TABLE 4. Geologic formations and their water-bearing characteristics in Green Swamp area and vicinity.


 System Series


 Recent
Quaternary


Pliocene


 Pleistocene



 Upper


Miocene Middle



 Lower


 Oligocene


Eocene


Upper


Middle


 Formation
 (after F.G.S.)


 Recent
 Deposits


 Terrace
 Sands


 Citronelle
 Formation


 Fort Preston
 Formation (7)


 Hawthorn
 Formation


 Tampa
 Formation


 Suwannee
 Limestone

 Crystal
 River
 Formation

0 Williston
g Formation

 S Inglis
 Formation


 Formations
 used in this
 report







Undifferentiated
 Clastic
 Deposits


Undifferentiated
 Clay




 Suwannee
 Limestone


 Crystal River
 Formation


 Williston
 Formation


 Inglis
 Formation


Avon Park Avon Park
Limestone Limestone


Approximate
 range of
 thickness
 (feet)







 0-200


0- 60


0- 80


0-120


0- 40


0- 50


800-1,000


 Lithology





Light-colored clayey
 sands grading
 into sandy clays


Dark-colored phos-
 phatic clay with
 limestone lenses



 Hard, white-yellow
 limestone


 Soft, gray,
 limestone


 Hard, tan
 limestone


 Hard, tan
 limestone

 Soft to hard,
 white-brown,
 dolomitic lime-
 stone


 Water-bearing
Aquifer characteristics


Non-
 artesian


Secondary
 artesian


Floridan


Generally poor source in the cen-
 tral part of the area. A fair
 source in the ridge areas.


Generally very poor except in
 the Lakeland area where iriter-
 bedded limestones are a fair
 source.


Generally good to excellent. The
 best source is the dolomitic
 Avon Park Limestone. Evapo-
 rite (selenite) deposits near
 the base of the Avon Park
 Limestone is considered to be
 the base of the aquifer.


Tertiary


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