96 
FLORIDA GEOLOGICAL SURVEY-I4TH ANNUAL REPORT 
Following is a log of a well drilled by the Diamond Ice Company at Alachua:* 
Depth in feet. 
Sand, brown ...A-L : -~— r - .—.■-.. 0- 7 
Clay, soft, brown .;_E........S8g|....1®. 7- 22 
Limestone, soft, white .,...... 22- 80 
Limestone, hard, gray .I..... 80-180 
Limestone, hard, brownish white.^ 180-220 
Limestone, hard, gray, containing layers of blue flint..... 220-270 
The surface materials at this locality to a depth of 22 feet probably 
represent the Alum Bluff formation or material residual from that 
formation. The underlying limestones probably represent the Ocala 
formation (Eocene). From the depth of the well it seems likely that 
formations older than Ocala limestones were reached. 
BAKER COUNTY 
Baker County, in the northeastern part of Florida, adjoining the Geor- 
gia-Florida state line, is one of the counties on which but few geologic 
data are available. The surface is moderately rolling except in the north¬ 
ern part, where the Okefinokee Swamp of Georgia extends into the 
county. The surface exposures in this county include red and yellow 
sandy clays and sands of undetermined age. Miocene and possibly 
some later formations, underlie these surface materials. No deep wells 
have been drilled in this county. The Miocene and Eocene formations 
found exposed farther to the southwest will probably be found dipping 
to the north or northeast and passing under this county. 
BAY COUNTY 
Bay County is on the Gulf coast in West Florida. Miocene shell marls 
lie at the surface in the northern part of this county, and on the gulf 
coast the Upper Miocene probably lies at no great depth. * 1 
Following is the log of a well drilled about two miles across the bay 
from Panama City: 
*From U. S. Geol. Surv., Water Supply Paper 319, 264, 1913. 
1 In the 12th Annual Report of this Survey, p. 120, reference is made to the Alum 
Bluff Miocene being found in a well at Panama City from 30 to 60 feet from the sur¬ 
face. The Choctawhatchee formation (Upper Miocene) was intended and not the 
Alum Bluff formation, which is Lower Miocene. 
