JOHNSON: TALLULAH DISTRICT. 
213 
of Deep Creek; the relations of a higher and lower peneplain sur¬ 
face to a prominent eastward-facing escarpment; certain well marked 
hanging valleys that exist in the area, and other points of special 
topographic significance. The greater part of the field work was 
confined to a rectangular area of 175 square miles, having Clarkes- 
ville at its southwest corner, Toccoa at the southeast, and the Tallu¬ 
lah Falls and Gorge a little north of the center. This area may be 
designated the “Tallulah district.” Within its limits are located 
all of the critically important features, and the field study upon which 
this report is based, was made by traversing the railroads, wagon 
roads, and mountain trails of the district, as well as the wild stream 
gorges where trails were seldom found. The results of this study 
appear to justify the following conclusions:— 
(1) The upper Savannah (Chattooga) River formerly flowed 
southwest through the Chattahoochee River into the Gulf of Mexico, 
but was diverted to the Atlantic drainage by a process of stream 
capture as has been previously announced by Hayes and Campbell. 
(2) This capture furnishes an example of what may be termed 
“remote capture,” having occurred so long ago that much of the 
direct evidence has been obliterated. 
(3) The capture resulted from the advantage gained by the Atlan¬ 
tic drainage over the Gulf drainage, owing to the shorter course to 
the sea which streams of the former system enjoyed and possibly to 
favorable crustal warping. 
(4) The place of the capture was near the junction of the Tallu¬ 
lah River with the Chattooga, and probably just below that junction. 
(5) The falls of the Tallulah River, while initially caused by the 
capture, exist to-day because of a hard rock barrier crossed by the 
river, but not yet worn down by it. 
(6) The similar falls which must have existed on the Chattooga 
River have been obliterated by that stream because the great lapse 
of time since the capture has been ample for it to grade its course in 
the less resistant rock over which it runs. 
Acknowledgements are due to Professor W. M. Davis for valuable 
advice and criticism, and to the Massachusetts Institute of Tech¬ 
nology for a grant of money for field expenses. 
