A PRELIMINARY report on clays oe elorida 
213 
This is a flood-plain deposit having a thickness of more than ten 
feet and a two-foot overburden of sand. The Louisville and Nashville 
Railroad, at Argyle, is the nearest shipping point. 
The clay is red-burning and is suitable for a good grade of struc¬ 
tural materials. Its physical properties are: 
Physical Properties of Edwards Clay, Argyle (Lab. No. 0 - 80 ). 
Plasticity, judged by feel... 
Water of plasticity... 
Pore water .. 
Shrinkage water .. 
Linear air shrinkage....... 
Volume air shrinkage.. 
Modulus of rupture, average 
Steel hard at cone 1. 
Excellent. 
26.40% 
1 . 01 % 
25.39% 
8 . 00 % 
27.80% 
349.7 pounds per square inch. 
Fire tests: 
T emperature. 
Linear Shr. 
Per Cent. 
A bsorption. 
Per Cent. 
Porosity. 
Per Cent. 
Color. 
950°C. 
0.3 
20.29 
34.35 
Brick red. 
1050 
1.0 
20.77 
36.85 
Brick red. 
1150 
1.8 
11.11 
24.75 
Brick red. 
1190 
7.0 
9.00 
21.40 
Brick red. 
1230 
7.0 
8.67 
21.65 
Brick red. 
1310 
7.0 
8.21 
21.86 
Brick red. 
1370 
7.0 
6.29 
18.60 
Brick red. 
1430 
9.0 
0.65 
8.45 
Brick red. 
A sandy surface-clay occurs on the property of Perry L. Biddle, 
one mile south of DeFuniak Springs. It burns to a friable and porous 
red-colored product and therefore is suitable only for a common brick of 
inferior quality. 
A white, sandy, micaceous clay, containing some course quartz, 
occurs on the property of G. P. Billups in Sec. 26, T. 2 N., R. 19 W., 
five miles south of DeFuniak Springs on the Freeport road. The sand, 
mica and gravel content of this clay renders it useless for manufac¬ 
turing purposes in its present form. It is probable that the clay would 
be of some value when washed. The nearest shipping point is De¬ 
Funiak Springs. 
A black plastic clay occurs on the property of R. W. Thompson, 
one mile north of DeFuniak Springs. This stratum is ten feet in thick¬ 
ness and is overlain by twenty feet of sand. Sand also underlies the 
clay strata. This is a white-burning clay. Its exceedingly heavy over¬ 
burden probably prevents it from having any commercial value at the 
present time. 
