﻿ADIRONDACK 
  MAGNETIC 
  IRON 
  ORES 
  

  

  37 
  

  

  MINES 
  NEAR 
  FORT 
  ANN 
  

  

  The 
  Potter, 
  Podunk 
  and 
  Mt 
  Hope 
  mines 
  are 
  situated 
  on 
  the 
  west 
  

   side 
  of 
  Putnam 
  mountain 
  in 
  Fort 
  Ann 
  township, 
  Washington 
  co. 
  

   They 
  are 
  reached 
  most 
  conveniently 
  from 
  Fort 
  Ann 
  village 
  which 
  

   by 
  the 
  indirect 
  wagon 
  road 
  is 
  9 
  miles 
  southeast. 
  The 
  elevation 
  of 
  

   their 
  outcrop 
  according 
  to 
  the 
  topographic 
  map 
  is 
  about 
  900 
  feet. 
  

   The 
  total 
  production 
  of 
  the 
  three 
  mines 
  is 
  reported 
  to 
  have 
  been 
  

   about 
  350,000 
  tons. 
  

  

  Potter 
  and 
  Podunk 
  mines. 
  The 
  ore 
  bodies 
  outcrop 
  near 
  the 
  foot 
  

   of 
  Podunk 
  pond 
  and 
  but 
  slightly 
  above 
  its 
  level. 
  They 
  are 
  included 
  

   in 
  a 
  belt 
  of 
  schists 
  which 
  belong 
  probably 
  to 
  the 
  Grenville 
  series, 
  

   though 
  no 
  limestone 
  was 
  found 
  in 
  the 
  vicinity. 
  The 
  schists, 
  as 
  

   exposed 
  in 
  the 
  hanging 
  wall 
  at 
  both 
  shafts, 
  consist 
  of 
  quart 
  zose 
  

   bands 
  alternating 
  with 
  thinly 
  laminated 
  hornblendic 
  and 
  micaceous 
  

   layers. 
  They 
  carry 
  considerable 
  amounts 
  of 
  pyrite. 
  Their 
  dip 
  is 
  

   45 
  northeast. 
  The 
  rock 
  on 
  the 
  foot-wall 
  side 
  is 
  concealed 
  for 
  some 
  

  

  Gram 
  ke. 
  

  

  S 
  c 
  a. 
  I 
  e. 
  oj- 
  feef 
  

  

  5 
  chi3t" 
  

  

  Fig. 
  2 
  

  

  Cross-section 
  of 
  the 
  Potter 
  mine, 
  showing 
  wall 
  rock 
  (Grenville 
  schist) 
  cut 
  

   off 
  on 
  the 
  south 
  by 
  granite 
  

  

  distance, 
  but 
  at 
  one 
  point 
  midway 
  between 
  the 
  two 
  mines 
  and 
  100 
  

   feet 
  south 
  there 
  is 
  an 
  exposure 
  of 
  reddish 
  gneissoid 
  granite. 
  This 
  

   rock 
  is 
  found 
  to 
  the 
  west 
  in 
  frequent 
  outcrops 
  and 
  in 
  such 
  relation 
  

   with 
  the 
  schists 
  that 
  its 
  intrusive 
  character 
  is 
  plainly 
  indicated. 
  

   It 
  is 
  a 
  microcline, 
  quartz, 
  hornblende 
  granite 
  quite 
  like 
  the 
  Ham- 
  

   mondville 
  type 
  except 
  that 
  the 
  texture 
  is 
  usually 
  more 
  finely 
  

   granulated. 
  

  

  The 
  Potter 
  mine 
  is 
  250 
  feet 
  northwest 
  of 
  the 
  Podunk. 
  It 
  was 
  

   opened 
  in 
  1879. 
  A 
  slope 
  100 
  feet 
  long 
  runs 
  down 
  the 
  footwall 
  

   at 
  an 
  average 
  inclination 
  of 
  32 
  . 
  At 
  the 
  time 
  of 
  Putnam's 
  report 
  

   the 
  ore 
  had 
  been 
  stoped 
  out 
  for 
  a 
  distance 
  of 
  175 
  feet 
  southeast 
  of 
  

   the 
  slope. 
  His 
  report 
  contains 
  a 
  sketch 
  of 
  the 
  workings 
  from 
  which 
  

  

  