﻿78 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  1. 
  Ostrea 
  bed 
  — 
  top 
  of 
  hill 
  3 
  ft. 
  

  

  2. 
  Greenish 
  gray 
  to 
  slate 
  colored 
  clayey 
  marl, 
  joining 
  

  

  black 
  soil. 
  A 
  few, 
  poorly 
  preserved 
  shells 
  occur 
  in 
  

   this 
  layer. 
  The 
  best 
  preserved 
  was 
  a 
  strongly 
  

   ribbed 
  Corbula 
  50 
  ft. 
  

  

  3. 
  Dark 
  brown 
  sand 
  with 
  plates 
  of 
  iron 
  8 
  ft. 
  

  

  In 
  the 
  creek 
  east, 
  layer 
  3 
  was 
  not 
  seen. 
  In 
  the 
  creek 
  bed 
  are 
  

  

  numerous 
  very 
  long 
  limestone 
  concretions. 
  The 
  sides 
  of 
  the 
  

   hill 
  are 
  covered 
  with 
  gravel 
  and 
  f 
  urruginous 
  pebble 
  conglomerate 
  

   and 
  sandstone, 
  but 
  in 
  no 
  place 
  did 
  the 
  gravel 
  unquestionably 
  

   pass 
  under 
  the 
  marl. 
  

  

  Similar 
  small 
  prairies 
  with 
  the 
  characteristic 
  oysters, 
  Ostrea 
  

   falciformis, 
  and 
  O. 
  johnsoni 
  var., 
  occur 
  north 
  of 
  the 
  locality 
  at 
  

   the 
  following 
  places 
  : 
  Sec. 
  5-8, 
  Sec. 
  21-28, 
  12 
  N., 
  6 
  W. 
  and 
  at 
  

   Black 
  prairie 
  hill 
  N. 
  K- 
  ^ 
  Sec. 
  23, 
  13 
  N., 
  7 
  W. 
  

  

  (Winn 
  Parish) 
  

  

  St. 
  Maurice. 
  — 
  Here 
  the 
  Lower 
  Claiborne 
  beds 
  are 
  well 
  

   exposed 
  on 
  the 
  left 
  bank 
  of 
  Saline 
  bayou 
  near 
  its 
  mouth. 
  Plate 
  

   5 
  herewith 
  given 
  shows 
  well 
  the 
  most 
  important 
  features 
  of 
  

   the 
  bluff. 
  The 
  view 
  is 
  taken 
  looking 
  down-stream. 
  The 
  ledge 
  

   in 
  the 
  baj^ou, 
  showing 
  a 
  steep 
  southerly 
  local 
  dip 
  is 
  composed 
  of 
  

   reddish 
  clay 
  ironstone. 
  Then 
  succeed 
  5 
  feet 
  of 
  bluish, 
  blackish, 
  

   or 
  brownish 
  barren 
  clays. 
  Above 
  are 
  blue 
  clays, 
  5 
  feet 
  with 
  

   arenaceous 
  ferruginous 
  concretions. 
  Shells 
  are 
  abundant 
  in 
  this 
  

   layer. 
  Still 
  higher 
  are 
  10 
  ft., 
  of 
  brown, 
  brittle 
  clays 
  with 
  

   yellow 
  flakes. 
  Finally, 
  the 
  upper 
  25 
  feet 
  of 
  the 
  bluff 
  are 
  composed 
  

   of 
  brownish 
  laminated 
  sandy 
  clays, 
  becoming 
  lighter 
  in 
  color 
  and 
  

   more 
  sandy 
  towards 
  the 
  top 
  of 
  the 
  bluff. 
  

  

  The 
  character 
  of 
  these 
  underlying 
  beds 
  has 
  less 
  influence 
  over 
  

   the 
  character 
  of 
  the 
  soils 
  in 
  this 
  region 
  than 
  might 
  at 
  first 
  be 
  

   supposed, 
  for 
  they 
  are 
  often 
  concealed 
  by 
  Lafayette 
  sands 
  

   and 
  gravels. 
  

  

  Concerning 
  the 
  paleontology 
  of 
  this 
  locality 
  see 
  historical 
  part 
  

   of 
  this 
  report, 
  p. 
  34 
  and 
  especially 
  next 
  year's 
  report. 
  

  

  Between 
  this 
  locality 
  and 
  Wheeling 
  the 
  country 
  is 
  somewhat 
  

   hilly 
  at 
  first 
  near 
  the 
  Red 
  river, 
  but 
  becomes 
  more 
  rolling 
  or 
  

   level 
  to 
  the 
  east. 
  

  

  