﻿IRON 
  ORES 
  OF 
  THE 
  CLINTON 
  FORMATION 
  

  

  3* 
  

  

  SECTION 
  AT 
  WALLINGTON 
  

  

  Strata 
  

  

  From 
  To 
  

  

  Feet 
  Inches 
  Feet 
  Inches 
  

  

  Character 
  

  

  Soil 
  

  

  Shale 
  

  

  Limestone 
  

   Shale 
  

  

  Shale 
  

  

  Shale 
  

  

  Limestone 
  

  

  Shale 
  

  

  Shale 
  . 
  

  

  Shale, 
  

  

  Limestone. 
  

  

  Ore 
  

  

  Limestone 
  

   Ore 
  ..... 
  . 
  

  

  Shale 
  

  

  Shale. 
  . 
  . 
  . 
  

  

  70 
  

  

  80 
  

  

  88 
  

  

  115 
  

  

  130 
  

  

  *33 
  

  

  184 
  

  

  205 
  

  

  7° 
  

  

  o 
  115 
  

  

  130 
  

  

  6 
  i33 
  

  

  197 
  

  

  197 
  

  

  6 
  

  

  198 
  

  

  6 
  

  

  198 
  

  

  6 
  

  

  199 
  

  

  4 
  

  

  199 
  

  

  4 
  

  

  200 
  

  

  

  

  200 
  

  

  

  

  205 
  

  

  

  

  o 
  207 
  

  

  Light 
  gray 
  above, 
  becoming 
  

   darker 
  and 
  more 
  fossiliferous 
  be- 
  

   low. 
  Represents 
  basal 
  Rochester. 
  

  

  Light 
  colored, 
  layers 
  2 
  to 
  16 
  

   inches 
  separated 
  by 
  thin 
  shales, 
  

   1 
  to 
  6 
  inches. 
  Upper 
  Clinton 
  

   limestone. 
  

  

  In 
  appearance 
  this 
  shale 
  is 
  

   similar 
  to 
  the 
  basal 
  Rochester. 
  

   It 
  is 
  fully 
  as 
  dark 
  and 
  its 
  numer- 
  

   ous 
  fossils 
  are 
  evenly 
  distributed 
  

   through 
  the 
  mass, 
  giving 
  it 
  a 
  

   variegated 
  appearance. 
  

  

  Similar 
  to 
  above, 
  but 
  with 
  

   fewer 
  fossils 
  and 
  of 
  a 
  lighter 
  

   shade. 
  

  

  These 
  dark 
  layers 
  include 
  the 
  

   graptolite 
  beds 
  with 
  the 
  charac- 
  

   •teristic 
  form 
  M. 
  clintonen- 
  

   s 
  i 
  s 
  . 
  

  

  The 
  limestone 
  contains 
  layers 
  

   of 
  shale 
  1 
  to 
  3 
  inches 
  thick. 
  Pen- 
  

   tamerus 
  is 
  the 
  characteristic 
  fos- 
  

   sil 
  of 
  the 
  limestone. 
  

  

  Fossiliferous 
  dark 
  and 
  olive- 
  

   gray 
  shale 
  with 
  included 
  bands 
  of 
  

   limestone. 
  Transitional 
  from 
  the 
  

   limestone 
  above. 
  The 
  division 
  is 
  

   at 
  point 
  where 
  shale 
  predomi- 
  

   nates 
  over 
  the 
  limestone. 
  

  

  A 
  uniform 
  purple 
  shale; 
  con- 
  

   tains 
  bands 
  of 
  pearly 
  limestone 
  

   made 
  up 
  of 
  the 
  fossil 
  Anoplo- 
  

   theca 
  h 
  e 
  m 
  i 
  s 
  p 
  h 
  e 
  r 
  i 
  c 
  a 
  . 
  

  

  The 
  purple 
  shale 
  above 
  changes 
  

   rather 
  abruptly 
  to 
  this 
  olive-gray 
  

   shale 
  which 
  passes 
  gradually 
  into 
  

   the 
  limestone 
  below. 
  

  

  Characterized 
  by 
  the 
  fossil 
  

   Pentamerus. 
  The 
  limestone 
  is 
  

   uniform 
  above. 
  Near 
  the 
  middle 
  

   is 
  found 
  some 
  flinty 
  material 
  giv- 
  

   ing 
  the 
  rock 
  a 
  brecciated 
  appear- 
  

   ance. 
  Layers 
  of 
  shale 
  in 
  lower 
  

   part. 
  First 
  trace 
  of 
  ore 
  at 
  195 
  

   feet. 
  

  

  Impure 
  fossil 
  ore. 
  

  

  Includes 
  some 
  shale. 
  

  

  Fossil 
  ore. 
  

  

  Soft 
  green 
  calcareous 
  shale. 
  

   The 
  upper 
  2% 
  inches 
  is 
  brecciated, 
  

   arenaceous 
  limestone 
  containing 
  

   black 
  shale 
  pebbles. 
  

  

  Soft 
  mottled 
  shale 
  if 
  the 
  Me- 
  

   dina 
  formation. 
  

  

  