127 
petroleum possibilities oE elqrida 
Depth in feet. 
Brown gumbo . 1720-1750 
Shale and gas . 1750-1765 
Gumbo ..— 1765-1775 
Brown shale ...... 1775-1800 
Gumbo . 1800-1850 
Pyrites . 1850-1853 
Brown shale .-----.... 1853-1863 
Gumbo . 1863-1888 
Following is the log of a well drilled as test for oil near Bruce, Walton County, 
in S. 17, T. 1 S., R. 17 W. Well begun November, 1920. Log furnished by G. P. 
Billups, DeFuniak Springs, Fla.: 
Water sand. 
Blue clay .„. 
Gray sand ... 
Blue shale .. 
Hard lime ... 
Blue clay .. 
Sand (show of oil and gas) 
Hard lime . 
Soft lime ... 
Shell rock ... 
Soft, white lime ... 
Flint rock ... 
Blue clay . 
Hard lime ... 
Shell rock ... 
White sand rock . 
Sand and shell rock .. 
Blue shale . 
Blue clay .,. 
Gray sand rock . 
Soft lime . 
Blue flint ..... 
Blue clay .. 
Hard, gray lime . 
Oil sand, dry . 
Yellow-brown sand rock ... 
White lime rock . 
Blue clay . 
Lime rock . 
Oil sand (good showing).... 
Shell rock and lime mixed. 
White sand ... 
Depth in feet. 
0- 30 
30- 34 
34- 39 
39- 45 
45- 52 
52- 94 
94- 97 
97-108 
. 108-137 
....... 137-160 
. 160-197 
. 197-200 
. 200-221 
. 221-228 
...... 228-251 
. 251-265 
. 265-320 
. 320-337 
. 337-370 
. 370-382 
382-445 
. 445-447 
. 447-480 
. 480-483 
. 483-485 
. 485-510 
...... 510-634 
. 634-655 
. 655-672 
. 672-674 
...... 674-765 
. 765-770 
WASHINGTON COUNTY 
In the northeastern part of Washington County are found occasional 
exposures of the Ocala limestone. According to Cooke, some of the 
limestones found in this county are the Chattahoochee, and not the 
Marianna to which some of the exposures have previously been re- 
