98 THE CLAYS OF ARKANSAS. 
Spadra, and Coal Hill mines. The Spadra shale, with the accompany- 
ing coal, extends westward from Allister about 7 miles into Franklin 
County. The Spadra shale covers all the area within T. 9 N., 
R. 26 W., lying south of the section line between sees. 13 and 24, and 
extends still farther south, to Arkansas River. They likewise include 
sees. 25 and 36, T. 9 N., R. 27 W. Over a large part of this area clay 
shales are associated with the coal, and much of this deposit promises 
to be available for the manufacture of fire-clay products and also for 
sewer pipe and paving brick. 
Both north and south of the area here mentioned, as well as west 
of it, the rocks are higher in the geologic column. They consist, how- 
ever, of shales and sandstones that closely resemble those lower down, 
in the coal-producing rocks. 
The following characteristic section, exposed on the east bluff of 
Arkansas River by the railroad about a mile southeast of the town 
of Ozark, shows the kinds and thickness of most of the rocks of Frank- 
lin County: 
Section near Ozark. 
Feet. 
Sandstone 50 
Shale 90 
Sandstone 15 
Shale 70 
Sandstone 10 
Shale 75 
Sandstone 50 
In the southern part of Franklin County there is a series of rocks 
that stands higher in the geologic column than those included in this 
Ozark section. These higher rocks belong to the group which has been 
called in Arkansas the "Poteau." They cover all of Franklin County 
south of Short Mountain Creek and south of the Vesta coal bank in T. 
8 N., R. 29 W. These higher rocks are likewise exposed over a com- 
paratively small area northeast of Ozark. They form what is called 
the Philpott coal basin, which extends from Moomaw's coal bank east- 
ward (and a little northward) for about 16 miles. These uppermost 
formations include many beds of shale and also the coal beds of the 
upper productive part of the coal-bearing rocks and the fire clays asso- 
ciated with the coal beds. 
CLAY DEPOSITS. 
CLAY SHALES. 
Unfortunately only one analysis has been made of a sample of clay 
from Franklin County, but it seems safe to infer that the analyses of 
the shales of White, Pulaski, Johnson, and Sebastian counties give a 
good idea of the character of the clays and clay shales of Franklin 
County. 
