JACKSON COUNTY. 117 
CLAY INDUSTRY. 
Clark Pressed Brick Company, Malvern. — The plant of the Clark 
Pressed Brick Company is located near the main track of the St. 
Louis, Iron Mountain and Southern Railway, on the south side of 
the town of Malvern. The bricks when burned are loaded directly 
from the kilns into cars. 
The clay used for making the brick is obtained from the second- 
bottom hummock of Ouachita River, about three-fourths of a mile 
from the kilns. A steam shovel is used in the pit for digging 
the clay, which is loaded into small cars. The cars are drawn to the 
kiln on a steel-railed tramroad by means of a small locomotive. 
Through the summer and fall the common stiff-mud bricks are 
made, and dry-pressed brick during the winter. The clay is high in 
silica, burns to a deep Indian red color, and makes a durable, tough 
brick. 
The bricks are made in an end-cut machine and dried in an arti- 
ficial drier. The green bricks are then placed in large 250,000 up-draft 
kilns. It requires seven days for burning a kiln, using 110 tons of 
coal. 
The plant has a capacity of 75,000 bricks a day. Forty-eight men 
are employed; two men in the pit, one man to run locomotive, six 
men in setting dried bricks in the kilns, and the remainder in feed- 
ing pug mill, carting green bricks away to drier and, when dried, to 
the kilns, running machinery, loading burned bricks, and firing 
kilns. 
Malvern brick and tile wor'ks. — This plant manufactures white 
front, paving, and fire bricks. The white plastic clay, which is doubt- 
less of lower Tertiary age, is used. The bricks are made in a stiff- 
mud machine and dried with artificial heat. The bricks are burned 
in round down-draft kilns. 
JACKSON COUNTY. 
The greater part of Jackson County lies east of White River and 
its principal tributary, Black River. These two rivers in this county 
practically mark the eastern border of the old Paleozoic rocks. The 
greater portion of the county is therefore in lowlands of Quaternary 
age. Two townships that lie directly south of Independence County 
are mostly in the Paleozoic area. A narrow ridge west of Depart 
Creek in T. 10 N., R. 4 W., contains limestone and marl bearing a 
fauna that belongs to the midway stage of the Tertiary. The Ter- 
tiary is recognized in but one place north of this, namely at Newark, 
where a bed of greensand marls has been found containing shark's 
teeth and some unrecognizable invertebrate fossils. 
The surface of the lowland is similar to that of most of the coun- 
ties in the Quaternary of this section of the State. Near the streams 
