Near the sink, the undifferentiated sands overlie the Chattahoochee Formation. North of the sink, they overlie the Alum Bluff Group, and extend to the top of Falling Water Hill, a total thickness of about 60 feet.
SJNDIFFEREN
'W CHATTAHOOCHEE ,-:' ,..'. -! 1 [ ,! FORMATION
Geloicmeia, i ,alin Wate S-.ink showin rock doste during the
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Gokc sio In iln Wae Sin shwn rok deposited duin theIII
6gei ioe, an PloeeRcn Ep.ch1& iI III