LEE COUNTY. 127 
The country between Marianna and the Lonoke County line is a 
rolling plain cut into north-south ridges, with low, wooded depres- 
sions. The surface of many of these low ridges is a clay loam similar 
to the surface material on the terrace adjacent to Crowleys Ridge. 
CLAY DEPOSITS. 
Only one analysis has been made of the surface clays of Lee County, 
the sample being a reworked product of loess found at the foot of 
Crowleys Ridge at Marianna. The bricks made from this clay are 
of a deep-red color, and form a good, strong building brick. 
Analysis of reworked loess soil from near Marianna, in sec. 24, T. 2 N., R. 3 E. 
[Dried at 110°-115° C. R. N. Brackett, analyst.] 
Silica (Si0 2 ) 75. 40 
Alumina (A1 2 3 ) 10. 29 
Ferric oxide (Fe 2 3 ). 7. 07 
Lime (CaO) 1. 00 
Magnesia (MgO) 1. 36 
Potash (K 2 0) 74 
Soda (Na 2 0) 82 
Phosphoric acid (P 2 5 ) 30 
Loss on ignition 3.18 
100. 22 
Air-dried sand 72. 40 
This material is of chocolate-brown color and fills the bottoms and 
ravines of the region east of Marianna. It seems to be a rearranged 
and highly ferruginous variety of loess, agreeing with ordinary loess 
in all other particulars. 
CLAY INDUSTRY. 
A plant for the manufacture of common building brick was estab- 
lished in Marianna about 1890. It is at present run by O. C. Sutton 
& Co. The bricks are made from the red surface clay. The clay is 
tempered and molded in a steam machine having a capacity of 25,000 
to 30,000 bricks a day. The bricks are dried by the rack and pallet 
system, in covered sheds. It requires about seven days to dry the 
bricks sufficiently for setting in the kilns. Wood is the fuel and the 
bricks are burned about nine days. Three up-draft clamp kilns are 
used. About half a cord of wood is consumed in burning a thousand 
bricks. The size of the bricks is 8 f by 4 J by 2 J. 
