152 FLORIDA GEOLOGICAL SURVEY-I5TH ANNUAL REPORT 
Fig. 22. —General View of Barrineau Bros. Brick Plant, Quintette, 
Escambia County. 
black color is due to the presence of organic matter which is completely 
burned off, leaving it a light-cream color at cone 010. Its physical prop¬ 
erties are: 
Physical Properties of Dexland No. 6 (Lab. No. 0-25). 
Plasticity, judged by feel. Excellent. 
Water of plasticity. 26.90% 
Pore water. 0.40% 
Shrinkage water. 26.42% 
Linear air shrinkage. 10.8 % 
Volume air shrinkage. 31.0 % 
Modulus of rupture, average. 1021.1 pounds per square inch. 
Slaking test. 24 hours. 
Steel hard at cone 010. 
Fire tests: 
T emperature. 
Linear Shr. 
Per Cent. 
A bsorption. 
Per Cent. 
Porosity. 
Per Cent. 
Color. 
950°C. 
0.8 
16.22 
40.50 
Cream. 
1050 
2.2 
16.56 
31.75 
Cream. 
1150 
2.2 
12.80 
27.50 
Cream. 
1190 
3.2 
7.82 
17.50 
Gray. 
1230 
3.2 
7.95 
17.80 
Gray. 
1310 
3.2 
6.84 
16.90 
Gray. 
1370 
4.2 
4.72 
12.95 
Gray. 
1430 
7.7 
3.62 
10.20 
Gray. 
Clays having properties similar to the Dexland and Escambia Bay 
clays are also found farther westward in the valley of the Perdido River. 
A reddish-pink, very smooth-textured, highly plastic clay occurs 
about three miles east of Muscogee in a cut on the Gulf, Florida and 
Alabama Railroad. The clay is cross-bedded and dips slightly to the 
westward. There are several strata alternating with thin beds of sand. 
