116 Florida geological survey— 14TH annual report 
cene shell marls underlie the Kissimmee Valley. Record of a deep well 
at Okeechobee has already been given under the discussion of the Kis¬ 
simmee Area. 
ORANGE COUNTY 
Orange County lies chiefly within the lake region of Florida, and 
much of the surface material, including sands and sandy clays, are of 
undetermined age. However, near the west line of the county, at Rock 
Springs, deposits of Miocene age are exposed. 1 In the eastern and 
southern parts of the county the formation at the surface may be as late 
as the Pliocene or Pleistocene. Fossiliferous exposures of this age, 
however, are not known in the cou'nty. 
Wells drilled at Orlando, in the central part of the county, indicate 
that limestones probably, although not certainly, Eocene in age, are 
reached at between 150 and ~250 feet from the surface. 
OSCEOLA COUNTY 
The surface in Osceola County is prevailingly level or but slightly 
rolling. Such limited exposures as are to be seen consist largely of 
residual or more or less leached material, lacking fossils, and of unde¬ 
termined age. From well records, however, it is known that a consider¬ 
able thickness of Pleistocene is found in the Kissimmee Valley, and it 
is probable, from the distribution of formations elsewhere, that the east¬ 
ern part of the county includes either Pleistocene or Pliocene formations. 
In 1914 the Kissimmee Oil Company began drilling a test well for oil 
on the McCool farm on Lake Tohopekaliga, Section 25, T. 26 S., R. 
29 E. This well was drilled 2,000 feet or deeper. The following is a log 
of this well, based on samples of the drillings: 
Record of well of the Kissimmee Oil Company, located about 8 miles south of 
Kissimmee on the McCool farm, bordering Lake Tohopekaliga, Section 25, Township 
26 S., Range 29 E. Samples from the surface to the depth of 1,872 feet submitted 
March 21, 1921, to the Geological Survey by Bartlett G. Long, Consulting Geologist. 
Six samples, representing the drillings from 1,865 feet to 2,000 feet, were submitted 
June 6, 1917, by Mr. G. F. Kribbs, Kissimmee, Fla. Drilling began in 1914; well 
abandoned in August, 1917. 
Depth from surface. 
(Ft.). 
Fine, dark gray, surficial sands.i... 0- 5 
Very fine, brownish sand, with small amount of clayey material.. 60 
1 Smith, E. A., Amer. Journ. Sci., 3rd Ser., Vol. 21, pp. 302-303, 1881. 
