EASTERN RED HILLS. 41 



A yellowish siliceous rock (pseudo-buhrstone) is used 

 locally for chimneys in Henry and Coffee Counties, and a 

 limestone of uncertain age, scarcely distinguishable from 

 that in the lime hills already mentioned, is used in a similar 

 manner in Crenshaw County. The water supply is excel- 

 lent. Pure water can be obtained from shallow wells al- 

 most anywhere in the region, and a larger supply from 

 artesian wells, which however do not overflow but have to 

 be pumped. 



TOPOGRAPHY. 



The topography is nearly everywhere moderately hilly, 

 with broad ridges and narrow valleys, so that roads and 



FIG. 11. White Pond, in southern part of Barbour County, 

 July 25, 1919. 



railroads are located mostly on the uplands. The inland 

 edge of the region is a northward-facing escarpment, from 

 which extensive views may be had near Troy and Clayton 

 and doubtless elsewhere. The highest uplands are about 

 600 feet above sea-level, but there is nothing corresponding 

 to the mountains of the western division. The general ele- 

 vation of the uplands slopes gently southward, at the rate 

 of about ten feet per mile. Creeks, branches, and small 

 springs are numerous. There is no large navigable river in 

 this part of the State except the Chattahoochee on its east- 

 ern border. That has high banks and practically no swamp, 

 and the same is true of the Pea River, a much smaller 



