﻿62 
  Jillson 
  — 
  Migration 
  of 
  Headwaters 
  

  

  Eight 
  Middle 
  Creek 
  valley 
  is 
  V-shaped 
  and 
  in 
  some 
  places 
  

   the 
  walls 
  of 
  the 
  creek 
  are 
  nearly 
  vertical. 
  There 
  is 
  

   scarcely 
  any 
  " 
  bottom 
  land," 
  the 
  hills 
  are 
  high 
  and 
  steep, 
  

   and 
  the 
  drainage 
  is 
  perfect. 
  Erosive 
  forces 
  are 
  actively 
  

   engaged. 
  

  

  4. 
  Between 
  Ivyton 
  and 
  Brainard, 
  Right 
  Middle 
  Creek 
  

   is 
  bordered 
  by 
  imperfect 
  terraces 
  developed 
  on 
  a 
  strong 
  

   sandstone 
  member 
  of 
  the 
  Pottsville 
  series, 
  through 
  which 
  

   the 
  Right 
  Middle 
  Fork 
  has 
  cut. 
  Probably 
  this 
  sandstone 
  

   formed 
  at 
  one 
  time 
  the 
  floor 
  of 
  the 
  headwaters 
  of 
  the 
  

   Burning 
  Fork 
  which 
  were 
  too 
  feeble 
  to 
  cut 
  through 
  it 
  and 
  

   meandered 
  back 
  and 
  forth 
  across 
  it 
  carving 
  out 
  a 
  wide, 
  

   flat 
  valley 
  at 
  a 
  high 
  elevation. 
  Toward 
  Brainard 
  the 
  

   terraces 
  gradually 
  become 
  less 
  distinct 
  and 
  finally 
  dis- 
  

   appear. 
  

  

  5. 
  Within 
  the 
  shaded 
  area 
  the 
  channel 
  of 
  Right 
  Middle 
  

   Creek 
  is 
  choked 
  with 
  gravel 
  and 
  bowlders. 
  The 
  stream 
  

   is 
  still 
  degrading 
  rapidly. 
  

  

  6. 
  The 
  topography 
  of 
  Middle 
  Creek 
  changes 
  abruptly 
  

   iy 
  2 
  miles 
  below 
  Brainard. 
  At 
  A 
  the 
  valley 
  broadens, 
  the 
  

   hills 
  become 
  lower, 
  the 
  wagon 
  road 
  comes 
  up 
  out 
  of 
  the 
  

   creek 
  to 
  find 
  bottom 
  land 
  on 
  either 
  side, 
  and 
  the 
  stream 
  

   meanders 
  back 
  and 
  forth 
  in 
  a 
  slightly 
  aggraded 
  valley 
  

   floor 
  of 
  sandy 
  loam. 
  

  

  7. 
  From 
  A 
  to 
  the 
  mouth 
  of 
  the 
  stream, 
  all 
  tributaries 
  

   come 
  into 
  the 
  main 
  channel 
  at 
  an 
  acute 
  angle 
  with 
  the 
  

   current. 
  The 
  hills 
  have 
  an 
  older, 
  rounded-off 
  , 
  and 
  worn- 
  

   down 
  appearance, 
  and 
  the 
  broadened, 
  level, 
  slightly 
  

   aggraded 
  floor 
  indicates 
  an 
  excess 
  of 
  eroded 
  material 
  

   from 
  the 
  headwaters. 
  No 
  trace 
  of 
  terracing 
  remains. 
  

  

  Migration 
  has 
  also 
  taken 
  place 
  near 
  the 
  headwaters 
  of 
  

   Jenny 
  Creek. 
  From 
  Riceville 
  southwestward 
  Jenny 
  

   Creek 
  has 
  cut 
  through 
  a 
  thick 
  sandstone 
  member 
  of 
  the 
  

   Pottsville 
  and 
  has 
  developed 
  a 
  box 
  canyon 
  known 
  locally 
  

   as 
  "The 
  Narrows 
  Fork." 
  By 
  so 
  doing 
  Jenny 
  Creek 
  

   tapped 
  and 
  appropriated 
  one 
  of 
  the 
  minor 
  tributaries 
  of 
  

   the 
  former 
  head 
  of 
  the 
  Burning 
  Fork 
  of 
  Licking 
  River. 
  

   This 
  captured 
  tributary 
  is 
  seen 
  on 
  the 
  map 
  just 
  to 
  the 
  

   east 
  of 
  the 
  ' 
  ' 
  gap 
  " 
  at 
  C 
  within 
  the 
  shaded 
  area. 
  Accord- 
  

   ing 
  to 
  field 
  observation 
  the 
  "gap" 
  at 
  C 
  is 
  now 
  shifting 
  

   very 
  slowly 
  as 
  a 
  balance 
  in 
  elevations 
  of 
  the 
  headwaters 
  

   of 
  the 
  two 
  competing 
  creeks 
  has 
  almost 
  been 
  reached. 
  

   Jenny 
  Creek 
  carries 
  about 
  the 
  same 
  amount 
  of 
  water 
  as 
  

   Right 
  Middle 
  Creek 
  and 
  has 
  a 
  lower 
  average 
  elevation. 
  

  

  