JOHNSON: TALLULAH DISTRICT. 
221 
directions. But the two fail to “match” properly, the western edge 
of the one being some hundreds of feet below the eastern edge of the 
other. The steep slope joining the edges of the discordant levels 
forms the escarpment, in northeastern Georgia called the Chatta¬ 
hoochee Ridge, in western South Carolina the Chattooga Ridge. 
Farther northeast the same feature is known as the Blue Ridge, or 
Blue Ridge escarpment, where a discordance between the two levels 
Fig. 3. — Physiographic provinces, showing location of Tallulah district. 
of from fifteen hundred to two thousand feet, or more, exists. Far¬ 
ther southwest the discordance in levels diminishes, until the two 
peneplains seem to merge into one. 
The simplicity of the relations detailed above is somewhat de¬ 
stroyed in northeastern Georgia and western South Carolina, by 
erosion and by the presence of higher mountain masses. 
The origin and significance of the escarpment are considered in 
another portion of this paper. 
The Appalachian mountains .— The Tallulah and adjacent ranges 
