DRAIN A GE MODIFICA TIONS 



673 



At this point, which is in the vicinity of Gainsville, Georgia, 

 the capture of the Chattahoochee is imminent, and if conditions 

 remain unchanged, will doubtless be accomplished in the near 

 geologic future. In the vicinity of Tallulah Falls t'he same 

 process has been carried on, but in this case it has reached com- 

 ])lction, and the Savannah River has cut throug^h the divide and 



Fig. 12. 



captured the portion L M, which formerly constituted the head- 

 waters of the Chattahoochee. 



The minor drainage lines in the Chattahoochee basin have 

 also arranged themselves parallel with the line of greatest slope 

 of the surface. They, in turn, are encroaching upon the drain- 

 age basins to the northwest, although their headward progress 

 is greatly retarded by the mountainous character of the divide 

 upon which they are encroaching. At the point E, however, a 

 small branch of the Chattahoochee has already succeeded in 

 capturing the stream E F, which doubtless previously belonged 

 to the Etowah River. 



This example is somewhat complicated by complex geologic 

 structure, but the arrangement of the minor streams across this 

 structure appears to be evidence of even a more pronounced 

 tilting of the surface than that which has caused such a radical 



