﻿OLDER 
  ALLUVIUM. 
  45 
  

  

  little 
  recapitulation 
  here 
  is 
  therefore 
  unavoidable. 
  This 
  deposit 
  may 
  be 
  

   divided 
  into 
  (a) 
  an 
  upper 
  and 
  (5) 
  a 
  lower 
  portion; 
  the 
  latter 
  (i) 
  of 
  

   irregular 
  development 
  and 
  consisting 
  of 
  coarse 
  gravels 
  transported 
  from 
  

   a 
  distance 
  with 
  large 
  included 
  masses 
  of 
  silicified 
  wood 
  derived 
  from 
  the 
  

   neighbourhood, 
  whilst 
  the 
  former 
  (a) 
  consists 
  of 
  a 
  very 
  homogeneous 
  

   clay 
  differing 
  mainly 
  from 
  the 
  older 
  clay 
  of 
  the 
  Gangetic 
  basin, 
  by 
  being 
  

   less 
  rich 
  in 
  lime, 
  but 
  otherwise 
  resembling 
  it 
  in 
  general 
  appearance 
  and 
  

   mode 
  of 
  deposition 
  and 
  arrangement. 
  

  

  (a). 
  Older 
  alluvial 
  clay 
  . 
  — 
  This 
  deposit 
  (with 
  the 
  exception 
  of 
  the 
  

   trifling 
  patch 
  of 
  newer 
  alluvium 
  below 
  Pantanau 
  previously 
  described) 
  

   comprises 
  the 
  entire 
  level 
  plains 
  of 
  Pegu, 
  within 
  the 
  valley 
  of 
  the 
  

   Irrawadi 
  and 
  the 
  alluvial 
  plains 
  of 
  the 
  Sittoung 
  valley 
  also, 
  the 
  two 
  deltas 
  

   so 
  blending 
  to 
  the 
  South 
  that 
  no 
  distinction 
  can 
  be 
  made 
  between 
  the 
  

   deposit 
  in 
  either, 
  unless 
  perhaps 
  the 
  alluvium 
  in 
  the 
  Sittoung 
  valley 
  is 
  

   slightly 
  more 
  sandy 
  than 
  that 
  along 
  the 
  course 
  of 
  the 
  Irrawadi. 
  

  

  This 
  clay 
  is 
  in 
  constitution 
  very 
  homogeneous, 
  somewhat 
  arenaceous, 
  

   decidedly 
  more 
  so 
  than 
  the 
  older 
  alluvial 
  clay 
  of 
  the 
  Granges 
  valley, 
  and 
  

   of 
  a 
  uniform 
  yellowish 
  color, 
  in 
  places 
  assuming 
  a 
  more 
  reddish 
  color 
  

   than 
  usual, 
  and 
  under 
  certain 
  conditions 
  of 
  exposure 
  and 
  weathering 
  

   assuming 
  an 
  imperfect 
  lateritic 
  appearance 
  superficially. 
  The 
  last 
  ap- 
  

   pearance 
  is 
  usually 
  seen 
  in 
  the 
  sides 
  of 
  wells, 
  and 
  is 
  indicated 
  by 
  the 
  

   peculiar 
  mottled 
  appearance 
  the 
  rock 
  presents 
  from 
  the 
  irregular 
  manner 
  

   in 
  which 
  the 
  peroxide 
  of 
  iron 
  arranges 
  itself. 
  The 
  whole 
  deposit 
  is 
  

   very 
  homogeneous, 
  a 
  little 
  more 
  sandy 
  in 
  some 
  spots 
  than 
  in 
  others, 
  and 
  

   with 
  occasional 
  thin 
  layers 
  of 
  sand 
  irregularly 
  and 
  sparingly 
  dispersed 
  

   through 
  it 
  ; 
  the 
  only 
  recognisible 
  band 
  possessing 
  a 
  distinctive 
  character 
  

   in 
  it, 
  being 
  a 
  dark 
  layer 
  of 
  a 
  few 
  inches 
  only 
  in 
  thickness, 
  but 
  of 
  wide 
  

   distribution. 
  Judging 
  from 
  this 
  band 
  the 
  whole 
  deposit 
  would 
  seem 
  to 
  

   have 
  a 
  gentle 
  slope 
  to 
  the 
  South, 
  at 
  a 
  somewhat 
  greater 
  rate 
  than 
  the 
  

   present 
  surface 
  of 
  the 
  country; 
  for 
  whilst 
  above 
  Myanoung 
  this 
  dark 
  

   band 
  is 
  clearly 
  seen 
  high 
  up 
  in 
  the 
  bank 
  and 
  but 
  little 
  below 
  the 
  high 
  

  

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