AGE OF THE UNDERLYING ROCKS OF FLORIDA 
93 
a bed largely made up of thick Nummulites and of Upper Eocene 
age. From 550 feet to 770 feet the Comanchean Lower Creta¬ 
ceous is clearly indicated, the upper part of which and perhaps all 
belongs to the Fredericksburg Series. 
CITY WELL AT FORT MYERS, LEE COUNTY, FLORIDA. 
Depth of well 950 feet. Size 10 and 8 inches; casing 10 inches, 
14 feet; 8 inches, 203 feet; principal water supply 875 feet. 
A description of the samples from this well has been published 
(Florida Geological Survey, Seventh Annual Report, 1915, pp. 
51.52). 
0-200 feet. 
200-250 feet. 
280-680 feet. 
720-760 feet. 
800 feet. 
880 feet. 
900 feet. 
950 feet. 
No samples. 
No foraminifera. 
Few foraminifera at various levels. 
Numerous casts of Miliolidae including Peneroplis. 
Numerous casts of Miliolidae but without Peneroplis. 
Numerous casts of Polystomella. 
Similar to 720 feet. May have come originally from that level. 
Numerous casts of RotUliidae. 
PROBABLE STRATIGRAPHY. 
The foraminifera as a whole are very unsatisfactory, repre¬ 
sented by rare., poorly preserved specimens in the upper, levels and 
by internal casts in the lower ones. The latter are identifiable only 
to the genus at best. 
The series from 280 to 680 feet may be referred to the Mio¬ 
cene, probably the lower Miocene, suggesting somewhat generally 
the Chipola, allowing for the difference in ecological conditions 
between the two widely separated areas. The series from 720-950 
feet represent very shallow water conditions both from the genera 
of the foraminifera and the lithological character of the samples. 
At 900 feet considerable quartz sand is present. With such ma¬ 
terial and the geographical distance between these and the known 
surface deposits nothing more than a guess can be made. On this 
basis alone it is suggested that some of it may represent the Tampa 
formation of the Upper Oligocene. 
There is an absence of any specimens or fragments of Lepido- 
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