I20 FLORIDA GEOLOGICAL SURVEY I3TH ANNUAL REPORT 



the flatwoods regions described elsewhere in this report; but most 

 of the region is rather hilly, with topography something like that oi 

 the lime-sink region but on a larger scale. The highest known ele- 

 vation in the State is Iron Mountain in Polk County, about 325 feet, 

 and there are probably several other points above 300. though we 



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Fig. 18. Rock Spring, Orange County. The water rushes out audibly 

 from the base of a limestone cliff. about 15 feet high. Feb. 11, 1915. 



