258  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY;  1904.        [bull.  260. 
S.  13°  E.  and  S.  11°  E.  There  is  faulting  of  some  magnitude  in  the 
region,  but  none  determinable  at  the  mines,  though  the  walls  show 
slickensided  surfaces.  The  vein  material  is  essentially  barite.  In 
the  latter  are  disseminated  crystals  of  galena  and  blende.  In  druses 
are  small  crystals  of  calcite,  and  coating  the  barite  is  often  a  crust  of 
strontianite.  In  the  same  region,  but  south  and  east  of  Lexington, 
fluorspar  is  found  in  similar  veins.  None  was  noted  at  the  George- 
town localities.  Very  little  mining  has  been  carried  on  here,  and  the 
opportunity  would  seem  to  be  rather  for  the  development  of  a  barite 
than  a  lead  industry.  Such  galena  as  was  found  was  being  sepa- 
rated by  fine  crushing  and  table  concentration.  A  small  furnace  is  in 
intermittent  operation. 
Missouri. — The  Missouri  lead  deposits  are  found  in  the  southern 
half  of  the  State,  in  the  Ozark  region.  Small  deposits  are  scattered 
over  nearly  all  of  the  area,  but  the  main  production  comes  from  two 
districts,  known  as  the  southwestern  and  the  southeastern.  The 
mines  of  the  southwestern  district  are  mainly  in  Jasper  and  Newton 
counties,  where,  in  connection  with  the  mining  of  zinc,  a  large  ton- 
nage of  lead  is  annually  produced.  In  the  southeast,  St.  Francois, 
Madison,  and  Washington  counties  are  the  principal  producers.  The 
total  production  of  ore  from  Missouri  in  1903  is  estimated  in  Mineral 
Industry  a  at  128.800  short  tons,  and  the  production  of  the  individual 
counties  as  below : 
Production  of  load  ore  in  Missouri  in  1903. 
Short  tons. 
St.  Francois 92,351 
Jasper 20, 974 
Madison    7,  083 
Washington    2.  387 
Scattered    G,  005 
Total   128,800 
In  general,  it  may  be  stated  that  of  the  Missouri  legd  output  ap- 
proximately four-fifths  comes  from  the  southeast  and  one-fifth  from 
the  southwest.  Since,  however,  a  considerable  quantity  of  the  ore  of 
the  southwest  is  marketed  as  a  sublimed  lead  the  proportions  of  pig 
lead  produced  would  be  somewhat  different. 
The  lead  deposits  of  southwestern  Missouri  will  be  considered  in 
connection  with  zinc.  Those  of  southeastern  Missouri  may  be  con- 
veniently divided  into  two  groups — the  deposits  of  St.  Francois  and. 
Madison  counties,  and  those  of  Washington  and  Franklin  counties. 
The  former  were  described  a  few  years  since  by  Mr.  Winslow.6     The 
"  The  Mineral  Industry  during  1903,  p.  225. 
6  Winslow,  Arthur,  The  disseminated  lead  ores  erf  southeastern  Missouri :  Bull.  U.  S. 
Geol.  Survey  No.  132,  1896,  31  pp. 
