﻿32 
  GEOI.OGICAL 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  State 
  of 
  Mississippi, 
  lean 
  satisfy 
  Dr. 
  Meyer's 
  postulate 
  of 
  'seeing 
  

   Vicksburg 
  rocks 
  actually 
  superimposed 
  upon 
  the 
  Jackson 
  strata. 
  ' 
  

   I 
  have 
  seen 
  this 
  in 
  Louisiana 
  on 
  the 
  Bayou 
  Funne 
  Louis, 
  where 
  

   I 
  have 
  stood 
  on 
  a 
  ledge 
  of 
  Vicksburg 
  limestone 
  showing 
  a 
  south- 
  

   ward 
  dip 
  and 
  containing 
  abundance 
  of 
  Orbitoides, 
  Area 
  niissis- 
  

   sippiensis 
  and 
  Pecten 
  poulsoni, 
  looking 
  down 
  upon 
  a 
  level 
  prairie 
  

   country 
  in 
  which 
  the 
  bones 
  of 
  the 
  Zeuglodon 
  have 
  been 
  plowed 
  

   up. 
  ' 
  ' 
  

  

  In 
  1887 
  Hilgard 
  contributed 
  to 
  Science*, 
  an 
  article 
  entitled, 
  

   " 
  The 
  Equivalence 
  in 
  Time 
  of 
  American 
  Marine 
  and 
  Intra-con- 
  

   tinental 
  Terranes. 
  " 
  Herein 
  the 
  following 
  significant 
  passage 
  

   occurs 
  : 
  ' 
  ' 
  The 
  striking 
  increase 
  of 
  the 
  lignitiferous 
  facies 
  

   toward 
  the 
  northwestern 
  border 
  of 
  the 
  Gulf 
  Tertiary 
  area, 
  culmi- 
  

   nating 
  in 
  the 
  appearance 
  of 
  bands 
  of 
  fresh-water 
  limestone 
  at 
  

   Mansfield 
  and 
  northwestward 
  ; 
  the 
  fan-like 
  expanse 
  in 
  Arkansas 
  

   and 
  Louisiana 
  of 
  the 
  older 
  portion 
  of 
  the 
  narrow 
  bands 
  formed 
  

   by 
  the 
  marine 
  stages 
  in 
  Mississippi 
  and 
  Alabama 
  with 
  a 
  mani- 
  

   fest 
  northwestern 
  trend 
  of 
  such 
  deposits 
  as 
  are 
  continuosly 
  

   traceable 
  in 
  northwestern 
  Louisiana, 
  while 
  the 
  later 
  stages 
  are 
  

   abruptly 
  deflected 
  to 
  the 
  southwest, 
  all 
  points 
  to 
  a 
  rapidly 
  pro- 
  

   gressing 
  elevation 
  of 
  the 
  axial 
  Cretaceous 
  trough 
  that 
  may 
  or 
  

   may 
  not 
  have 
  completely 
  separated 
  the 
  interior 
  from 
  the 
  gulf 
  

   waters 
  before 
  the 
  beginning 
  of 
  the 
  Tertiary 
  period." 
  

  

  Hopkins. 
  — 
  In 
  1869 
  Dr. 
  F. 
  V. 
  Hopkins 
  made 
  three 
  geological 
  

   trips 
  in 
  northern 
  Louisiana 
  and 
  submitted 
  his 
  first 
  annual 
  report 
  

   on 
  the 
  region 
  covered 
  late 
  in 
  the 
  same 
  year. 
  In 
  this 
  report 
  he 
  

   reviewed 
  the 
  different 
  geological 
  formations 
  occurring 
  in 
  the 
  

   State 
  from 
  the 
  oldest 
  or 
  Cretaceous 
  to 
  the 
  most 
  recent 
  or 
  allu- 
  

   vial 
  formation. 
  

  

  His 
  ideas 
  of 
  the 
  stratigraphy 
  of 
  the 
  State 
  along 
  a 
  line 
  ' 
  'passing 
  

   north 
  through 
  the 
  Cretaceous 
  outcrop 
  in 
  Winn 
  and 
  then 
  turning 
  

   a 
  little 
  southeast 
  to 
  intersect 
  the 
  St. 
  Landry 
  limestone, 
  and 
  the 
  

   islands 
  in 
  the 
  sea-marsh," 
  is 
  shown 
  in 
  the 
  following 
  figure 
  : 
  

  

  *Vol. 
  9, 
  p. 
  535, 
  1887. 
  

  

  