﻿I] 
  Historical 
  Review 
  : 
  Third 
  Period 
  41 
  

  

  "Jackson" 
  beds 
  are 
  represented 
  in 
  a 
  section 
  " 
  No. 
  13," 
  as 
  

   overlying 
  " 
  upper 
  lignitic 
  " 
  beds 
  and 
  the 
  latter 
  in 
  turn 
  are 
  

   shown 
  to 
  overlie 
  the 
  " 
  Claiborne 
  formation." 
  

  

  Unfortunately 
  the 
  "Jackson" 
  localities 
  given 
  are 
  ill-defined, 
  or 
  

   belong 
  to 
  the 
  Lower 
  Claiborne 
  stage. 
  

  

  The 
  " 
  Vicksburg 
  " 
  sections 
  given 
  on 
  p. 
  93. 
  are 
  Jackson 
  (see 
  

   "No. 
  15 
  " 
  and 
  " 
  No. 
  16"). 
  

  

  The 
  "Grand 
  Gulf" 
  rocks 
  are 
  described 
  and 
  illustrated 
  on 
  

   pp. 
  94-98. 
  

  

  The 
  " 
  Red 
  Sandy 
  Clays 
  " 
  of 
  northern 
  Louisiana 
  are 
  said 
  to 
  

   have 
  been 
  deposited 
  at 
  the 
  close 
  of 
  the 
  Tertiary. 
  

  

  Next, 
  "The 
  Sands 
  and 
  Gravel 
  of 
  the 
  Drift 
  " 
  are 
  described 
  ; 
  

   and, 
  finally, 
  the 
  "Alluvium 
  " 
  is 
  discussed. 
  

  

  Under 
  Economic 
  Geology 
  the 
  waters 
  examined 
  are 
  described. 
  

  

  Under 
  " 
  Useful 
  Minerals 
  " 
  the 
  analyses 
  of 
  10 
  marls 
  are 
  given 
  ; 
  

   and 
  gypsum 
  and 
  limestones 
  are 
  discussed. 
  

  

  Under 
  " 
  Other 
  Minerals 
  of 
  Economic 
  Value 
  " 
  are 
  placed 
  

   Building 
  stones. 
  Gravels, 
  Iron, 
  Clay, 
  Kaolin, 
  Salt, 
  Lignite 
  ; 
  of 
  

   the 
  latter 
  4 
  analyses 
  are 
  given. 
  " 
  Soils 
  of 
  Northern 
  Louisiana 
  " 
  

   are 
  discussed 
  and 
  45 
  analyses 
  are 
  given. 
  

  

  The 
  "Botanical 
  Notes 
  " 
  by 
  Vaughan 
  and 
  Tracy 
  are 
  an 
  

   important 
  and 
  interesting 
  feature 
  of 
  the 
  report. 
  

  

  Harris. 
  — 
  While 
  engaged 
  on 
  the 
  Tertiary 
  of 
  southern 
  Arkan- 
  

   sas, 
  this 
  author 
  made 
  a 
  short 
  visit 
  to 
  the 
  Bossier 
  and 
  Claiborne 
  

   parishes 
  of 
  this 
  State 
  to 
  see 
  what 
  help 
  in 
  the 
  classification 
  of 
  

   deposits 
  in 
  Arkansas 
  might 
  be 
  derived 
  from 
  fossiliferous 
  sections 
  

   farther 
  south. 
  The 
  results 
  of 
  this 
  trip 
  were 
  embodied 
  in 
  one 
  of 
  

   the 
  Arkansas 
  Annual 
  Reports.* 
  

  

  A 
  detailed 
  section 
  at 
  Roberta, 
  and 
  at 
  the 
  Pope 
  Joy 
  cut 
  are 
  

   given. 
  Various 
  fossiliferous 
  localities 
  are 
  mentioned. 
  

  

  From 
  the 
  fossils 
  collected 
  by 
  Johnson 
  and 
  deposited 
  in 
  the 
  

   U. 
  S. 
  Nat. 
  Museum 
  this 
  author 
  was 
  able 
  to 
  correlate 
  the 
  

   St. 
  Maurice 
  beds 
  as 
  Lower 
  Claiborne. 
  

  

  A 
  list 
  of 
  Jackson 
  fossils 
  from 
  Montgomery 
  follows 
  ; 
  the 
  

   chapter 
  closes 
  with 
  a 
  brief 
  history 
  of 
  the 
  Zeiiglodon 
  locality 
  on 
  

   Ouachita 
  river. 
  

  

  *Arkansas 
  Geological 
  Survey, 
  Annual 
  Report, 
  1892, 
  vol. 
  2 
  (publ. 
  1894), 
  

   by 
  Gilbert 
  D. 
  Harris, 
  8vo. 
  207 
  pp., 
  plates, 
  map. 
  See 
  Chapter 
  VIII. 
  

  

  