﻿200 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  of 
  small 
  pieces 
  that 
  made 
  up 
  the 
  14 
  in. 
  stratum. 
  At 
  961 
  ft., 
  we 
  

   penetrated 
  a 
  stratum 
  that 
  contained 
  water. 
  This 
  stratum 
  was 
  10 
  

   ft. 
  in 
  thickness. 
  We 
  could 
  not 
  tell 
  what 
  the 
  formation 
  of 
  this 
  

   was, 
  as 
  we 
  took 
  out 
  none 
  of 
  the 
  drillings. 
  The 
  water 
  flowed 
  

   over 
  the 
  top 
  of 
  the 
  well 
  at 
  this 
  point. 
  There 
  was 
  also 
  a 
  dis- 
  

   charge 
  of 
  gas 
  from 
  the 
  well 
  that 
  would 
  burn. 
  The 
  water 
  was 
  

   very 
  strong 
  with 
  salt. 
  I 
  believe 
  this 
  same 
  well 
  was 
  sunk 
  deeper 
  

   by 
  some 
  other 
  parties 
  after, 
  but 
  what 
  was 
  found 
  below, 
  we 
  do 
  

   not 
  know." 
  

  

  The 
  temperature 
  of 
  the 
  water 
  is 
  83 
  ° 
  F. 
  The 
  gas 
  which 
  Mr. 
  

   Lukins 
  mentions, 
  is 
  collected 
  and 
  used 
  for 
  lighting 
  the 
  office 
  at 
  

   the 
  ice 
  factory. 
  

  

  Coushatta 
  bluffs. 
  — 
  The 
  faint 
  casts 
  of 
  Leda, 
  Luciyia, 
  Nuctila, 
  and 
  

   Venericardia 
  which 
  were 
  found 
  at 
  this 
  bluff, 
  while 
  proving 
  the 
  

   Eocene 
  age 
  of 
  the 
  material, 
  are 
  not 
  distinctive 
  enough 
  to 
  show 
  

   exactly 
  the 
  division 
  to 
  which 
  it 
  belongs. 
  The 
  Ledas 
  are 
  however 
  

   nearer 
  the 
  Lower 
  Claiborne 
  forms 
  than 
  either 
  the 
  Midway 
  or 
  

   Lignitic 
  forms. 
  The 
  section 
  here 
  shown 
  is 
  : 
  

  

  Section, 
  Coushatta 
  bluffs 
  

  

  6. 
  Orange, 
  red, 
  yellow, 
  gray 
  and 
  white 
  sand, 
  stratifica- 
  

   tion 
  generally 
  horizontal, 
  but 
  in 
  places 
  showing 
  

   cross-bedding. 
  It 
  contains 
  numerous 
  gray 
  clay 
  

   gravel 
  and 
  a 
  few 
  thin 
  clay 
  layers. 
  Changing 
  above 
  

   to 
  surface 
  soil 
  20 
  ft. 
  

  

  5. 
  Black 
  clay 
  with 
  thin 
  graj^ 
  sand 
  partings 
  below 
  becoming 
  

   light 
  brown 
  above. 
  Layer 
  about 
  eight 
  inches 
  thick 
  

   and 
  two 
  feet 
  from 
  the 
  base 
  contains 
  faint 
  casts 
  of 
  

   Leda, 
  Nucula, 
  Liicina 
  and 
  Veyiericardia 
  10 
  ft. 
  

  

  4. 
  Ver}^ 
  dark 
  brown 
  laminated 
  clay 
  filled 
  with 
  large 
  iron 
  

   concretions. 
  The 
  concretions 
  are 
  arranged 
  along 
  

   three 
  principal 
  lines 
  ; 
  at 
  the 
  base, 
  a 
  double 
  layer 
  

   about 
  14 
  feet 
  from 
  the 
  base 
  and 
  a 
  layer 
  at 
  the 
  top. 
  . 
  20 
  ft. 
  

  

  3. 
  Black 
  laminated 
  clay, 
  with 
  crystals 
  of 
  gypsum 
  6 
  ft. 
  

  

  2. 
  Dark 
  brown 
  sand 
  containing 
  a 
  few 
  thin 
  laj^ers 
  of 
  black 
  

  

  clay 
  3 
  ft- 
  

  

  I. 
  Black 
  laminated 
  sandy 
  clay, 
  showing 
  clay 
  partings 
  and 
  

  

  numerous 
  crystals 
  of 
  gypsum, 
  to 
  water 
  level 
  3 
  ft. 
  

  

  