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  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  masses 
  of 
  salt 
  separated 
  by 
  beds 
  of 
  clay, 
  marl 
  and 
  anhydrite.* 
  

   The 
  rock 
  salt 
  of 
  the 
  salt 
  range 
  of 
  India, 
  the 
  only 
  other 
  deposit 
  

   which 
  can 
  compare 
  with 
  the 
  Louisiana 
  beds 
  in 
  thickness, 
  is 
  

   associated 
  with 
  beds 
  of 
  clay 
  ; 
  the 
  aggregate 
  thickness 
  of 
  the 
  

   whole 
  averaging 
  300 
  to 
  700 
  feet 
  and 
  not 
  exceeding 
  i,2oo.f 
  

  

  It 
  would 
  seem 
  that 
  according 
  to 
  thickness 
  and 
  purity 
  the 
  

   Louisiana 
  salt 
  beds 
  rank 
  third 
  and 
  possibly 
  second 
  in 
  the 
  great 
  

   salt 
  deposits 
  of 
  the 
  world. 
  

  

  * 
  Elements 
  of 
  Chemical 
  and 
  Physical 
  Geology 
  by 
  Gustav 
  Rischof, 
  London 
  

   1854, 
  vol. 
  I, 
  p. 
  383. 
  Quotes 
  Zeuchner 
  in 
  Jahrbuch 
  fiir 
  Mineralogie, 
  etc., 
  

   1844. 
  p. 
  527. 
  

  

  * 
  Earthy 
  and 
  Other 
  Minerals 
  and 
  Mining 
  by 
  D. 
  C. 
  Davies, 
  London, 
  1888, 
  

   p 
  86. 
  

  

  f 
  Memoirs 
  of 
  Geol. 
  Surv. 
  of 
  India, 
  vol. 
  2. 
  "The 
  Trans-Indus 
  Salt 
  Region," 
  

   by 
  A. 
  B. 
  Wynne. 
  Quoted 
  by 
  Davies 
  in 
  Earthy 
  Minerals 
  and 
  Mining, 
  p. 
  93. 
  

  

  