﻿Ill] 
  

  

  Shrkveport 
  Area 
  : 
  Tertiary 
  

  

  19: 
  

  

  f>' 
  

  

  p. 
  

  

  a.' 
  

  

  

  !0 
  

  

  lb' 
  

  

  U 
  i- 
  

  

  

  ■" 
  c 
  > 
  

  

  = 
  ca 
  ■* 
  

  

  > 
  ^- 
  >, 
  

  

  •^ 
  f- 
  f 
  

  

  •" 
  o 
  OJ 
  

  

  ^ 
  1- 
  c 
  

  

  fc/5 
  HI 
  i- 
  V 
  

  

  ^ 
  

  

  5 
  

  

  S 
  > 
  I' 
  

  

  ^ 
  si 
  *-* 
  

  

  p 
  , 
  \j 
  CO 
  

  

  ^ 
  ♦; 
  j; 
  

  

  S> 
  ."^ 
  -^ 
  

  

  K 
  •*» 
  -r 
  

  

  <3 
  

  

  •s- 
  

  

  I 
  

  

  W-5 
  

  

  3. 
  Lignite 
  2 
  ft. 
  

  

  2. 
  Gray 
  and 
  yellow 
  sand 
  with 
  fine 
  

  

  blue 
  clay 
  layers. 
  Leaves. 
  . 
  3 
  ft. 
  

   I 
  . 
  Gray 
  and 
  yellow, 
  more 
  and 
  less 
  

   laminated 
  sand 
  with 
  thin 
  la- 
  

   mellae 
  of 
  blue 
  claj' 
  to 
  water 
  

  

  level 
  13 
  ft. 
  

  

  In 
  a 
  gully 
  about 
  one-fourth 
  of 
  a 
  mile 
  

   south 
  of 
  the 
  Slaughter 
  Pen 
  bluff 
  twenty 
  

   feet 
  of 
  gray 
  or 
  bluish 
  gray 
  laminated 
  

   clays 
  overlaid 
  by 
  15 
  feet 
  of 
  stratified 
  

   yellow 
  clays 
  are 
  exposed. 
  The 
  gray 
  

   clays, 
  like 
  the 
  yellow 
  clays 
  at 
  the 
  top 
  of 
  

   the 
  Slaughter 
  Pen 
  bluff 
  section, 
  contain 
  

   thin 
  plates 
  of 
  calcareous 
  matter. 
  The 
  

   lower 
  clays 
  show 
  several 
  streaks 
  of 
  dark 
  

   lignitic 
  clay 
  two 
  to 
  eight 
  inches 
  thick. 
  

   This 
  seems 
  to 
  represent 
  the 
  upper 
  part 
  

   of 
  Johnson's 
  section. 
  

  

  About 
  two 
  hundred 
  yards 
  south 
  of 
  the 
  

  

  4 
  section 
  shown 
  in 
  the 
  photograph 
  there 
  

  

  5 
  is 
  a 
  small 
  but 
  extremely 
  distinct 
  fault 
  

   x 
  in 
  the 
  lignite 
  layer. 
  It 
  is 
  probably 
  due 
  

   ? 
  to 
  local 
  earth 
  shocks. 
  The 
  fault 
  shows 
  

  

  o 
  

  

  •^ 
  one 
  rather 
  peculiar 
  feature, 
  the 
  down- 
  

   °. 
  ward 
  displacement 
  of 
  a 
  portion 
  of 
  the 
  

   g 
  |. 
  lower 
  lignite 
  along 
  the 
  fault 
  line. 
  

   £ 
  «"£ 
  Normally 
  this 
  should 
  turn 
  up 
  instead 
  

   "B 
  ^.^ 
  ;; 
  of 
  down. 
  Its 
  present 
  shape 
  could 
  be 
  

   ^ 
  «§)- 
  produced 
  by 
  a 
  double 
  movement 
  along 
  

   ^ 
  >, 
  s 
  ^ 
  the 
  fault 
  line, 
  that 
  is 
  a 
  movement 
  down- 
  

  

  p^ 
  CO 
  ^ 
  w^ 
  

  

  iT'^g^ward 
  and 
  then 
  a 
  movement 
  upward. 
  

   g-l-cig 
  If 
  the 
  fault 
  at 
  its 
  formation 
  gaped 
  open 
  

   ^'%^-^ 
  slightly 
  the 
  layers 
  in 
  the 
  overhanging 
  

   o 
  5h 
  portion 
  would 
  gradually 
  settle 
  down 
  

   • 
  . 
  . 
  producing 
  the 
  appearance 
  shown 
  in 
  the 
  

  

  a 
  

  

  figure. 
  

  

  