﻿112 
  OLDHAM 
  : 
  GREAT 
  EARTHQUAKE 
  OF 
  1897. 
  

  

  ESE 
  direction, 
  transverse 
  to 
  the 
  run 
  of 
  the 
  crest 
  of 
  the 
  ridge, 
  with 
  

   a 
  downthrow 
  of 
  about 
  2 
  feet 
  to 
  the 
  south. 
  Off 
  the 
  path 
  the 
  throw 
  

   could 
  not 
  be 
  recognised, 
  but 
  the 
  line 
  of 
  the 
  fault 
  could 
  be 
  traced 
  

   through 
  a 
  clearing 
  for 
  about 
  300 
  yards 
  before 
  it 
  was 
  lost 
  in 
  dense 
  

   bamboo 
  jungle. 
  

  

  We 
  come 
  now 
  to 
  the 
  consideration 
  of 
  the 
  second 
  class 
  of 
  perma- 
  

   nent 
  changes, 
  the 
  lakes 
  or 
  pools 
  formed 
  by 
  interruptions 
  of 
  the 
  

   gradient 
  of 
  drainage 
  channels, 
  not 
  directly 
  due 
  to 
  faulting. 
  The 
  prin- 
  

   cipal 
  group 
  of 
  these 
  lies 
  in 
  the 
  north-eastern 
  portion 
  of 
  the 
  Garo 
  Hills 
  

   District, 
  to 
  the 
  south 
  and 
  south-eastwards 
  of 
  the 
  faults 
  already 
  de- 
  

   scribed. 
  In 
  describing 
  them 
  it 
  will 
  be 
  more 
  convenient 
  to 
  start 
  from 
  

   the 
  south 
  and 
  take 
  them 
  in 
  the 
  order 
  in 
  which 
  they 
  were 
  actually 
  

   seen. 
  

  

  The 
  first 
  of 
  those 
  seen 
  by 
  me 
  was 
  in 
  the 
  valley 
  of 
  the 
  Rong- 
  

   tham 
  river, 
  about 
  3 
  miles 
  above 
  its 
  confluence 
  with 
  the 
  Samsang 
  

   or 
  western 
  branch 
  of 
  the 
  Sameswari, 
  and 
  in 
  the 
  lands 
  of 
  the 
  village 
  of 
  

   Dobukhol. 
  I 
  first 
  saw 
  this 
  at 
  its 
  outlet, 
  and, 
  on 
  being 
  informed 
  that 
  

   this 
  was 
  the 
  take 
  of 
  which 
  I 
  had 
  heard, 
  it 
  was 
  difficult 
  to 
  realise 
  

   that 
  there 
  was 
  anything 
  unusual. 
  To 
  the 
  left, 
  or 
  down 
  stream, 
  the 
  

   stream 
  bed 
  was 
  ordinary 
  coarse 
  shingle, 
  a 
  natural 
  mountain 
  torrent 
  

   bed, 
  to 
  the 
  right 
  stretched 
  a 
  pool 
  which 
  at 
  first 
  sight 
  did 
  not 
  differ 
  

   from 
  the 
  pools 
  which 
  are 
  common 
  enough 
  on 
  mountain 
  streams. 
  I 
  

   was 
  however, 
  informed 
  that 
  before 
  the 
  earthquake 
  there 
  had 
  been 
  

   no 
  pool 
  here, 
  but 
  a 
  reach 
  of 
  rock 
  and 
  boulders 
  exactly 
  similar 
  to 
  

   the 
  portion 
  of 
  the 
  stream 
  bed 
  below 
  the 
  present 
  pool. 
  

  

  Embarking 
  on 
  a 
  bamboo 
  raft 
  on 
  this 
  pool, 
  I 
  proceeded 
  to 
  ex- 
  

   plore 
  it. 
  Travelling 
  upstream 
  I 
  found 
  the 
  water 
  gradually 
  deepening, 
  

   but 
  the 
  bottom 
  still 
  retained 
  the 
  same 
  character 
  of 
  coarse 
  sub- 
  

   rounded 
  boulders, 
  characteristic 
  of 
  a 
  stream 
  bed 
  with 
  a 
  rapid 
  current. 
  

   The 
  deepening 
  was 
  gradual 
  and 
  the 
  presence 
  of 
  a 
  slight 
  deposit 
  of 
  

   sand 
  and 
  mud 
  over 
  the 
  boulders 
  pointed 
  to 
  a 
  change 
  in 
  the 
  con- 
  

   dition 
  of 
  the 
  stream 
  at 
  this 
  point, 
  from 
  those 
  which 
  had 
  prevailed 
  

   when 
  the 
  bed 
  of 
  coarse 
  boulders 
  was 
  originally 
  formed. 
  

  

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  152 
  ) 
  

  

  