EXPLANATION OF PLATE 7. 
Fig. 1. Flint rocks at the surface in the “Pin Hook” section of Jefferson 
County. These rocks as well as the similar limestone and flint rocks of Wakulla 
County are residual. Owing to their resistance to eroding agencies they have 
been left at the surface while the softer rocks have been removed. 
Fig. 2. Wacissa Springs in Jefferson County 
