﻿i6 
  Geoi<ogical 
  Survey 
  of 
  Louisiana 
  [Sect, 
  

  

  Richard 
  Delafield 
  in 
  1829. 
  Their 
  life 
  history 
  is 
  also 
  fully 
  

   described. 
  

  

  An 
  examination 
  in 
  the 
  early 
  part 
  of 
  the 
  same 
  year 
  by 
  Bernard 
  

   and 
  Poussin 
  resulted 
  in 
  a 
  very 
  brief 
  description 
  of 
  the 
  character 
  

   of 
  the 
  material 
  thrown 
  out 
  of 
  the 
  lumps.* 
  

  

  Harlan. 
  — 
  The 
  first 
  contribution 
  to 
  the 
  systematic 
  geology 
  of 
  

   the 
  State 
  may 
  be 
  regarded 
  as 
  Article 
  XII 
  in 
  the 
  Transactions 
  of 
  

   the 
  American 
  Philosophical 
  Society, 
  vol. 
  4, 
  New 
  Series, 
  1832, 
  

   p. 
  397, 
  et 
  seq., 
  entitled 
  " 
  Notice 
  of 
  Fossil 
  Bones 
  found 
  in 
  the 
  

   Tertiary 
  Formation 
  of 
  the 
  State 
  of 
  Louisiana. 
  By 
  Richard 
  

   Harlan, 
  M.D., 
  etc. 
  Read 
  October 
  19, 
  1832." 
  

  

  Dr. 
  Harlan 
  here 
  describes 
  some 
  of 
  the 
  large 
  fossil 
  bones 
  sent 
  

   him 
  by 
  Judge 
  Bry 
  " 
  found 
  on 
  the 
  Ouachita 
  river 
  in 
  the 
  state 
  of 
  

   Louisiana, 
  at 
  a 
  distance 
  (south) 
  of 
  about 
  fifty 
  miles 
  by 
  land, 
  

   and 
  one 
  hundred 
  and 
  ten 
  by 
  water 
  from 
  the 
  town 
  of 
  Monroe, 
  in 
  

   the 
  parish 
  of 
  Ouachita, 
  and 
  in 
  lat. 
  31° 
  46' 
  or 
  48'." 
  

  

  Judge 
  Bry's 
  comments 
  on 
  the 
  geology 
  of 
  northern 
  Louisiana 
  are 
  

   as 
  follows 
  : 
  " 
  The 
  hills, 
  beginning 
  at 
  Cataouta, 
  extend 
  north 
  to 
  

   the 
  Arkansas 
  river 
  and 
  west 
  to 
  Red 
  river, 
  whence 
  they 
  spread 
  

   to 
  the 
  Sabine. 
  Through 
  that 
  country 
  are 
  interspersed 
  over- 
  

   flowed 
  lands 
  varying 
  in 
  extent 
  according 
  to 
  the 
  magnitude 
  of 
  

   the 
  creeks, 
  of 
  which 
  they 
  form 
  the 
  bank 
  at 
  low 
  water, 
  and 
  which 
  

   flow 
  over 
  them 
  at 
  high 
  water. 
  In 
  these 
  hills 
  very 
  few 
  ores 
  are 
  

   found 
  except 
  those 
  of 
  iron, 
  which 
  are 
  abundant 
  in 
  two 
  different 
  

   places 
  ; 
  but 
  no 
  measures 
  have 
  been 
  taken 
  to 
  ascertain 
  their 
  

   value. 
  The 
  highest 
  of 
  the 
  hills 
  do 
  not 
  exceed 
  eight 
  hundred 
  

   feet 
  above 
  high 
  water 
  mark 
  ; 
  and 
  in 
  many 
  places 
  they 
  dwindle 
  

   into 
  gently 
  rolling 
  ground. 
  ' 
  These 
  hills 
  appear 
  to 
  be 
  of 
  a 
  much 
  

   more 
  ancient 
  formation 
  than 
  the 
  lower 
  section 
  of 
  Louisiana. 
  

   No 
  rocks, 
  however, 
  enter 
  into 
  their 
  composition 
  ; 
  but 
  a 
  few 
  

   sandy 
  stones 
  and 
  pebbles, 
  nearly 
  all 
  siliceous, 
  are 
  occasionally 
  

   seen 
  scattered 
  on 
  their 
  summits, 
  or 
  in 
  the 
  beds 
  of 
  the 
  numerous 
  

   creeks 
  fed 
  by 
  springs 
  issuing 
  from 
  them. 
  

  

  ' 
  ' 
  Sea 
  shells 
  are 
  discovered 
  in 
  several 
  places 
  ; 
  I 
  found 
  them 
  

   on 
  the 
  highest 
  ridge 
  which 
  divides 
  the 
  waters 
  running 
  into 
  the 
  

   Red 
  river 
  from 
  the 
  tributary 
  streams 
  of 
  the 
  Ouachita. 
  The 
  

   tract, 
  by 
  far 
  the 
  richest 
  in 
  calcareous 
  substances, 
  is 
  the 
  one 
  

  

  *22d 
  Cong. 
  1st 
  Sess., 
  House 
  Ex. 
  Doc, 
  vol. 
  4, 
  No. 
  185, 
  1832. 
  

  

  