144 
FLORIDA STATE GEOLOGICAL SURVEY. 
relatively water tight, flows might still be obtained, in some 
instances, from water conducted through the cavities in the lime¬ 
stone. Such possible conditions are illustrated by the accompany¬ 
ing sketch, also taken from Mr. Fuller’s paper.* Several other 
possible structural conditions that may give rise to artesian flows 
are described and illustrated in the paper referred to. Those 
illustrated above, however, include the structural conditions which 
seem likely to prevail in Florida. 
Fig. 4.—Sketch illustrating artesian flow obtained from solution pass¬ 
ages in the limestone. After Fuller. 
SOURCE OF ARTESIAN WATER OF FLORIDA. 
The idea is rather prevalent that the artesian waters of Florida 
are in no sense local but are derived from the Appalachian 
Mountains, or some other remote inland point. This is an error, 
which, if not corrected, may prove detrimental. That the supply 
is local is evidenced by the fact that the artesian wells of the 
State are affected by local rains. Many of the well owners have 
recognized the effect of local rains on their wells; others who 
have observed less closely recognize no such variation. That the 
rainfall is sufficient to supply the large quantities obtained has 
already been demonstrated. 
FORMATIONS SUPPLYING THE ARTESIAN WATER OF 
EASTERN AND SOUTHERN FLORIDA. 
As explained in the chapter on Geology, the principal artesian 
reservoir of the eastern and southern part of Florida is the Vicks- 
*U. S. Geological Survey, Bull. 319, p. 39, 1908. Summary of the 
Controlling Factors of Artesian Flows. 
