﻿11] 
  General 
  Geology 
  : 
  Lower 
  Claiborne 
  Eocene 
  85 
  

  

  Water 
  from 
  above 
  layer. 
  

  

  " 
  5 
  " 
  is 
  reported 
  to 
  be 
  slightly 
  sulphurous. 
  Water 
  for 
  " 
  7 
  " 
  is 
  

   strongly 
  impregnated 
  with 
  lime. 
  In 
  the 
  base 
  of 
  the 
  first 
  cut 
  

   west 
  of 
  Arcadia 
  are 
  about 
  3 
  feet 
  of 
  dark 
  sand}' 
  clay 
  with 
  thin 
  clay 
  

   partings, 
  and 
  patches 
  of 
  greensand. 
  Several 
  shark's 
  teeth 
  and 
  

   specimen 
  of 
  Byssoarca.Cardiiitn 
  and 
  De^italiuin 
  were 
  found 
  here. 
  

  

  About 
  three 
  miles 
  west 
  of 
  Arcadia 
  is 
  the 
  ' 
  ' 
  hog 
  back 
  ' 
  ' 
  railroad 
  

   cut. 
  A 
  rather 
  soft 
  layer, 
  bearing 
  greensand 
  is 
  here 
  overlaid 
  by 
  

   harder 
  clayey 
  material. 
  The 
  cut 
  was 
  originally 
  made 
  through 
  

   the 
  upper 
  clay, 
  and 
  a 
  little 
  way 
  into 
  the 
  greensand. 
  The 
  weight 
  

   of 
  the 
  top 
  material 
  squeezed 
  the 
  greensand 
  up 
  into 
  the 
  cut. 
  The 
  

   local 
  section 
  boss 
  states 
  that 
  the 
  railroad 
  company 
  has 
  had 
  to 
  

   lower 
  the 
  track 
  three 
  times, 
  each 
  time 
  about 
  three 
  feet. 
  It 
  is 
  

   this 
  sort 
  of 
  action 
  that 
  Hilgard 
  regards 
  as 
  having 
  formed 
  the 
  

   mud-lumps 
  of 
  the 
  passes 
  of 
  the 
  Mississippi. 
  A 
  few 
  casts 
  were 
  

   found 
  in 
  the 
  lower 
  part 
  of 
  the 
  greensand. 
  

  

  Gibbsland. 
  — 
  About 
  two 
  and 
  one-half 
  miles 
  east 
  of 
  Gibbsland 
  a 
  

   light 
  chocolate 
  colored 
  clay, 
  about 
  8 
  feet 
  up 
  in 
  the 
  cut 
  contains 
  

   many 
  casts 
  of 
  Leda^ 
  Venen'cardia 
  , 
  Dentalhini 
  and 
  a 
  small 
  Echino- 
  

   derm. 
  At 
  the 
  base 
  of 
  Mt. 
  Lebanon 
  are 
  easily 
  identified 
  Lower 
  

   Claiborne 
  fossils. 
  

  

  Hammetf 
  s 
  branch. 
  — 
  This 
  may 
  be 
  regarded 
  as 
  once 
  of 
  the 
  

   classic 
  Lower 
  Claiborne 
  localities 
  of 
  the 
  State. 
  It 
  is 
  situated 
  

   in 
  the 
  S. 
  W. 
  one-fourth 
  Sec. 
  30, 
  18 
  N., 
  6 
  W., 
  about 
  2 
  miles 
  

   northeast 
  of 
  Mt. 
  Lebanon. 
  The 
  main 
  exposure 
  is 
  in 
  a 
  little 
  

   gully 
  about 
  a 
  quarter 
  of 
  a 
  mile 
  from 
  the 
  road. 
  As 
  this 
  section 
  has 
  

   been 
  published 
  by 
  Johnson,* 
  Lerchf 
  and 
  Vaughan,| 
  it 
  is 
  hardly 
  

   necessary 
  to 
  republish 
  it 
  here. 
  

  

  (Bossier 
  Parish.) 
  

  

  Coushatta 
  bluff. 
  — 
  This 
  and 
  a 
  few 
  other 
  bluffs 
  on 
  Red 
  river 
  were 
  

   examined 
  by 
  Hopkins 
  and 
  Johnson, 
  and 
  later 
  by 
  Veatchof 
  this 
  

   Survey. 
  (See 
  special 
  report 
  on 
  Shreveport 
  area.) 
  Johnson 
  

   points 
  out 
  how 
  that 
  from 
  here 
  southeasterly 
  to 
  Rocky 
  mount 
  

  

  *5oth 
  Cong., 
  ist 
  Sess., 
  Hou. 
  Ex. 
  Doc, 
  vol. 
  26, 
  No, 
  195, 
  1888, 
  p. 
  20. 
  

   fBull. 
  for 
  Expt. 
  Station 
  : 
  Geol. 
  and 
  Agr., 
  part 
  i, 
  1892, 
  p. 
  20. 
  

   JBull. 
  U. 
  S. 
  Geol. 
  Surv., 
  No. 
  142, 
  1896, 
  pi. 
  i, 
  fig. 
  2. 
  

  

  