PHOSPHATE DEPOSITS OF THE SOUTHERN STATES. 



93 



phates of this state are found in both the Cretaceous and the Ter- 

 tiary formations. The Cretaceous strata, extencHng into Missis- 

 sippi, contain more or less phosphatic material.* 



9 



GEORGIA. 



The phosphates of Georgia are found in the Coastal Plain de- 

 posits and, although of low grade, are widely distributed.! 



Fig. 22. — Removing overburden fi-om phosphate rock in Florida by hydranl- 

 icking. The overburden as seen in this view, presents the usual condition, 

 consisting of three or four feet of loose light colored sand beneath which is 

 found several feet of clayey and sandy material. The bank is knocked to 

 pieces by the stream of water and after being washed into the sump hole, is 

 pumped to the waste dump. The phosphate stratum which lies beneath is 

 subsequently removed in the same way, being pumped through pipe lines to the 

 washer plant. The phosphate washer and also the waste dump are seen in 

 the background. From this view may be seen also type of country in which the 

 land pebble phosphates of Florida are found. The land is level, or but slightly 

 rolling. The native timber growth, chiefly long-leaf pine, is now largely re- 

 moved. 



*The Phosphates and Marls of Alabama, by Eugene A. Smith, Geological 

 Survey of Alabama. Report on the Coastal Plain of Alabama, pp. 449-525, 1895; 

 and Amer. Inst. Min. Engrs. Trans, xxv, pp. 811-822, 1896. 



tA Preliminary Report on a Part of the Phosphates and Marls of Georgia, 

 by S. W. McCallie, Geol. Surv. of Georgia, Bulletin No. 5-A. 1896. 



