CLINTON  OR  RED  ORES  OF  NORTHERN  ALABAMA 
175 
The  difference  in  the  ore  from  the  different  slopes  on  the  upper  bed  is  rather  marked, 
for  slope  2  averages  31.24  per  cent  of  metallic  ircn,  while  slopes  1  and  3  average  only  about 
j27  per  cent.  This  is  accounted  for  by  the  fact  that  the  ore  from  slopes  1  and  3  passes 
through  a  crusher,  while  that  from  slope  2  is  hand  picked  and  sledged  over  bars.  The  ore 
from  the  bottom  bed,  as  will  be  seen,  is  somewhat  better  than  even  the  best  ore  from  the 
upper  bed. 
Mr.  Todd  furnished  the  following  average  analysis  of  all  the  hard  ore,  as  fed  to  the 
furnace: 
Average  analysis  of  hard  ore  from  mines  near  Baltelle,  Ala. 
Silica  (Si02) 9. 20 
Alumina  (AI2O3) 3.  G8 
Metallic  iron  (Fe) 27. 00 
Manganese  (Mn) .13 
Lime  (CaO) 22. 54 
Magnesia  (MgO) 1. 22 
Phosphorus  (P) 370 
Fort  Payne. — McCalley  a,  quotes  the  section  shown  by  a  well  driven  at  Fort  Payne 
furnace,  probably  about  1800.     Rearranged  slightly,  this  sect  ion  is  as  follows: 
Section  of  well  at  Fort  Payne  furnaa  ,  Alabama. 
Soil 
Fort  Payne  chert 
Devonian  black  shale 
"Clinton"  green  and  gray  shales. 
"Clinton"  shales  and  ore 
"Clinton"  shales,  sands,  and  ore. 
"Clinton"  shales  and  sandstone.. 
"Clinton"  ferruginous  sandstone. 
"Clinton"  shales  and  sandstone. . 
Chickamauga  limestone 
Thick- 
ness. 
Feet. 
25 
190 
12 
340 
18 
50 
180 
50 
40 
Depth. 
Feet. 
0-25 
25-215 
215-227 
227-5G7 
567-585 
585-635 
635-815 
815-865 
865-905 
905- 
The  well  section  given  above  can  be  compared  directly  with  the  following  section,  meas- 
ured in  1905  by  Mr.  L.  N.  Christensen  and  the  writer  through  the  gap  back  of  Fort  Payne 
furnace. 
Section  through  gap  back  of  Fort  Pay  tie  furnace,  Alabama. 
Feet. 
Fort  Payne  chert. 
Chattanooga  shale 24£ 
Sandstone  and  shale 306 
Ore 2-21 
Shale  parting 1J-2J 
Ore 2J-3 
Shale 270 
Covered  interval,  probably  mostly  limestone 246 
Chickamauga  limestone. 
Readings  taken  at  a  number  of  points  in  this  gap  gave  a  very  uniform  dip — varying 
only  from  13£°  to  1 5°  to  the  southeast. 
a  Report  on  the  Valley  Regions  of  Alabama,  pt.  2,  p.  154. 
Bull.  285-06 12 
