﻿II] 
  General 
  Geology 
  : 
  Lignitic 
  Eocene 
  71 
  

  

  Grand 
  Ecore. 
  — 
  Hopkins 
  visited 
  this 
  section 
  as 
  early 
  as 
  1869 
  ^^^ 
  

   published 
  a 
  section 
  of 
  its 
  beds 
  in 
  his 
  first 
  annual, 
  1870, 
  p. 
  86. 
  

  

  The 
  beds 
  with 
  their 
  estimated 
  thicknesses 
  as 
  they 
  appear 
  just 
  

   above 
  the 
  landing, 
  or 
  terminus 
  of 
  the 
  R. 
  R. 
  track 
  areas 
  follows 
  : 
  

   10. 
  Sand 
  with 
  quartz 
  pebbles 
  10 
  ft. 
  

  

  9. 
  Orange-colored 
  sand, 
  with 
  white 
  clay-ball 
  concretions. 
  10 
  ft. 
  

  

  8. 
  Yellow 
  sand 
  2 
  ft. 
  

  

  7. 
  Colored 
  (greenish) 
  clays 
  3 
  ft. 
  

  

  6. 
  Finely 
  laminated, 
  light, 
  yellowish, 
  clayey 
  sand 
  18 
  ft. 
  

  

  5. 
  Brown, 
  black-banded, 
  lignitic 
  sand 
  9 
  ft. 
  

  

  4. 
  Black 
  and 
  gra}- 
  sand 
  and 
  sandy 
  clay 
  6 
  ft. 
  

  

  3. 
  Lignite 
  20 
  in. 
  

  

  2. 
  Black 
  clay 
  shale 
  2 
  ft. 
  

  

  I. 
  Grayish 
  sand 
  or 
  sandy 
  clay 
  5 
  ft. 
  

  

  Water 
  level. 
  

   The 
  face 
  of 
  the 
  bluff 
  farther 
  upstream, 
  as 
  well 
  as 
  the 
  top 
  of 
  

   the 
  low 
  bluffs 
  below, 
  show 
  many 
  large 
  light 
  yellowish 
  con- 
  

   cretions. 
  

  

  Cedar 
  bluff. 
  — 
  Nearly 
  east 
  of 
  Grand 
  Ecore, 
  on 
  the 
  Saline 
  

   bayou, 
  not 
  far 
  to 
  the 
  north 
  of 
  Congo, 
  P. 
  O., 
  on 
  the 
  land 
  of 
  Mr. 
  

   John 
  Kieffer 
  is 
  an 
  escarpment 
  commonly 
  known 
  as 
  Cedar 
  bluff, 
  

   which 
  seems 
  to 
  show 
  practically 
  the 
  same 
  series 
  of 
  lignitic 
  sands 
  

   as 
  have 
  just 
  been 
  enumerated 
  under 
  Grand 
  Ecore. 
  The 
  bed 
  of 
  

   lignite 
  here, 
  however, 
  is 
  below 
  water 
  level, 
  except 
  at 
  extreme 
  

   low 
  stages. 
  It 
  has 
  been 
  dug 
  in 
  small 
  quantities 
  and 
  used 
  locally. 
  

   It 
  is 
  evidently 
  the 
  same 
  as 
  the 
  seam 
  noted 
  in 
  the 
  Grand 
  Ecore 
  

   bluff, 
  but 
  is 
  of 
  a 
  decidedly 
  better 
  quality, 
  remaining 
  in 
  large 
  

   cuboidal 
  masses 
  or 
  chunks 
  after 
  having 
  been 
  exposed 
  to 
  the 
  air 
  

   for 
  months. 
  

  

  Cedar 
  bluff 
  is 
  particularly 
  rich 
  in 
  Indian 
  relics. 
  A 
  walk 
  of 
  a 
  

   few 
  mimutes 
  over 
  an}' 
  plowed 
  field 
  is 
  sufficient 
  for 
  the 
  collection 
  

   of 
  hands 
  full 
  of 
  fragments 
  of 
  pottery. 
  

  

  About 
  a 
  mile 
  to 
  the 
  south 
  of 
  the 
  bluff 
  on 
  the 
  St. 
  Maurice 
  road 
  

   a 
  Lower 
  Claiborne 
  prairie 
  is 
  struck, 
  which 
  shows 
  the 
  character- 
  

   istic 
  marine 
  moUuscan 
  species 
  and 
  fragments 
  of 
  light 
  yellowish 
  

   limestone. 
  

  

  Marthaville. 
  — 
  A 
  cut 
  on 
  the 
  railroad 
  at 
  this 
  place 
  shows 
  very 
  

   large, 
  hard, 
  light 
  yellowish 
  calcareous 
  boulders. 
  They 
  are 
  char- 
  

  

  