128 CEMENT MATERIALS AND INDUSTRY. [bull. '2Vc ! 
CHICK AM A VGA LIMESTONE. 
DISTRIBUTION. 
The Chickamauga limestone occurs only in northwest Georgia! j 
appearing as a series of long, narrow bands, which usually trend N 
30° E. The distribution of this limestone is shown on PL IIlJ 
page 62. A few of the more prominent areas will be brieffy described 
beginning in the extreme northeastern portion of the State, particula 
attention being paid to outcrops located on or near railroads. 
A belt of Chickamauga limestone enters Georgia a few miles south 
west of Chattanooga, the Alabama Great Southern Railroad runniw 
on this limestone belt from near Chattanooga to a few miles below \ 
Trenton; another belt is crossed by the same railroad about 3 mila 
south of Rising Fawn; a third belt is followed closely by tin 
Southern Railroad from Rossville to Cedar Grove, and another belt i 
followed by the same road from Bronco to Menlo. The line fron 
Chattanooga to Summerville runs, for 5 miles east of Chickamauga 
across one of these limestone belts. An extensive belt of the limd 
stone borders the western faces of Taylors Ridge and White Oal 
Mountains, but is crossed by railroads only at two points, neau 
Ringgold and Lavender, respectively. Other belts are crossed a 
Dalton and between Dalton and Tunnelhill. 
The Chickamauga limestone is very extensively -exposed in tl 
northern half of Polk County, being crossed by railroads at or nea 
the stations of Esomhill, Cedartown, Fish Creek, Rockmart, Da r vittl 
and Taylorsville. As later noted, one Portland-cement plant is alreadj 
in operation at Rockmart utilizing this limestone. 
COMPOSITION. 
Throughout its range in Georgia the Chickamauga limestone is coin 
monly a rather pure rock, carrying 90 to 95 per cent of lime carbonafjli 
with less than 2 per cent of magnesium carbonate. Analyses 1 , Q i 
and 4: of the following table are fairly representative of the usua 
composition of the Trenton limestone. Analysis 3, on the other hand 
represents a highly magnesian type of rock that is fortunately uncoa 
moil in this series. 
