﻿ni] 
  Shreveport 
  Area: 
  Lakes 
  183 
  

  

  to 
  form 
  rapids 
  in 
  the 
  channel. 
  The 
  rapids 
  are 
  gradually 
  wear- 
  

   ing 
  backward 
  and 
  the 
  day 
  is 
  not 
  far 
  distant 
  when 
  Caddo 
  parish 
  

   will 
  be 
  the 
  richer 
  by 
  a 
  number 
  of 
  acres 
  of 
  good 
  land 
  where 
  

   there 
  is 
  now 
  a 
  lake. 
  

  

  It 
  is 
  believed 
  that 
  the 
  ancient 
  channel 
  at 
  Big 
  Willow 
  pass 
  is 
  

   also 
  to 
  the 
  north 
  and 
  that 
  the 
  blue 
  clay 
  will 
  finally, 
  after 
  the 
  

   Albany 
  rapids 
  have 
  worn 
  out 
  and 
  drained 
  Sodo 
  lake, 
  wear 
  back 
  

   and 
  drain 
  Ferry 
  lake. 
  

  

  The 
  rapids 
  on 
  Bowman's 
  chute 
  are 
  of 
  exactly 
  the 
  same 
  type, 
  

   were 
  formed 
  in 
  the 
  same 
  way 
  and 
  will 
  have 
  same 
  life 
  history. 
  

  

  The 
  falls 
  at 
  Dooley's 
  bayou 
  are 
  slightly 
  different 
  from 
  those 
  

   just 
  described. 
  It 
  seems 
  that 
  as 
  the 
  raft 
  advanced 
  up 
  the 
  river 
  

   the 
  little 
  ditch 
  which 
  drained 
  the 
  old 
  Dooley's 
  swamp 
  offered 
  a 
  

   good 
  outlet 
  channel 
  ; 
  water 
  rushed 
  through 
  it 
  and 
  tumbled 
  over 
  

   the 
  bank 
  of 
  Old 
  Red 
  bayou. 
  The 
  falls 
  thus 
  formed 
  wore 
  back 
  

   until 
  the 
  blue 
  clay 
  was 
  reached 
  when 
  a 
  rapids 
  was 
  produced. 
  

   A 
  portion 
  of 
  the 
  water 
  turned 
  over 
  the 
  old 
  Hamilton 
  fields 
  and 
  

   fell 
  into 
  Old 
  Red 
  bayou. 
  Here 
  there 
  was 
  a 
  layer 
  of 
  hard 
  clay 
  

   underlaid 
  by 
  softer 
  clay, 
  the 
  exact 
  conditions 
  for 
  a 
  typical 
  water- 
  

   fall, 
  and 
  as 
  the 
  under 
  sand 
  washed 
  out 
  portions 
  of 
  the 
  clay 
  strata 
  

   broke 
  off, 
  thus 
  maintaining 
  a 
  perpendicular 
  fall. 
  

  

  At 
  Silver 
  lake 
  the 
  old 
  channel 
  was 
  to 
  the 
  south 
  of 
  the 
  present 
  

   outlet. 
  The 
  filling 
  of 
  this 
  resulted 
  in 
  the 
  tumbling 
  of 
  the 
  water 
  

   over 
  the 
  bank 
  at 
  a 
  place 
  occupied 
  by 
  a 
  projecting 
  point 
  of 
  the 
  

   Eocene 
  clays. 
  A 
  waterfall 
  resulted 
  whose 
  height 
  has 
  been 
  

   increased 
  by 
  the 
  deepening 
  of 
  the 
  main 
  channel 
  of 
  the 
  river. 
  

   The 
  fall 
  is 
  wearing 
  back 
  by 
  the 
  removal 
  of 
  the 
  lower 
  layers 
  by 
  

   the 
  water 
  and 
  the 
  caving 
  off 
  of 
  the 
  upper 
  strata 
  and 
  will 
  soon 
  

   reach 
  and 
  destroy 
  Silver 
  lake. 
  

  

  Origin 
  of 
  Bottom 
  Lakes 
  

  

  Classes. 
  — 
  With 
  reference 
  to 
  origin, 
  there 
  seems 
  to 
  be 
  three 
  

   types 
  of 
  lakes 
  in 
  the 
  bottoms, 
  viz. 
  : 
  

  

  1. 
  Cut-off 
  lakes. 
  

  

  2. 
  Lakes 
  of 
  enclosure. 
  

  

  3. 
  Raft 
  lakes. 
  

  

  Cut-off 
  or 
  Horseshoe 
  lakes. 
  — 
  Lakes 
  of 
  this 
  type 
  are 
  not 
  well 
  

   developed 
  in 
  this 
  part 
  of 
  the 
  valley, 
  not 
  nearly 
  so 
  well 
  as 
  they 
  

  

  