ADMINISTRATIVE REPORT 
13 
one volume relating to this subject. The reports so far published have 
served a very useful purpose and are a foundation for a solution of 
some of the forest problems of Florida and determining soil possibilities 
by means of vegetation. The Geological Survey has been active in dis¬ 
seminating information in regard to oUr native vegetation and has co¬ 
operated with those agencies in the state that are fostering the interests 
of a conservation of these resources. 
LIMESTONES 
Florida is a state having vast deposits of limestone. These are found 
exposed at the surface.in many of our counties from the extreme south¬ 
ern end of the peninsula to western Florida. These deposits are not 
only of scientific interest but of great economic importance. Much is 
known of these deposits; but, as yet, no detailed report has been made. 
It is the purpose of the Survey to take up the study of these deposits, 
primarily economic, in the near future. With this study will also be 
included that of possible cement resources. Some deposits of limestone 
in the state, the Chattahoochee limestone typically exposed along the 
river of that name in western Gadsden County, were formerly used in 
the manufacture of natural cement. 
SANDS 
An investigation of the sands in a state in which they are so univer¬ 
sally present as in Florida may at first thought seem inconsistent with 
good judgment. Such, however, is not the case, and this is a resource 
that merits careful investigation. Throughout the state are found de¬ 
posits of pure white, siliceous sands that are, no doubt, adapted to the 
manufacture of various grades of glass. Sands used for building pur¬ 
poses are more widely distributed, and at certain localities are found 
excellent deposits of coarser sands and gravel that are particularly good 
in concrete work. From certain sands along our coast the rare earths, 
including ilmenite, zircon and rutile, are recovered. The possibility of 
locating deposits of moulding sands should not be overlooked. Sands 
and gravels of particularly good grade are being dredged from the Apa¬ 
lachicola River. These are used in concrete work of all descriptions. It 
was this material that was used as the aggregate in the concrete bridge 
now spanning the Apalachicola River. 
