﻿So 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  Sparta- 
  Mo7itgomery 
  road, 
  2^th 
  mile-board. 
  — 
  On 
  the 
  Sparta- 
  

   Montgomery 
  road, 
  about 
  one-half 
  mile 
  south 
  of 
  24th 
  mile 
  board 
  

   ferruginous 
  concretions 
  are 
  quite 
  abundant 
  at 
  the 
  road 
  side. 
  About 
  

   a 
  fourth 
  of 
  a 
  mile 
  north 
  of 
  this 
  and 
  at 
  a 
  slighth^ 
  lower 
  level 
  there 
  

   is 
  a 
  strip 
  of 
  black 
  land 
  exposing 
  large 
  yellow 
  limestone 
  boulders, 
  

   in 
  every 
  way 
  similar 
  to 
  limestone 
  boulders 
  which 
  are 
  so 
  common 
  

   on 
  the 
  little 
  prairie 
  spots 
  in 
  northern 
  Natchitoches. 
  Both 
  the 
  

   ferruginous 
  and 
  limestone 
  concretions 
  contain 
  many 
  casts 
  of 
  

   marine 
  shells. 
  This 
  locality 
  is 
  just 
  south 
  of 
  the 
  house 
  of 
  Mr. 
  

   James 
  Jackson, 
  about 
  Sec. 
  12, 
  11 
  N., 
  5 
  W. 
  Twin 
  prairie 
  is 
  a 
  

   little 
  patch 
  of 
  black 
  land 
  of 
  about 
  60 
  acres 
  situated 
  one-half 
  mile 
  

   southeast 
  of 
  Saunder's 
  church 
  (about 
  Sec. 
  12, 
  11 
  N., 
  5 
  W.). 
  

  

  The 
  ground 
  is 
  covered 
  with 
  very 
  small 
  limestone 
  concretions 
  

   and 
  in 
  some 
  of 
  the 
  gulleys 
  Lower 
  Claiborne 
  fossils 
  are 
  exposed 
  : 
  

   Anoniia, 
  PlicatiUa 
  jilamentosa, 
  Pseiidolive 
  vehcsta, 
  aLXxd. 
  Ostreafalci- 
  

   formis 
  were 
  among 
  the 
  specimens 
  collected. 
  

  

  Vasherie 
  branch. 
  — 
  On 
  this 
  branch 
  of 
  White 
  Oak 
  Creek, 
  about 
  

   10 
  miles 
  northwest 
  of 
  Winnfield, 
  Lerch 
  and 
  Vaughan 
  record 
  a 
  

   Lower 
  Claiborne 
  exposure 
  with 
  a 
  stratum 
  of 
  calcareous 
  marl 
  20 
  

   feet 
  thick.* 
  

  

  (Grant 
  Parish) 
  

  

  Georgetoiun. 
  — 
  We 
  were 
  not 
  able 
  to 
  find 
  any 
  traces 
  of 
  Tertiary 
  

   deposits 
  in 
  the 
  vicinity 
  of 
  this 
  place. 
  The 
  mill, 
  store, 
  and 
  sta- 
  

   tion 
  are 
  surrounded 
  on 
  all 
  sides 
  by 
  level 
  alluvial 
  lands. 
  Vaughan 
  

   cites 
  Lower 
  Claiborne 
  fossils 
  from 
  this 
  place. 
  f 
  

  

  (Caldwell 
  Parish) 
  

  

  Columbia. 
  — 
  The 
  Lignitic 
  sands 
  and 
  clays, 
  belonging 
  perhaps 
  

   to 
  the 
  Lower 
  Claiborne 
  stage 
  are 
  exposed 
  very 
  advantageously 
  

   for 
  study 
  around 
  the 
  station 
  and 
  for 
  some 
  distance 
  to 
  the 
  south 
  

   along 
  the 
  railway 
  track. 
  

  

  Nowhere 
  in 
  this 
  part 
  of 
  the 
  State 
  are 
  there 
  better 
  outcrops. 
  

  

  * 
  See 
  Lerch's 
  2d 
  Report, 
  etc., 
  p. 
  89 
  ; 
  and 
  Vaughan, 
  U. 
  S. 
  Geol.Sur., 
  Bull. 
  

   142, 
  p. 
  31. 
  

   fU. 
  S. 
  Geol. 
  Sur. 
  Bull. 
  No. 
  142, 
  p. 
  17. 
  

  

  