106 
FLORIDA GEOLOGICAL SURVEY—I4TH ANNUAL REPORT 
fords a contrast to the counties farther south, where the Eocene forma¬ 
tions are exposed. Hamilton County apparently lies in a syncline lying 
north of the structurally high area of Suwannee County. Water wells 
of moderate depth have been drilled in the county, but none of these ex¬ 
ceed 500 feet, and of the wells of this depth no adequate record has been 
obtained. 
HARDEE COUNTY 
The formations found at the surface in Hardee County include the 
Alum Bluff and Bone Valley formations, with probably some later de¬ 
posits. The Alum Bluff formation is found exposed chiefly on the 
streams, being elsewhere very generally covered by the Bone Valley 
formation, which in places is phosphate bearing. Artesian water is ob¬ 
tained in Hardee County from 90 to about 800 feet. 
HERNANDO COUNTY 
Hernando County is on the Gulf coast in west central Florida and ex¬ 
tends east to the Withlacoochee River. It includes in the central part 
of the county some relatively high rolling lands. The Tampa and Alum 
Bluff formations are exposed in the central or highland parts of this 
county, while toward the eastern part of the county, near the With¬ 
lacoochee River, the Eocene comes to the surface. 
During the latter part of 1920 a well was drilled for the Buttgenbach 
Phosphate Company, near Croom, by Mr. J. O. Edson. Through the 
courtesy of Dr. H. G. Bystra, the following notes and general log of 
this well were obtained: 
Log of well drilled for Buttgenbach Phosphate Company, near Croom. Drilled 
1920. Water stands about 42 feet from the surface. Cased to a depth of only 79 feet 
with 12-inch casing. Yields 1,200+ gallons of water per minute. 
Depth in feet. 
Surface sand and clay... 0- 20 
Soft phosphate . 1 . 20- 50 
Gravel and boulder phosphate............. 50- 55 
Hard crystalline limestone ... 55- 65 
Limestone, quite uniform .—....... 65-878 
During the process of drilling, cavities in the limestone were encoun¬ 
tered at 440 feet and at 868 feet. 
