21 
2.  The  red  ores  of  northern  Alabama,  including  ores  in  territory 
tributary  to  Chattanooga,  Attalla,  and  Gadsden. 
3.  The  gray  hematites  of  Talladega  and  adjoining  counties  in  east- 
ern Alabama. 
4.  The  brown  ores  of  the  Russell ville  district  in  northwestern 
Alabama. 
5.  The  brown  ores  of  the  Woodstock  district,  mostly  in  eastern  Tus- 
caloosa County. 
6.  The  brown  ores  of  eastern  Alabama,  occurring  in  a  belt  extend- 
ing from  the  Georgia  State  line,  near  Rock  Run,  southwestward 
through  the  Coosa  Valley  country  to  near  Brierfield. 
During  the  last  three  years  the  United  States  Geological  Survey  has 
carried  out  more  or  less  detailed  work  in  all  of  these  districts.  The 
present  bulletin  contains  reports  on  the  red  ores  of  the  Birmingham 
district,  the  Russellville  brown  ores,  and  the  Talladeja  County  gray 
ores.  Preceding  bulletins  of  this  series  have  contained,  as  noted  in 
the  bibliography  on  pages  213-214,  reports  on  the  red  ores  of  north- 
ern Alabama  and  on  the  Woodstock  brown  ores.  Work  on  the  brown 
ores  of  eastern  Alabama  has  been  carried  on,  but  the  results  are  not 
yet  ready  for  publication. 
So  far  as  final  publications  are  concerned,  a  detailed  report  on  the 
"Iron  ores  and  iron  industry  of  the  Birmingham  district,"  by  E.  C. 
Eckel  and  E.  F.  Burchard,  will  be  submitted  for  publication  as  a 
Survey  bulletin  in  the  spring  of  1907.  The  manner  in  which  the 
other  districts  of  the  State  will  be  handled  has  not  yet  been  decided. 
In  Tennessee  and  Georgia  work  has  also  been  carried  on  by  the 
Survey  on  both  the  red  and  brown  ores,  and  it  is  planned  to  complete 
certain  sections  of  this  work  during  1907. 
In  Virginia  work  has  also  been  taken  up  on  the  iron  ores,  but  for 
several  reasons,  notably  the  lack  of  good  topographic  base  maps,  no 
attempt  has  been  made  to  push  it  to  the  point  of  final  publication. 
Considered  from  either  an  industrial  or  geologic  point,  the  iron  ores 
of  Virginia  fall  into  six  groups: 
1.  Magnetites  and  specular  hematites  of  the  Blue  Ridge  and  Pied- 
mont districts. 
2.  Red  hematites  (Clinton  ores,  "fossil  ores,"  "oolitic  ores")  of  the 
foothills  of  the  Allegheny  Mountains. 
3.  Brown  hematites  (Oriskany  ores)  of  the  Goshen-Longdale-Oris- 
kany  district,  mostly  in  Augusta,  Bath,  Botetourt,  Alleghany,  and 
Craig  counties. 
4.  Brown  hematites  of  the  New  River-Cripple  Creek  district, 
mostly  in  Wythe  and  Pulaski  counties. 
5.  Brown  hematites  of  the  Roanoke,  Shenandoah,  and  Page 
valleys. 
