SECOND ANNUAL REPORT—EUEEERS EARTH. 
285 
AMOUNT OF FULLERS EARTH .IN GADSDEN COUNTY. 
The total amount of workable, fullers earth in Gadsden County is 
difficult to estimate. Fullers earth of the average thickness of the 
stratum as found in this section may be assumed to yield as a minimum 
5,000 tons per acre. While the fullers earth actually underlies the 
greater part of the county the workable area under present conditions 
is restricted to the lands lying near the streams or elsewhere where 
the overburden does not exceed ten to fifteen feet in thickness. It is pos¬ 
sibly safe to estimate that 3,456 acres of land, or approximately one per 
cent of the total area of Gadsden County is underlaid by workable 
fullers earth. This area with an average yield of 5,000 tons per acre 
will supply 17,280,000 tons or enough fullers earth to supply the 
demand at the present rate of consumption of this grade for about 500 
years. It is true that much of the fullers earth included in the above 
estimate occurs in sections which are at present remote from rail¬ 
roads or other means of cheap transportation. It is safe to assume, 
however, that transportation facilities will keep pace with the demand. 
It is to be hoped also that the uses for which the American fullers earth 
is adapted may be extended and that the demand will increase. 
LIBERTY COUNTY. 
Liberty County lies between the Ocklocknee and the Apalachicola 
Rivers, south of Gadsden County. It reaches to within about 15 miles 
of the Gulf coast where it joins Franklin County. The northern part 
of the county along the Apalachicola River, in the vicinity of Rock 
Bluff Postoffice, reaches an elevation of from 200 to 250 feet. From 
this part of the county the slope is gradual to the low lands bordering 
the Gulf. With the exception of an increased thickness of superficial 
sands, northern Liberty County is similar both geologically and topo¬ 
graphically to the adjoining parts of Gadsden County. Sections at 
Rock Bluff and at Alum Bluff in Liberty County have already been 
given. Passing south through Liberty County the surface elevation 
falls off gradually until at Bristol the upland region lies not more than 
from 80 to 100 feet above the river, while a few miles beyond Bristol 
the lowlands of the coastal region appear. 
The Chattahoochee limestone passes beneath the river at Rock 
Bluff. On Rock Creek and Sweetwater Creek and its tributaries the 
blue and calcareous sands and fullers earth of the Rock Bluff section 
are exposed. The Miocene marls which come in at Alum Bluff dip 
toward the south and pass beneath the river below Bristol. Although 
exposures are not numerous, these marls underlie the county and re¬ 
appear along the Ocklocknee River on the east boundary. Aside from 
