104 
FLORIDA GEOLOGICAL SURVEY-I4TH ANNUAL REPORT 
Partial Log of the IVell of the Carrabelle Oil and Development Company 2 
(From samples in possession of the U. S. Geological Survey.) 
Depth in feet. 
Sand, light brown . 18- 20 
Sand, dark brown . 49- 50 
Sand, dark brown - 58- 60 
Sand, light yellow, coarse, and fine gravel, with some shell fragments- 65- 67 
Sand, dark brown .....—. 68- 69 
Same, with shell fragments........-. 69- 70 
Limestone, hard, gray ...........—-- 70- 72 
Same, with casts of shells....._______ 78- 84 
Clay, greenish, containing limestones..... 100-110 
Limestone, dark gray, granular_________ 120-125 
Limestone, dark gray .............. 139-141 
Limestone, light gray ._........ 140-144 
Limestone, porous, gray ... 146-149 
Limestone, light gray .H........ 159-160 
Clay, dark gray, shell fragments.----- 194-195 
Same ...- 209-210 
Limestone, light gray, granular.’... 220-222 
Limestone, light gray, porous........ 230-240 
GADSDEN COUNTY 
Gadsden County includes some of the highest land in Florida. With 
respect to structural features, however, this area is probably low, occupy¬ 
ing a syncline. An explanation of the topographic development of this 
part of the State has been given in earlier reports of the Florida Survey.* * 
At the western boundary of this county on the Apalachicola River 
the Chattahoochee formation (Oligocene) lies at the surface. Occasional 
exposures of this formation are found also on the Ocklocknee River in 
the northeastern part of the county. The central part of the county is 
occupied by the Rower Miocene Alum Bluff formation, and in the 
southeastern part of the county the Upper Miocene shell marls come 
into the section. 
The log of a well at Quincy has already been given. (See Quincy 
Area.) 
A deep well was drilled near Greensboro as a test for oil, but unfor¬ 
tunately no samples or other adequate record of the boring is available. 
Drilling was begun in 1917 and continued to a depth of about 1,750 feet. 
The well was cased with six-inch casing to a depth of about 1,300 feet, 
2 Water Supply Paper 319, U. S. G. S., p. 305, 1913. 
*Fla. Geol. Surv., 2nd Ann. Rept., p. 261, 1909. 
