﻿THE 
  EPICENTRAL 
  TRACT. 
  139 
  

  

  2 
  feet, 
  the 
  upthrow 
  being, 
  as 
  everywhere 
  else, 
  on 
  the 
  eastern 
  side. 
  

   After 
  continuing 
  on 
  the 
  east 
  of 
  the 
  river 
  for 
  about 
  half 
  a 
  mile, 
  the 
  

   fault 
  crosses 
  it 
  once 
  more 
  and, 
  the 
  upthrow 
  being 
  on 
  the 
  down 
  stream 
  

   side 
  of 
  the 
  fault, 
  the 
  river 
  has 
  been 
  ponded 
  up 
  for 
  a 
  distance 
  of 
  

   about 
  quarter 
  of 
  a 
  mile 
  upstream. 
  At 
  this 
  point 
  the 
  fault 
  is 
  double, 
  

   being 
  two 
  parallel 
  step 
  faults 
  separated 
  by 
  about 
  20 
  yards. 
  

  

  Continuing 
  to 
  NNW 
  the 
  fault 
  keeps 
  in 
  the 
  valley, 
  close 
  to 
  the 
  

   main 
  stream, 
  and 
  has 
  given 
  rise 
  to 
  a 
  number 
  of 
  small 
  pools 
  by 
  

   blocking 
  the 
  side 
  drainage. 
  One 
  of 
  these, 
  which 
  had 
  no 
  outlet, 
  was 
  

   about 
  six 
  or 
  eight 
  feet 
  deep, 
  to 
  judge 
  by 
  the 
  appearance 
  of 
  the 
  

   drowned 
  vegetation 
  in 
  it 
  ; 
  the 
  bed 
  of 
  the 
  old 
  watercourse 
  was 
  re- 
  

   cognisable, 
  and 
  its 
  vertical 
  height 
  above 
  the 
  surface 
  of 
  the 
  water 
  

   was 
  20 
  feet, 
  as 
  determined 
  by 
  an 
  Abney's 
  level. 
  As 
  this 
  old 
  stream 
  

   bed 
  was 
  formerly 
  continuous 
  with 
  the 
  one 
  now 
  submerged 
  in 
  the 
  

   pool, 
  the 
  total 
  throw 
  of 
  the 
  fault 
  cannot 
  here 
  be 
  less 
  than 
  25 
  feet. 
  

  

  Immediately 
  beyond 
  this 
  pool 
  the 
  fault 
  once 
  more 
  crosses 
  the 
  

   Chedrang 
  and 
  forms 
  the 
  waterfall 
  shown 
  in 
  Plate 
  XIV. 
  The 
  waterfall 
  

   is 
  a 
  direct 
  result 
  of 
  the 
  fault, 
  but 
  it 
  does 
  not 
  occupy 
  the 
  exact 
  fault 
  

   line 
  ; 
  this 
  is 
  seen 
  in 
  section 
  on 
  the 
  river 
  side, 
  and 
  the 
  rock 
  on 
  the 
  

   east 
  is 
  seen 
  to 
  be 
  shattered 
  by 
  a 
  great 
  number 
  of 
  nearly 
  parallel 
  

   and 
  vertical 
  fissures, 
  which 
  cut 
  the 
  rock 
  into 
  small 
  fragments. 
  These 
  

   have 
  been 
  washed 
  away 
  by 
  the 
  rush 
  of 
  the 
  stream 
  when 
  in 
  flood, 
  for 
  

   a 
  distance 
  of 
  about 
  20 
  feet 
  back 
  from 
  the 
  fault 
  line, 
  and 
  the 
  frag- 
  

   ments 
  dislodged 
  have 
  accummulated 
  below 
  the 
  fall, 
  reducing 
  its 
  

   height 
  to 
  about 
  9 
  feet. 
  

  

  Below 
  the 
  waterfall 
  the 
  fault 
  runs 
  along 
  the 
  stream 
  bed 
  for 
  

   about 
  half 
  a 
  mile, 
  and 
  the 
  river 
  now 
  flows 
  in 
  a 
  depression 
  on 
  the 
  

   downthrow 
  side 
  of 
  the 
  fault, 
  while 
  the 
  old 
  river 
  bed 
  lies 
  high 
  

   and 
  dry, 
  as 
  shown 
  in 
  Plate 
  XV. 
  Here 
  we 
  see 
  on 
  the 
  right 
  the 
  old 
  

   river 
  bed 
  with 
  its 
  waterworn 
  boulders 
  ; 
  on 
  the 
  left 
  is 
  the 
  present 
  

   channel, 
  and 
  separating 
  the 
  two 
  is 
  the 
  fault 
  scarp 
  3 
  composed 
  in 
  the 
  

   foreground 
  of 
  rock, 
  and 
  further 
  back 
  of 
  river 
  boulders 
  from 
  top 
  to 
  

   bottom. 
  

  

  About 
  half 
  a 
  mile 
  below 
  the 
  waterfall, 
  the 
  fault 
  leaves 
  the 
  river 
  

  

  ( 
  139 
  ) 
  

  

  