PEBBLE PHOSPHATE DEPOSITS. 
51 
540 feet. Light colored limestone with small, flat echinoderms. 
560 to 680 feet, samples at twenty-foot intervals. Light to brownish colored 
limestones. 
800 feet. Light colored granular limestone. 
Description of samples from the city well, Ft. Myers, Florida, drilled 1914, 
driller Ohio Wjell Drilling Company, Jacksonville, Florida. Size 10 and 8 inches ; 
casing 10-inch, 14 feet; 8-inch, 203 feet; principal water supply 875 feet; flowing 
yields 650 gallons per minute, depth 950 feet; in charge of drilling, G. P. Peppard. 
Depth of sample from the surface. 
200 feet. Light colored limestone with fragments of fossils, also some sand 
and dark, shiny phosphate pebble. Fossils include bryozoa, broken shell 
fragments, etc. 
210 feet. Much the same rock. Shark’s tooth, some phosphate pebble, broken 
shells, some echinoderm spines and many bryozoa. 
220 feet. Similar light colored limestone. Some fine black phosphate pebble 
imbedded in the rock. 
230 feet. Similar light colored limestone. 
280 feet. Similar light limestone consisting of broken shell fragments together 
with fragments of rock containing minute black phosphate pebble. 
300 feet. Similar light colored limestone consisting of broken fragments of dif¬ 
ferent shells together with some pieces of hard, dark colored rock. 
320 feet. Similar light colored limestone consisting of shell fragments. 
360 feet. A similar light colored limestone containing also small shiny black 
phosphate pebbles. 
340 feet. Similar light colored limestone with an abundance of small shiny 
black phosphate pebbles. 
380 feet. Similar light colored limestone consisting of a mass of broken shell 
fragments, rather more finely broken up than the preceding. Phosphate 
pebbles somewhat less abundant than in last sample. 
400 feet. Similar light colored limestone consisting of a mass of shell fragments 
broken up finely. 
420 feet. Similar light colored limestone, some phosphate pebble as in preceding. 
440 feet. Similar light colored limestone, including phosphate pebble, also one 
small oyster shell. 
460 feet. Similar light colored limestone, although not so finely broken up and 
including pieces of rock with the small phosphate pebbles imbedded. 
480 feet. Buff calcareous clay, some phosphate pebble and some shell fragments. 
500 feet. Light colored limestone consisting of shell fragments with an abun¬ 
dance of black phosphate pebble and with small fragments of the sandy 
marl with slightly green shade of color. 
