192 FLORIDA GEOLOGICAL SURVEY-I5TH ANNUAL REPORT

terbedded with the marls. Few of these, however, have sufficient thickness and extent to warrant commercial exploitation.
 A brick plant was formerly operated near the Fair Grounds at Kissimmee. The clay is suitable for only a poor grade of common building-brick. The deposit is located on the Atlantic Coast Line Railroad. Its physical properties are:
 Physical Properties of Kissimmee Fair Grounds Clay (Lab. No. o-63).
 Plasticity, judged by feel........... Good.
 W ater of plasticity................. 24.45%
 Pore water ......................... 0.30%
 Shrinkage water .................. 20.15%
 Linear air shrinkage............... 4.70%
 Volume air shrinkage.............. 15.75%
 Modulus of rupture, average........ 271.5 pounds per square inch.
 Slaking test ....................... 1 hour.

 Fire tests:
Temperature. Linear Shr. Absorption. Porosity. Color.
 Per Cent. Per Cent. Per Cent.
 950*C. 0.7 17.57 38.80 Brick red.
 1050 0.3 18.61 40.10 Brick red.
 1150 1.7- 11.92 33.80 Brick red.
 1190 2.3 10.09 30.20 Brick red.
 1230 8.94 25.75 Brick. red.


 PALM BEACH COUNTY
 Palm Beach County is located between Lake Okeechobee and the Atlantic Ocean. Its formations are Pleistocene limestones and sands. No clays of importance are known to be present.


 PASCO COUNTY
 Pasco County is located on the west side of the central portion of the peninsula. The Tampa and Ocala formations compose the surface materials with a very coarse sand-clay of unknown age forming a mantle of variable thickness over much of the county.
 The coarse, sandy clay is reddish to brownish in color and at times has relatively high clay content. It has a thickness of as much as thirty feet or more in the region southwest of Dade City and near San Antonio. 'Some of this material is now being used for molding sand. It is also extensively used in the county for sand-clay road material. It has no value for the manufacture of clay products.