﻿Ill] 
  Shrveport 
  Area 
  : 
  Tertiary 
  199 
  

  

  formity 
  was 
  formed 
  in 
  the 
  earl}^ 
  part 
  of 
  the 
  Lower 
  Claiborne 
  

   stage. 
  This 
  coudusion 
  is 
  strengthened 
  by 
  a 
  greatly 
  disarranged 
  

   exposure 
  seen 
  in 
  a 
  railroad 
  cut 
  about 
  four 
  miles 
  south 
  of 
  Many. 
  

   Here 
  the 
  disturbed 
  material, 
  which 
  contains 
  Lower 
  Claiborne 
  

   fossils, 
  lies 
  between 
  undisturbed 
  fossiliferous 
  Lower 
  Clair 
  borne 
  

   beds 
  and 
  fossiliferous 
  Lignitic 
  beds. 
  

  

  Sands. 
  — 
  There 
  are 
  few 
  facts 
  bearing 
  on 
  the 
  age 
  of 
  the 
  upper 
  

   yellow 
  and 
  red 
  sands 
  about 
  Shreveport 
  and 
  in 
  the 
  absence 
  of 
  the 
  

   same 
  there 
  seems 
  to 
  be 
  no 
  reason 
  for 
  considering 
  them 
  separate 
  

   from 
  the 
  lower 
  Tertiary 
  beds. 
  The 
  sand 
  beds 
  are 
  well 
  developed 
  

   on 
  the 
  Spring 
  tract 
  east 
  of 
  the 
  City 
  park. 
  In 
  the 
  street 
  car 
  cut 
  

   they 
  are 
  seen 
  underlying 
  horizontally 
  stratified 
  gray 
  clays 
  con- 
  

   taining 
  good 
  leaf 
  impressions. 
  Very 
  similar 
  sands 
  are 
  exposed 
  

   in 
  the 
  Union 
  depot 
  cuts 
  under 
  lignite 
  and 
  gray 
  clay. 
  These 
  

   sands 
  contain 
  numerous 
  pieces 
  of 
  silicified 
  wood. 
  No 
  gravel 
  of 
  

   northern 
  origin 
  was 
  seen 
  in 
  any 
  place 
  over 
  the 
  hills. 
  

  

  The 
  ice 
  factory 
  well. 
  — 
  The 
  following 
  letter 
  has 
  been 
  received 
  

   from 
  Mr. 
  F. 
  J. 
  Lukins 
  of 
  the 
  American 
  Well 
  Works 
  who 
  had 
  

   charge 
  of 
  the 
  drilling 
  of 
  the 
  deep 
  ice 
  factory 
  well 
  : 
  " 
  I 
  had 
  charge 
  

   of 
  the 
  deep 
  well 
  that 
  was 
  sunk 
  at 
  Shreveport, 
  but 
  it 
  has 
  been 
  so 
  

   long 
  ago 
  that 
  we 
  have 
  no 
  record 
  here 
  now 
  as 
  to 
  the 
  different 
  for- 
  

   mations. 
  You 
  can 
  perhaps 
  get 
  from 
  local 
  well 
  drillers, 
  the 
  

   nature 
  of 
  the 
  formation 
  to 
  450 
  feet. 
  At 
  that 
  depth 
  we 
  passed 
  

   through 
  a 
  sand 
  rock 
  formation. 
  It 
  was 
  very 
  fine 
  and 
  not 
  very 
  

   hard, 
  and 
  contained 
  considerable 
  water. 
  We 
  made 
  a 
  well 
  at 
  the 
  

   Shreveport 
  Junction 
  in 
  this 
  formation, 
  and 
  got 
  a 
  good 
  supply 
  

   from 
  that 
  stratum. 
  The 
  sandstone 
  formation 
  was 
  about 
  50 
  feet 
  

   thick. 
  From 
  there 
  to 
  971 
  feet, 
  it 
  was 
  a 
  sort 
  of 
  blue 
  clay 
  for- 
  

   mation 
  with 
  occasional 
  very 
  hard 
  streaks 
  of 
  thin 
  shelly 
  rock. 
  

   This 
  rock 
  itself 
  was 
  very 
  thin, 
  perhaps 
  one-half 
  to 
  one 
  inch 
  in 
  

   thickness, 
  but 
  there 
  would 
  be 
  several 
  layers 
  together, 
  which 
  

   would 
  make 
  up 
  a 
  thickness 
  of 
  from 
  6 
  to 
  12 
  in. 
  At 
  one 
  point, 
  

   I 
  think 
  about 
  600 
  feet, 
  we 
  passed 
  through 
  a 
  stratum 
  of 
  pyrites 
  of 
  

   iron, 
  which 
  was 
  about 
  14 
  in. 
  in 
  thickness. 
  We 
  could 
  not 
  tell 
  

   whether 
  this 
  formation 
  was 
  solid, 
  or 
  whether 
  it 
  was 
  a 
  collection 
  

   of 
  small 
  pieces 
  packed 
  together. 
  However, 
  I 
  procured 
  one 
  

   specimen 
  which 
  was 
  spherical 
  in 
  shape, 
  and 
  about 
  one-half 
  inch 
  

   in 
  diameter, 
  and 
  it 
  appeared 
  from 
  it, 
  that 
  it 
  must 
  be 
  a 
  collection 
  

  

  