RAIN.l 
LEAD   AND   ZINC    RESOURCES    OF    UNITED    STATES.  265 
waters  caught  under  the  overlying  shale  make  a  return  circuit  to  the 
surface  and  produce  ore  bodies  along  its  edge.  In  the  Joplin  district 
the  mines  recently  developed  at  Baxter  Springs  may  be  cited  as  an 
example. 
MINOR   DISTRICTS. 
Outside  of.  the  Joplin  district  zinc  is  produced  at  a  number  of 
points  in  the  Mississippi  Valley.  The  lead-zinc  districts  of  central 
and  southeastern  Missouri  have  already  been  mentioned.  In  north- 
ern Arkansas,  principally  in  the  Yellville  district,  zinc  is  widely  dis- 
tributed and  some  mining  is  being  carried  on.  The  general  geology 
of  the  district  has  been  described  by  Mr.  Adams.a  In  1903  not  quite 
1,500  tons  of  ore  were  shipped  from  this  district;  in  1904 nearly  2,000 
tons  were  shipped.  From  the  fluorspar  district  of  western  Kentucky, 
described  by  Messrs.  Ulrich  and  Tangier  Smith,6  a  small  amount  of 
zinc  ore  is  shipped.  Until  recently  carbonate  formed  the  only  output, 
but  now  from  1,000  to  2,500  tons  of  blende  are  annually  marketed. 
The  ore  goes  mainly  to  the  oxide  furnaces.  At  present  several  prop- 
erties are  being  prospected,  but  only  one  or  two  ship  with  any  regu- 
larity. 
In  the  upper  Mississippi  district  the  Wisconsin  mines  especially 
are  being  vigorously  developed.  These  are  described  in  this  bulletin 
by  Messrs.  Grant  and  Ellis.  The  total  production  of  the  district  in 
1904  amounted  to  approximately  19,300  tons,  of  which  nearly  all  was 
blende.  The  mines  of  northwestern  Illinois  have  recently  been 
separately  discussed/  In  Iowa  at  present  very  little  work  is  being 
carried  on.  Perhaps  the  most  ambitious  attempt  is  that  at  the  Fitz- 
patrick  mine,  near  Buena  Vista.  Here  a  small  plant  has  been  erected, 
and  sinking  on  one  of  the  old  lead  ranges  is  under  way.  No  im- 
portant shipments  have  yet  been  made. 
ORES  OF  THE  EASTERN  AND  SOUTHERN  STATES. 
In  1903  the  States  east  of  the  Mississippi  Valley  are  credited  with 
a  production  of  12,301  tons  of  spelter.  They  should  also  be  cred- 
ited with  the  largest  part  of  the  oxide  production  of  the  year  and 
with  23,722  tons  of  ore  exported  from  the  port  of  New  York.  Prac- 
tically none  of  the  old  zinc-lead  mines  of  the  northern  Appalachians 
are.  now  open,  though  in  1903  an  attempt  was  made  to  reopen  the 
mines  at  Ellenville,  .N.  Y/z 
"Adams,  G.  I.,  Purdue,  A.  II.,  and  Burchard,  E.  P.,  Zinc  and  lead  deposits  of  northern 
Arkansas:   Prof.  Paper  U.  S.  Geol.  Survey  No.  24,  1904,  118  pages. 
6  Prof.  Paper  I".  S.  Geol.  Survey  No.  .''.»'»   (in  press). 
c  Bain,  II,  Foster.  Zinc  and  lead  deposits  of  northwestern  Illinois:  Bull.  U.  S.  Geol. 
Survey  No.  246,  1904,  f>l  pp. 
''  Ihlseng,  A.  O.,  The  zinc  mines  at  Ellenville,  N.  Y.  :  Bng.  and  Min.  Jour.,  April  LT>, 
1903. 
