122 FLORIDA GEOLOGICAL SURVEY—I5TH ANNUAL REPORT 
CHAPTER VIII 
DISTRIBUTION AND DESCRIPTION OF DEPOSITS 
BY COUNTIES 
A description of the individual clay deposits with reference to their 
extent, properties and uses was not included in the foregoing account 
of the clay-bearing formations, inasmuch as the various deposits differ 
widely in their characteristics. The fuller’s earth and “sedimentary 
kaolin” each occur in several localities in the State and a more detailed 
account of the occurrence of the latter is given in Chapter IX. 
The various kinds of clay are not confined to any one geographical 
or political unit, but for convenience will be treated here by counties. 
The location of the active clay-working plants (including fuller’s earth) 
is shown on the accompanying outline map (Fig. 2 ). 
ALACHUA COUNTY 
Alachua County is located in the north central part of the peninsula 
and the Alachua, Alum Bluff and Ocala formations occupy the greater 
part of its area. Numerous lacustrine and sink-hole deposits of uncertain 
age are also present, but are limited in extent. Clays are of widespread 
occurrence, but are usually sandy in character. 
Coarse sandy clay suitable for sand-clay road metal is abundant in 
the eastern part of the county in the vicinity of Hawthorne. It ranges 
from five to fourteen feet or more in thickness and is overlain by a loose 
sand and soil overburden ranging from three inches to three feet in 
thickness. 
Clay suitable for drain tile, hollow block, fireproofing and a good 
common brick is found underlying a rather extensive area in the region 
about Campville. Except for the color of the burned clay, which is pink 
at cone 010 and a dirty yellowish brown at cone 9, it would be desirable 
for face brick. 
The Campville Brick Company’s plant, located at about one-half 
mile north of Campville, uses this clay in the manufacture of common 
brick. The plant is located on the Seaboard Air Line Railway (Tampa 
Division), which offers shipping facilities to the principal points in south 
Florida. For a section of this pit see page 114. 
The Campville brick is used to some extent for fire-box and furnace 
linings. It has a good refractoriness and withstands sudden changes 
