ILLUSTRATIONS. 
PLATES. 
Pi, ate. Facing Page. 
I. Alum Bluff on Apalachicola River, Florida.Frontispiece 
II. Fig. 1. Sink hole, southeast of Vernon. Type of topography 
of Vicksburg group. 58 
Fig. 2. “Falling Water,” five miles south of Chipley. 58 
III. Fig. 1. Ocala limestone. Quarry of Ocala Lime Company. 64 
Fig. 2. Ocala limestone ledge in pit of Fort White Hard 
Rock Phosphate Company, Fort White.... 64 
IV. Fig. 1. Outcrop of Hawthorne limestone op Suwanee River 
opposite Ellaville . 74 
Fig. 2. Limestone of Tampa formation, Hillsboro County. 74 
V. Fig. 1. Cut on the G. S. and F. R. R., near Kent, Nassau 
County . 100 
Fig. 2. Alum Bluff formation, near White Springs on Su¬ 
wanee River ..... ... 100 
VI. Fig. 1. Land pebbly phosphate, showing bedded deposit.... 140 
Fig. 2. Pleistocene terrace, St. Marys River. 140 
VII. Fig. 1. Conglomerate of Lafayette formation, Rock Hill.. 154 
Fig. 2. Coquina rock, Anastasia Island, St. Augustine. 154 
VIII. Fig. 1. “Rise” of the Santa Fe River. 160 
Fig. 2. Ancient shell mound, Indian River... 160 
IX. Fig. 1. Quarry in Miami oolite, Keys Station, Dade Count} 212 
Fig. 2. Reef rock overlain by marl, Knights Key. 212 
X. Fig. 1. Erosion by spray in Key Largo limestone, Knights 
Key . .... 218 
Fig. . 2 . Beach ridge of calcareous sand, Cape Sable.. 218 
XI. Hard rock phosphate mining region. . 236 
XII. Land and River pebble phosphate mining region. 238 
XIII. Fig. 1. Plate rock phosphate mining, Anthony, Marion 
County .. 240 
Fig. 2. Removing overburden, land pebble phosphate, Mul¬ 
berry .. ... 240 
XIV. Fig. 1. Plastic Kaolin mine, Edgar, Putnam County. .. 244 
Fig. 2. Dredge excavating peat, North Canal, near Fort 
Lauderdale. Photo by Matson. 244 
XV. Fig. 1-6. Sands for mortar . 248 
XVI. Fig. 1. Fullers earth plant at Ellenton, Manatee County... 258 
Fig. 2. Fullers earth plant at Quincy, Gadsden County... 258 
XVII. Fig. 1. Apalachicola River looking south from Alum Bluff. 236 
Fig. 2. Exposure of Chattahoochee limestone on A. C. L. 
R. R. River Junction. 266 
XVIII. Map of fullers earth exposures in Gadsden and Liberty 
Counties . 281 
XIX. Fig. 1. View in pit of Owl Commercial Company, Quincy. 284 
Fig. 2. View in pit of Owl Commercial Company, Quincy. 284 
TEXT FIGURES. Page. 
Fig, 1. Map showing sink holes. 33 
Fig. 2. Solution channel in limestone. 36 
Fig. 3. Section along drainage canal. 193 
Fig. 4. Section at Chattahoochee Landing. 268 
Fig. 5. Section at Aspalaga Bluff. 272 
MAP. 
Topographic and Geologic Map of Florida. In pocket 
