﻿244 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  Lignite. 
  — 
  One 
  of 
  the 
  gullies 
  at 
  the 
  head 
  of 
  Iron 
  Mine 
  Run 
  

   hollow 
  exposes 
  part 
  of 
  a 
  bed 
  of 
  lignite, 
  65 
  feet 
  above 
  tide. 
  

   An 
  attempt 
  was 
  made 
  to 
  mine 
  this 
  for 
  local 
  consumption 
  but 
  it 
  

   was 
  soon 
  given 
  up. 
  A 
  shaft 
  30 
  feet 
  deep 
  was 
  sunk 
  exposing 
  the 
  

   following 
  section 
  : 
  

   No. 
  

  

  1 
  . 
  Yellow 
  cla}^ 
  12 
  ft. 
  

  

  2. 
  Lignite 
  18 
  ft. 
  

  

  3. 
  Clay 
  not 
  passed 
  through. 
  

  

  Something 
  of 
  the 
  thickness 
  of 
  this 
  underclay 
  is 
  shown 
  by 
  a 
  

   boring 
  85 
  feet 
  deep 
  made 
  about 
  100 
  yards, 
  a 
  little 
  north 
  of 
  west 
  

   from 
  the 
  lignite 
  shaft, 
  which 
  passed 
  through 
  nothing 
  but 
  clay. 
  

  

  The 
  lignite 
  as 
  exposed 
  in 
  an 
  excavation 
  in 
  one 
  side 
  of 
  the 
  

   gully 
  shows 
  a 
  dip 
  of 
  44°, 
  S. 
  69° 
  E. 
  If 
  this 
  is 
  the 
  dip 
  shown 
  in 
  

   the 
  mine 
  the 
  real 
  thickness 
  of 
  the 
  lignite 
  is 
  about 
  12 
  feet. 
  This 
  

   dip 
  led 
  Bolton 
  to 
  surmise 
  that 
  the 
  lignite 
  and 
  sandstone, 
  shown 
  

   further 
  down 
  the 
  same 
  ravine, 
  dipped 
  beneath 
  the 
  salt. 
  

  

  Section 
  at 
  deep 
  boring. 
  — 
  That 
  this 
  idea 
  is 
  incorrect 
  is 
  shown 
  

   quite 
  conclusively 
  by 
  a 
  deep 
  boring 
  about 
  220 
  yards 
  from 
  the 
  

   lignite 
  in 
  the 
  direction 
  of 
  the 
  shaft. 
  

  

  Section 
  of 
  Deep 
  Boring 
  

  

  (Elevation 
  48 
  feet 
  above 
  tide) 
  

   No. 
  Depths 
  

  

  1. 
  0-4. 
  Fine 
  sandy 
  clay 
  soil 
  4 
  ft. 
  

  

  2. 
  4- 
  160. 
  Very 
  fine 
  grained, 
  soft 
  pink 
  and 
  drab 
  or 
  

  

  purple 
  sandstone 
  156 
  ft. 
  

  

  3. 
  160- 
  166. 
  Hard, 
  coarse 
  grained, 
  chocolate 
  colored 
  

  

  sandstone 
  6 
  ft. 
  

  

  4. 
  166-1005. 
  White 
  rock 
  salt 
  not 
  passed 
  through 
  839 
  ft. 
  

  

  This 
  section 
  clearly 
  shows 
  the 
  sandstone 
  on 
  top 
  of 
  the 
  salt 
  and 
  

   indicates 
  an 
  unconforraitj^ 
  between 
  the 
  salt 
  and 
  the 
  overlying 
  

   beds. 
  A 
  dip 
  of 
  slightly 
  more 
  than 
  44°, 
  S. 
  69° 
  E., 
  would 
  be 
  

   quite 
  sufficient 
  to 
  account 
  for 
  the 
  absence 
  of 
  lignite 
  in 
  this 
  

   section. 
  The 
  absence 
  of 
  gravel 
  is 
  quite 
  conspicuous. 
  

  

  Sandstone 
  of 
  Iro7i 
  Miyie 
  run. 
  — 
  The 
  sandstone, 
  3, 
  of 
  the 
  above 
  

   section, 
  is 
  exposed 
  all 
  along 
  the 
  sides 
  of 
  the 
  ravine 
  from 
  the 
  

   deep 
  boring 
  almost 
  to 
  the 
  bridge 
  near 
  the 
  shaft 
  . 
  As 
  exposed 
  it 
  

   is 
  a 
  ver)' 
  fine 
  grained 
  pink 
  sandstone 
  with 
  here 
  and 
  there 
  

   pieces 
  of 
  specular 
  iron 
  ore. 
  It 
  is 
  to 
  these 
  bits 
  of 
  iron 
  that 
  the 
  

  

  