﻿74 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  iron 
  ore 
  of 
  Louisiana 
  and 
  Texas, 
  that 
  it 
  is 
  the 
  lower 
  portion 
  of 
  

   the 
  Claiborne 
  group 
  of 
  strata 
  that 
  occurs 
  in 
  Louisiana 
  and 
  Texas. 
  

   He 
  properly 
  refers 
  a 
  portion 
  at 
  least 
  of 
  the 
  St. 
  Maurice 
  bluff 
  to 
  

   this 
  horizon. 
  Also 
  the 
  bluff 
  at 
  Natchitoches, 
  and 
  many 
  local- 
  

   ities 
  in 
  Bienville, 
  Claiborne, 
  Webster, 
  and 
  Bossier 
  parishes 
  were 
  

   properly 
  arranged 
  under 
  this 
  stage. 
  

  

  It 
  has 
  remained 
  for 
  this 
  survey 
  to 
  rectify 
  the 
  work 
  of 
  former 
  

   reconnaissances 
  west 
  of 
  Red 
  river. 
  

  

  Areai. 
  Distribution 
  

  

  The 
  map. 
  — 
  All 
  along 
  the 
  northern 
  tier 
  of 
  counties, 
  from 
  the 
  

   Dorchite 
  to 
  the 
  Onachita 
  there 
  may 
  be 
  uplifts 
  of 
  beds 
  belonging 
  

   to 
  the 
  Lignitic 
  stage, 
  for 
  molluscan 
  remains 
  are 
  generall}^ 
  want- 
  

   ing 
  in 
  these 
  parts. 
  The 
  general 
  trend 
  of 
  the 
  various 
  geological 
  

   stages 
  of 
  this 
  part 
  of 
  the 
  State 
  would 
  indicate 
  that 
  all 
  this 
  terri- 
  

   tory 
  is 
  Lower 
  Claiborne 
  as 
  mapped. 
  

  

  The 
  doubtful 
  area 
  about 
  Shreveport 
  has 
  been 
  elsewhere 
  dis- 
  

   cussed. 
  (See 
  Shreveport 
  area.) 
  

  

  Otherwise 
  the 
  mapping 
  of 
  the 
  Lower 
  Claiborne 
  may 
  be 
  

   regarded 
  as 
  approximately 
  correct. 
  

  

  Localities 
  

   (Sabine 
  parish) 
  

  

  Lozv' 
  s 
  creek 
  below 
  Sahinetown 
  , 
  Tex. 
  — 
  This 
  locality 
  has 
  already 
  

   been 
  referred 
  to 
  in 
  connection 
  with 
  the 
  Lignitic 
  stage. 
  At 
  the 
  

   ford 
  perhaps 
  one-fourth 
  mile 
  below 
  the 
  w^ater 
  mill 
  on 
  this 
  

   creek, 
  ledges 
  of 
  Lower 
  Claiborne 
  calcareous 
  rock 
  occur, 
  char- 
  

   acterized, 
  among 
  other 
  fossils 
  by 
  Ostrea 
  falciformis. 
  

  

  Lower 
  Negreet. 
  — 
  Near 
  the 
  mouth 
  of 
  this 
  baj'ou 
  there 
  is 
  a 
  cross 
  

   bedded 
  conglomerate, 
  very 
  ferruginous 
  and 
  rough 
  in 
  appearance 
  

   with 
  quartz 
  pebbles 
  and 
  clayey 
  and 
  glauconitic 
  nodules, 
  contain- 
  

   ing 
  fossils 
  of 
  this 
  stage. 
  A 
  bed 
  of 
  white 
  quartz 
  sand 
  8 
  ft. 
  thick 
  

   lies 
  above 
  this 
  conglomerate. 
  Almost 
  nothing 
  of 
  the 
  salt-works 
  

   that 
  once 
  were 
  in 
  operation 
  a 
  mile 
  or 
  so 
  farther 
  up 
  stream 
  could 
  

   be 
  found. 
  It 
  appears 
  that 
  some 
  of 
  the 
  wells 
  were 
  in 
  the 
  bed 
  of 
  

   the 
  bayou. 
  One 
  old 
  shaft 
  was 
  seen 
  on 
  the 
  left 
  bank. 
  

  

  According 
  to 
  Mr. 
  Dan'l 
  Vandegaer 
  the 
  process 
  of 
  obtaining 
  

   salt 
  here 
  was 
  usually 
  as 
  follows 
  : 
  Hollow 
  cypress 
  logs 
  were 
  sunk 
  

  

  