NEVADA COUNTY. 137 
one-sixteenth after burning. The output of the plant is 20,000 bricks 
a day. 
Steven briclc plant. — No data have been obtained concerning the 
brick plant of Anthony W. Stevens, located in Texarkana. 
Interstate Pottery Company. — The plant of the Interstate Pottery 
Company is located at Texarkana. The clay used is the Eocene 
(Tertiary) clay similar to that used near Benton by the Eagle Pottery 
Company. Jugs, churns, and jars are made. 
MISSISSIPPI COUNTY. 
Mississippi County occupies the northeastern corner of the State 
and is bordered by Mississippi River. The entire county is low and 
is subject to overflow by the river. The lowest lands are covered 
with water throughout the year. There are many large lakes in the 
southern, western, and northern portions of the county. Some of 
these lakes, such as Big Lake and Tyronza, are several square miles 
in extent. Levees along the entire Mississippi front are necessary to 
keep out the flood waters in the spring of the year. The highest land 
in the county is along Mississippi River, which by repeated overflows 
has deposited its greatest load on lands nearest the main channel. 
The westward slope of the country is shown by the fact that many 
small streams head near Mississippi River and flow westward and 
drain into Tyronza River and Pemiscot Bayou. 
Much of the surface of the county is composed of alluvial deposits 
of silt, sand, and finely divided clay. In places, however, beneath 
the alluvial sand there is a yellow clay loam which greatly resembles 
the yellow clay loam of the prairies west of Crowleys Ridge and the 
narrow strip of clay land on the east side of the ridge. In a few 
places the yellow loam forms the surface soil. 
At some distance back from the streams and abandoned water 
courses the country becomes flatter and is now largely covered with 
water for several months in the year. This land in the interstream 
areas is a gray buckshotty clay land, covered with a dense growth 
of sycamore, gum, and cottonwood, with more or less maple, willow, 
oak, hickory, black oak, elm, and ash. In the buckshotty clay area 
there are no signs of old stream channels. 
At Blytheville there is a brick and tile works plant which makes a 
common brick from the yellow surface clay loam. The buckshot 
clay could likewise be tempered with sand and utilized for making 
common brick. 
NEVADA COUNTY. 
The geology of Nevada County is like that of Dallas and Ouachita 
counties, to the east and north, like that of southern Hempstead 
County, to the west, and like that of Columbia County, to the south. 
