VIEWS SHOWING THE LAND PEBBLE PHOSPHATE DE¬ 
POSITS, AND THEIR RELATION TO THE BED 
ROCK MARL. 
Fig. 17.—View in pit of the Palmetto Phosphate Company near Tiger Bay, 
showing an inclusion near the base of the phosphate bed (Bone Valley forma¬ 
tion) of a large mass of the bed rock marl (Alum Bluff formation). (1) Sur¬ 
face soil and loose sand. (2) More or less indurated sands of the overburden. 
(3) Workable phosphate bed. (4) Inclusion of the Alum Bluff phosphatie marl 
within the phosphate bed. (5) Bed rock marl. 
Fig. 18.—View in the pit of the Pierce Phosphate Company showing the un¬ 
conformity between the phosphate bed (Bone Valley formation) and the bed 
rock marl (Alum Bluff formation). (1) Workable phosphate bed. (2) Bed 
rock marl. 
Fig. 19.—General view of the pit and plant of the Pierce Phosphate Com¬ 
pany, Pierce, Florida 
90 
