PETROLEUM POSSIBILITIES OE ELORIDA 
99 
Samples from Calhoun Gas and Oil Company. About half a mile northwest 
Clarksville. Elevation of well estimated at 143 feet. Well begun October 15, 1919; 
completed to 1,320 feet October, 1920. Samples collected by W. A. Edwards, driller. 
Depth from surface. 
Iron-stained sand, some clay....... 10 
Sand, some clay ... 20 
Drab-colored, micaceous sands...*.. 30 
Sand ............. 40 
Highly micaceous, clayey blue sand. 50- 60- 70 
Sand, shells (pecten), coral, etc.. 80- 90- 100 
Sand, shell fragments .. 110 
Sand, many shells .... 120 
Micaceous sand with shell fragments.... 140 
Sand and shells ..... 130- 160 
Sand, sandy clay and shells.............i. 180 
Light-colored limestone .,... 200- 220 
Light-colored limestone, some small shells.2^. 240- 260 
Light-colored, soft limestone or marl, with some clay. 280 
Light-colored, clayey marl or limestone. 300 
Same, together with sandy rock with greenish cast. 310 
Sandy limestone with greenish cast and some light marl. 368- 380- 400- 420 
Same, together with light-colored, porous limestone...440 
Light-colored, porous limestone, many foraminifera. 450- 555 
White limestone, more large, flat foraminifera and other 
fossils ..HI.w. 560 
Soft, porous, white limestone, with fossils... 565- 570 
Similar rock, with many foraminifera.. 575- 610 
Soft, white limestone ... 620- 660 
Medium hard, white limestone... 670 
Soft, white limestone ..2. 680- 730 
Soft, white limestone or marl. 740- 750 
Interval 750 to 900. No samples. Driller W. A. Edwards 
says all white, soft rock, returns milky. 
Drab-colored, very calcareous clay or marl, little or no sand. 
Disintegrates in water . 915 
Soft, gray white marl or limestone. 945- 960 
Soft, white, granular limestone..-. . 975 
Soft, white, granular limestone, some sand. 995-1000 
Chiefly coarse sand, some limestone and some glauconite. 1005 
Coarse, calcareous, glauconitic sand. 1010-1015 
Sandy limestone or calcareous sandstone, with glauconite. 1020-1030 
Limestone, slightly yellow, many foraminifera.... • 1040 
Soft, white limestone, with foraminifera. 1050-1060 
Limestone, with foraminifera and sand. 1070 
Fine, calcareous sand, gray or light. 1080 
Light, calcareous sand or sandy limestone, more porous. 1100-1110 
Very calcareous, fine sand, many foraminifera. 1120 
Very calcareous, fine sand......„„|||... 1130 
Very sandy, light-colored limestone or marl. 1140 
Light-colored limestone, some sand, some foraminifera.. 1150 
Very calcareous, light-colored sand, some mica.. 1160-1170 
Very calcareous, light sand, some foraminifera. 1180-1200 
Limestone and sand, many foraminifera, some glauconite. 1210-1220-1230 
Very calcareous sand or sandy limestone.... 1240 
Coarse, calcareous sand, with glauconite. 1250 
Green-colored, calcareous and glauconitic sand.. 1260 
