Petroleum possibilities oe Florida 
79 
Depth in feet. 
Light-colored limestone, including considerable silicified rock. Echino¬ 
derm spines and small foraminifera present. 990 
•Light-colored limestone and silicified rock. Small foraminifera very- 
numerous. (A new casing put in showed the actual depth to this level 
to be 1016 feet. The depth-of samples which follow are for the cor¬ 
rected depth) ..1...... 1000 
Light-colored limestone and flint fragments and small foraminifera_ 1050 
Light-colored limestone and pieces of opaque flint. Foraminifera nu¬ 
merous ..... 1100 
Light-colored limestone, including some flint. Small foraminifera_ 1135 
Light-colored limestone, including some flint. Fossils present include 
foraminifera .•. 1150 
Limestone powdered fine. Fossils present include foraminifera.... 1200 
Limestone powdered fine by the drill; small, flat foraminifera present..... 1287 
Limestone powdered fine. Foraminifera present...... 1322 
Light-colored limestone. Small foraminifera present....... 1400 
Light-colored limestone, very finely powdered. No fossils observed. 1450 
Light-colored, rather soft lime rock. No fossils observed....:. 1500 
Light-colored limestone and opaque flint..... 1559 
Light-colored limestone, including a good deal of opaque flint. No fossils 
observed ......... 1576 
Essentially the same as the preceding, including considerable quantity of 
flint. No fossils observed.... 1586 
Light-colored limestone, including some flint. No fossils observed. 1596 
■ Log of Well Below 1,559 as Made Up hy J. A. Cushman, Twelfth Annual Report, 
Page 83 
Depth in feet. 
Similar, but with flinty chips at 1,600 feet, with large rusty iron flakes as 
though casing has been put down at this point or new drilling started 1559-1661 
Light-colored, crystalline limestone, with a few casts of foraminifera 1700-1800 
Similar material, with bluish fragments similar to some seen at 1,450 feet, 
probably from above ....... 1800-1900 
Similar.......... 1900-1922 
Mostly rusted iron flakes from casing.1._ 1922 
Similar to 1900 feet....NR.. 1925-1993 
Hard, compact, crystalline limestone. No foraminifera..... 1995 
No identifiable foraminifera ........ 2000-2100 
Peculiar fibrous, oily material, with light-colored material from above... 2135-2153 
The fossils from these samples have been studied by Cushman, who 
regards the formation below 325 feet as of Lower Cretaceous Age. 1 
Showings of oil were reported in this well. 
GEOLOGIC SUBDIVISIONS IN PENINSULAR FLORIDA 
LIVE OAK AREA 
Investigations made by the United States Geological Survey in co¬ 
operation with the Florida Geological Survey indicate a more or less 
1 Fla. Geol. Surv., 12th Ann. Rept., p. 82, 1919. 
