and between the Little Rock and Fort Smith 
Railway and the Dardanelle Railway it shows a thickness o[ (> feet. 
