GEOLOGY BETWEEN APALACHICOLA AND OCKLOCKNEE RIVERS. 35 
Fig. 3. Elevations and contours on the top surface of the Chattahoochee formation. The elevations followed by the 
“plus-minus” sign are inferred levels. With one exception, they have been obtained by deducting from the known level of the 
fullers earth horizon 70 feet, that being the approximate interval between that horizon and the top of the Chattahoochee for- 
mation. 
