174  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1906,  PART    I. 
l'.-ice 
Coarse  sandstone  giving  rise  to  deep  iron  red  soil I 
Beginning  of  another  iron  series 65 
Eastern  wall  of  iron  member.     This  series  is  made  up  of  a  number  of  thin  beds 
of  hematite  ore  separated  from  one  another  by  slate  partings.     The  ore  is 
quite  quartzose;  dip  45°  E 65 
Sandy  shaly  slates;  dip  conformable  with  iron  series 6J 
Sandy  shales;  dip  60°  E 61 
Heavy  fine  sandstone  rather  poorly  consolidated,  dip  37°  E I 
Thinly  laminated  shaly  sandstones T. 
Heavier  sandstone,  fine-grained  but  rather  massive;  nonquart  zitic 7! 
In  the  more  eastern  limb  of  Columbiana  Mountain  the  iron  sea 
appears  on  the  western  slopes.  As  the  dip  of  the  rocks  is  easterly,  tt 
hematite  apparently  underlies  the  heavy  quartzitic  sandstone  ths 
caps  the  summit  of  the  mountain.  This  shows  the  same  comple 
relation  that  has  been  observed  in  Talladega  County,  namely,  thati 
places  the  dip  of  the  ore  would  seem  to  cany  it  below  the  quartzit 
sandstone,  while  in  other  places  it  appears  to  be  above. 
No  gray  ore  lias  been  found  in  cither  Alpine  Mountain  or  the  Talli 
dega  Hills,  but  as  the  same  series  that  occur  in  the  productive  are; 
are  found  also  in  these1  hills  they  may  be  considered  as  possible  area 
In  the  Talladega  Hills  there  are  numerous  brown  ore  deposits  at  tl 
horizon  in  which  gray  ore  occurs  farther  south.  It  would  appet 
therefore,  that  the  horizon  of  the  gray  ore  is  at  some  places  occupiw 
either  by  lean  ferruginous  sandstone  or  by  limonite  deposits. 
The  other  possibly  productive4  area  noted  is  the  western  limb 
the  Weewoka  Hills  or  Mallory  Mountain.  In  this  mountain  althoujt 
the  rocks  appear  to  belong  to  the  same  geological  horizon  as  thou 
of  the  eastern  range  of  the  Weewoka  Hills  there  is  no  trace  of  grr, 
ore.  Instead,  just  at  the  places  where  gray  ore  would  be  expect k 
there  are  brown  ore  deposits,  a  fact  that  will  be  further  considered ii 
the  discussion  of  the  origin  of  the  ore  deposits.  So  far  as  the  presed 
investigation  has  shown,  however,  it  does  not  seem  probable  til 
any  gray  ore  of  economic  importance  will  be  discovered  in  Alpi : 
Mountain,  the  Talladega  Hills,  or  Mallory  Mountain. 
.  CHARACTER  OF  THE  ORE. 
Practically  all  the  so-called  gray  ore  in  Talladega  County  is  res 
hematite.  An  analysis  made  in  the  chemical  laboratory  of  I 
United  States  Geological  Survey  (No.  2241)  of  an  average  sam) 
of  ore  from  Heacock  Mountain,  Weewroka  Hills,  gives  70.04  per  c  i 
Fe803  and  0.74  per  cent  FeO.  If  all  the  ferrous  iron  in  this  anabs] 
is  derived  solely  from  magnetite  the  relative  percentages  of  the  tr 
minerals  would  be  97  per  cent  hematite  and  3  per  cent  magnet  I 
