KAOLINS    AND    FIRE    CLAYS    OF    CENTRAL    GEORGIA.  313 
The  kaolin  contains— 
Feldspar. .] 
Quartz \  Sand 2.  GO 
Mica J 
Ferric  oxide 32 
Clay  substance 97 .  08 
100. 00 
BUTLER. 
At  Butler  white  clays  occur  in  considerable  quantity  and  have 
been  mined  at  one  locality.  The  clay  is  located  in  the  western 
belt  of  the  Tuscaloosa  and  is  typical  of  the  clays  of  this  belt.  A 
clay  mine  was  operated  for  a  few  years  at  a  point  2 J  miles  west  of 
Butler,  but  operations  there  have  been  suspended  since  1905.  The 
clay  bed  mined  has  a  maximum  thickness  of  20  feet  and  is  in  part 
sandy,  but  much  the  greater  portion  of  it  could  be  utilized  by  washing. 
The  clay  in  this  vicinity  occurs  in  lenticular  layers,  which  vary  greatly 
in  thickness  within  short  distances.  The  kaolin  varies  in  texture 
and  may  grade  rapidly  from  pure  clay  into  a  micaceous  sand.  It 
is  gray  or  cream  colored,  becoming  white  when  dry  and  is  soft  and 
plastic,  but  coarse  particles  of  quartz  are  scattered  throughout  its 
mass.  The  overburden  consists  of  sand  and  is  much  thinner  than  in 
most  localities.     It  reaches  a  maximum  of  20  feet. 
The  clay  was  run  through  an  air  separator  and  shipped  largely  as 
a  filler  for  wall  paper.  A  small  amount  was  also  shipped  to  the  cotton 
mills  at  Columbus,  Ga.,  where  it  was  used  for  sizing  cotton  cloth. 
A  sample  of  this  clay  was  analyzed  after  it  had  been  run  through 
a  pulverizer  and  air  separator. 
Analysis  of  kaolin  from  Butler,  Ga. 
[E.  Everhart,  analyst,.] 
M(  »ist  ur< i  at  1 00°  C 0.  65 
I  ,<  iss  <  >n  ignition 13.  26 
Silica 
Alumina 
Ferric  oxide 
Lime 
Magnesia 
Sodium  oxide.  .' 
Potassium  oxide 
Titanium  dioxide 
100. 04 
The  analysis  shows  that  the  clay  contains — 
Feldspar 0.6761 
Quartz 1.  490[  Sand 4. 186 
Mica 2  020] 
Ferric  oxide 1.  074 
Clay  substance , . . , , . , .  „ 94.  740 
100. 000 
47.  03 
37.  37 
1. 15 
Trace. 
.06 
.17 
.18 
.17 
