﻿92 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  A 
  typical 
  cut 
  can 
  be 
  seen, 
  along 
  the 
  track 
  about 
  one 
  mile 
  south 
  

   of 
  the 
  station. 
  Zeiiglodon 
  bones 
  are 
  found 
  here. 
  A 
  vertebra 
  

   purchased 
  of 
  Mr. 
  Porter 
  shows 
  an 
  oyster 
  grown 
  upon 
  it, 
  proving 
  

   that 
  the 
  Zeuglodoyi 
  died 
  and 
  its 
  flesh 
  decayed 
  before 
  the 
  oyster 
  

   was 
  attached. 
  

  

  In 
  an 
  old 
  field 
  about 
  three-quarters 
  of 
  a 
  mile 
  north 
  of 
  the 
  sta- 
  

   tion, 
  along 
  numerous 
  little 
  washes 
  in 
  the 
  field, 
  many 
  well-pre- 
  

   served 
  fossils 
  are 
  obtained. 
  L,igniferous 
  clays 
  appear 
  in 
  the 
  

   branches 
  to 
  the 
  north. 
  A 
  cut 
  one 
  mile 
  north 
  of 
  the 
  station 
  shows 
  

   southward 
  dipping 
  lignitic 
  clays, 
  superimposed 
  by 
  what 
  seems 
  

   to 
  be 
  Jackson 
  marly 
  clays. 
  

  

  There 
  seems 
  to 
  be 
  a 
  slight 
  nonconformity 
  between 
  the 
  two 
  

   classes 
  of 
  deposits. 
  

  

  Olla. 
  — 
  Going 
  still 
  farther 
  northward 
  from 
  TuUos 
  we 
  saw 
  no 
  

   good 
  exposures. 
  Gray 
  buckshot 
  clays 
  appear 
  in 
  shallow 
  cuts. 
  

   At 
  Olla 
  wells 
  are 
  said 
  to 
  penetrate 
  marls 
  with 
  calcareous 
  con- 
  

   cretions. 
  

  

  lyerch 
  reports 
  fossils 
  from 
  the 
  region 
  in 
  Sec. 
  34, 
  ii 
  N., 
  2 
  K.* 
  

  

  Ouachita 
  river. 
  — 
  The 
  Jackson 
  is 
  exposed 
  in 
  numerous 
  places 
  

   along 
  Ouachita 
  river 
  below 
  Columbia. 
  It 
  was 
  in 
  this 
  region 
  that 
  

   Judge 
  Bry 
  found 
  in 
  1832 
  the 
  bones 
  of 
  the 
  Zeuglodon 
  and 
  the 
  

   shells 
  which 
  caused 
  Conrad 
  to 
  refer 
  the 
  region 
  to 
  the 
  Eocene. 
  f 
  

  

  In 
  1 
  84 
  1 
  Conrad 
  described 
  a 
  new 
  species, 
  Cardiuni 
  nicolletti, 
  

   from 
  this 
  region.]; 
  

  

  Hopkins 
  visited 
  Grand 
  view 
  bluff 
  in 
  1869 
  and 
  found 
  several 
  

   bones 
  of 
  Zeuglodon 
  there. 
  The 
  presence 
  of 
  the 
  little 
  Orbitoline 
  

   forms, 
  which 
  are 
  common 
  in 
  the 
  Jackson 
  of 
  this 
  State, 
  led 
  him 
  

   to 
  confuse 
  some 
  of 
  the 
  beds 
  northeast 
  of 
  the 
  bluff 
  with 
  the 
  

   Vicksburg. 
  

  

  In 
  1866 
  Aldrich 
  described 
  a 
  new 
  species 
  of 
  gastropod, 
  Haminea 
  

   grandis, 
  from 
  Bunker 
  Hill 
  bluff. 
  

  

  The 
  first 
  fossiliferous 
  outcrops 
  we 
  saw 
  on 
  Ouachita 
  river 
  below 
  

   Columbus 
  were 
  at 
  Gibson's 
  landing. 
  In 
  the 
  bluff 
  at 
  this 
  place 
  

   is 
  a 
  layer 
  of 
  fossiliferous 
  sandy 
  clay 
  about 
  eight 
  feet 
  thick, 
  and 
  

   about 
  fifty 
  above 
  water 
  level. 
  In 
  a 
  small 
  branch 
  about 
  a 
  mile 
  

  

  *Bull. 
  La. 
  Expt. 
  Sta., 
  part 
  i, 
  p. 
  92. 
  

  

  tjour. 
  Phil. 
  Acad. 
  Nat. 
  Sci., 
  vol. 
  7, 
  1834, 
  p. 
  120. 
  

  

  XVtoc. 
  Phil. 
  Acad. 
  Nat. 
  Sci. 
  for 
  1841, 
  p. 
  33. 
  

  

  