﻿56 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  through 
  in 
  the 
  deep 
  well 
  was 
  of 
  Cretaceous 
  origin. 
  Doubtless, 
  

   too, 
  some 
  of 
  the 
  shallower 
  wells 
  reached 
  the 
  same 
  formation 
  ; 
  but 
  

   as 
  yet, 
  no 
  positive 
  proofs 
  of 
  the 
  age 
  of 
  the 
  various 
  strata 
  are 
  at 
  

   hand. 
  

  

  Winnfield 
  limestone 
  : 
  SS. 
  ip 
  and 
  jo, 
  ii 
  N.,j 
  IV. 
  (according 
  

   to 
  Lerch). 
  — 
  Perhaps 
  there 
  is 
  no 
  locality 
  in 
  northern 
  Louisiana 
  

   that 
  can 
  excel 
  this 
  in 
  features 
  of 
  interest, 
  for 
  the 
  geologist 
  and 
  

   layman 
  alike. 
  Nor 
  is 
  it 
  a 
  matter 
  of 
  wonder 
  that 
  great 
  local 
  inter- 
  

   est 
  should 
  be 
  manifest 
  in 
  this 
  high 
  mass 
  of 
  dislocated, 
  faulted, 
  

   folded 
  rocks, 
  showing 
  here 
  a 
  mere 
  confused 
  mass 
  of 
  angular 
  

   boulders, 
  there 
  a 
  vertical 
  clifF 
  of 
  30 
  feet 
  with 
  rocks 
  of 
  all 
  shapes 
  

   and 
  sizes 
  piled 
  up 
  in 
  a 
  sloping 
  talus 
  at 
  its 
  base. 
  The 
  "Tower 
  

   rock" 
  or 
  "Chimney" 
  is 
  well 
  shown 
  on 
  PI. 
  i. 
  The 
  rugged, 
  

   fractured 
  character 
  of 
  the 
  cliff 
  at 
  this 
  place 
  is 
  also 
  well 
  illustrated. 
  

   Below 
  the 
  sloping 
  talus, 
  to 
  the 
  left 
  of 
  the 
  picture 
  is 
  a 
  small 
  pond 
  

   occupying 
  a 
  central 
  or 
  crater 
  -like 
  area 
  of 
  the 
  upheaval 
  that 
  

   brought 
  up 
  these 
  rocks 
  from 
  beneath 
  the 
  Tertiary 
  strata. 
  

  

  The 
  number, 
  relative 
  importance 
  and 
  positions 
  of 
  the 
  various 
  

   limestone 
  outcrops 
  of 
  this 
  region 
  are 
  shown 
  on 
  the 
  accompany- 
  

   ing 
  topographic 
  sketch, 
  (Fig. 
  3) 
  made 
  by 
  this 
  survey 
  early 
  in 
  

   the 
  season. 
  

  

  On 
  the 
  western 
  end 
  of 
  the 
  high 
  bluff 
  in 
  the 
  center 
  of 
  the 
  map 
  

   the 
  ledges 
  seem 
  to 
  dip 
  in 
  a 
  northerly 
  direction. 
  But 
  farther 
  east 
  

   they 
  dip 
  eastward. 
  Other 
  outcrops 
  to 
  the 
  left 
  of 
  the 
  center 
  of 
  

   the 
  map 
  have 
  a 
  northerly 
  or 
  rather 
  northwesterly 
  dip 
  of 
  from 
  30° 
  

   to 
  45.° 
  The 
  chimney 
  seems 
  to 
  be 
  composed 
  of 
  nearly 
  horizontal 
  

   layers. 
  

  

  The 
  position 
  of 
  the 
  other 
  outcrops 
  together 
  with 
  what 
  dips 
  

   have 
  been 
  ascertained 
  seem 
  to 
  indicate 
  that 
  there 
  is 
  here 
  an 
  

   irregular 
  anticlinal 
  fold 
  extending 
  in 
  a 
  northeast 
  and 
  southwest 
  

   direction 
  ; 
  that 
  the 
  greatest 
  energy 
  in 
  the 
  upheaving 
  force 
  took 
  

   effect 
  not 
  far 
  east 
  of 
  the 
  "chimney," 
  and 
  about 
  in 
  the 
  present 
  

   Bayou 
  channel 
  ; 
  that 
  the 
  axis 
  there 
  divided 
  and 
  the 
  upheaval 
  of 
  

   the 
  eastern 
  outcrop 
  was 
  one 
  result 
  and 
  the 
  outcrops 
  west 
  of 
  the 
  

   Bayou 
  to 
  the 
  north 
  was 
  another. 
  

  

  The 
  general 
  trend 
  of 
  the 
  various 
  outcrops 
  is 
  towards 
  the 
  

   Coochie 
  brake 
  west 
  of 
  Atlanta, 
  discussed 
  below. 
  

  

  Hilgard 
  says 
  briefly 
  regarding 
  the 
  dislocations 
  here 
  shown 
  : 
  

  

  