﻿64 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  he 
  definitely 
  states 
  that 
  these 
  characteristic 
  fossils 
  came 
  from 
  

   King's 
  salt 
  works, 
  S. 
  35, 
  15 
  N., 
  8 
  W. 
  

  

  Vaughan* 
  has 
  recently 
  shown 
  that 
  Hilgard 
  was 
  mistaken 
  in 
  

   his 
  identification 
  G. 
  pitchei^i, 
  it 
  being 
  a 
  Comanche 
  stage 
  fossil, 
  

   while 
  the 
  deposits 
  with 
  E. 
  costata 
  must 
  be 
  Upper 
  Cretaceous. 
  

   Yet 
  Vaughan 
  did 
  not 
  suggest 
  what 
  Hilgard's 
  G. 
  pitcheri 
  reall}^ 
  

   was. 
  We 
  know 
  now 
  from 
  the 
  collections 
  made 
  at 
  the 
  place 
  by 
  

   Veatch 
  that 
  this 
  species 
  is 
  no 
  other 
  than 
  O. 
  pulaskensis, 
  Har., 
  a 
  

   typical 
  Midway 
  Eocene 
  species. 
  

  

  Hilgard 
  properly 
  describes 
  the 
  rocks 
  from 
  which 
  these 
  shells 
  

   were 
  obtained 
  as 
  a 
  soft 
  graj^, 
  calcareous 
  mass. 
  In 
  fact 
  it 
  is 
  most 
  

   strikingly 
  similar 
  to 
  the 
  basal 
  Eocene 
  beds 
  around 
  Prairie 
  bluff, 
  

   and 
  Snow 
  hill, 
  Alabama. 
  

  

  He 
  remarks 
  : 
  " 
  A 
  few 
  hundred 
  yards 
  northward 
  of 
  the 
  lick, 
  

   there 
  is 
  a 
  dug 
  well 
  20 
  feet 
  deep 
  in 
  which 
  a 
  similar 
  rock 
  was 
  

   struck 
  at 
  5 
  feet, 
  which 
  became 
  harder 
  as 
  the 
  depth 
  increased, 
  and 
  

   had 
  to 
  be 
  blasted. 
  The 
  rock 
  now 
  lying 
  near 
  the 
  well 
  is 
  a 
  rather 
  

   hard, 
  crystalline 
  limestone, 
  full 
  of 
  debris 
  of 
  shells 
  ; 
  a 
  great 
  

   many 
  perfect 
  ones 
  were 
  found 
  in 
  digging 
  ; 
  one 
  described 
  to 
  me 
  

   must 
  have 
  been 
  a 
  /«;/?>«. 
  No 
  salt 
  water 
  was 
  obtained 
  in 
  this 
  

   well." 
  

  

  Other 
  localities. 
  — 
  That 
  the 
  above 
  two 
  were 
  the 
  only 
  places 
  in 
  

   Louisiana 
  where 
  Midway 
  or 
  Lowest 
  Eocene 
  beds 
  outcrop, 
  seems 
  

   very 
  improbable. 
  Black 
  land 
  areas 
  reported 
  from 
  Mansfield 
  

   westward 
  may 
  possibly 
  owe 
  their 
  origin 
  to 
  the 
  calcareousness 
  of 
  

   this 
  stage. 
  Another 
  place 
  that 
  must 
  be 
  looked 
  up 
  shortly 
  is 
  on 
  

   the 
  Soda 
  lake 
  where 
  Collinsf 
  reports 
  ' 
  ' 
  Nautilus 
  dekayi 
  ' 
  ' 
  half- 
  

   way 
  between 
  Albany 
  and 
  Henderson's 
  mills. 
  

  

  LiGNiTic 
  Stage 
  

  

  Preliminary 
  Remarks 
  

  

  The 
  presence 
  of 
  this 
  stage 
  west 
  of 
  the 
  Mississippi 
  has 
  been 
  

   suspected 
  ever 
  since 
  its 
  dilTerentiation, 
  and 
  its 
  true 
  relationshij)s 
  

   to 
  the 
  other 
  Eocene 
  stages 
  was 
  worked 
  out 
  along 
  the 
  river 
  courses 
  

   in 
  Alabama. 
  

  

  *Amer. 
  Geol. 
  vol. 
  15, 
  p. 
  207. 
  

  

  t43dCon., 
  1st 
  sess. 
  Ho. 
  Ex. 
  Doc. 
  vol. 
  2, 
  pt. 
  2, 
  p. 
  661, 
  1874. 
  

  

  