﻿44 
  THEOBALD: 
  GEOLOGY 
  OF 
  PEGU. 
  

  

  colored 
  typical 
  regur 
  of 
  Central 
  India. 
  Precisely 
  the 
  same 
  features 
  of 
  

   surface 
  are 
  seen 
  on 
  a 
  smaller 
  scale 
  at 
  the 
  Pebingoan 
  Minet-toung. 
  

   Whilst 
  the 
  mode 
  of 
  occurrence 
  of 
  regur 
  at 
  these 
  two 
  spots 
  gives 
  striking 
  

   and 
  unequivocal 
  support 
  to 
  the 
  view 
  of 
  the 
  direct 
  derivation 
  of 
  at 
  

   least 
  some 
  regur 
  from 
  the 
  in 
  situ 
  decomposition 
  of 
  a 
  suitable 
  trappean 
  

   rock, 
  it 
  no 
  less 
  shows 
  the 
  connexion 
  between 
  the 
  darker 
  hue 
  of 
  the 
  

   soil 
  and 
  certain 
  paludal 
  conditions 
  present; 
  for 
  thus 
  I 
  should 
  explain 
  

   the 
  greater 
  intensity 
  of 
  hue 
  of 
  the 
  soil 
  at 
  the 
  top 
  of 
  the 
  hill 
  than 
  is 
  

   seen 
  lower 
  down 
  its 
  slopes, 
  the 
  drainage 
  and 
  removal 
  of 
  surface 
  water 
  

   being 
  of 
  course 
  much 
  more 
  complete 
  in 
  the 
  latter 
  than 
  in 
  the 
  former 
  

   position. 
  

  

  At 
  a 
  third 
  spot, 
  nearly 
  equidistant 
  from 
  the 
  two 
  abovementioned, 
  

   the 
  same 
  bed 
  of 
  trappean 
  character 
  is 
  seen 
  crossing 
  the 
  hills; 
  and 
  a 
  

   narrow 
  band 
  of 
  regur 
  here 
  also 
  marks 
  its 
  outcrop, 
  as 
  at 
  either 
  of 
  the 
  

   abovementioned 
  Minet-toungs. 
  

  

  It 
  may 
  here 
  be 
  remarked 
  that 
  the 
  formation 
  of 
  regur 
  from 
  the 
  

   in 
  situ 
  decomposition 
  of 
  certain 
  beds 
  of 
  the 
  Deccan 
  and 
  Central 
  India 
  

   traps 
  is 
  a 
  process 
  coeval 
  with 
  the 
  existence 
  of 
  those 
  rocks 
  ; 
  for 
  what 
  

   is 
  the 
  black 
  jaspideous 
  rock 
  so 
  often 
  seen 
  crammed 
  with 
  Lymnseas, 
  

   Physa 
  Prinsepii, 
  and 
  other 
  fossils 
  of 
  the 
  Inter-trappean 
  fauna, 
  but 
  an 
  

   ancient 
  re^ur, 
  formed, 
  as 
  we 
  now 
  see 
  it 
  to 
  be, 
  by 
  the 
  surface 
  decom- 
  

   position 
  of 
  trap, 
  accumulated 
  in 
  depressions 
  of 
  the 
  then 
  surface 
  of 
  the 
  

   country, 
  and 
  finally 
  baked 
  into 
  a 
  jaspideous 
  mass 
  by 
  the 
  outpouring 
  

   over 
  it 
  of 
  the 
  next 
  flow 
  of 
  trap 
  ? 
  

  

  V. 
  — 
  Older 
  Alluvium. 
  

  

  The 
  older 
  alluvium, 
  or 
  emphatically 
  the 
  alluvium 
  of 
  the 
  valley 
  of 
  

   the 
  Irrawadi 
  and 
  of 
  Birmah 
  generally, 
  consists 
  of 
  an 
  homogeneous 
  de- 
  

   posit 
  whose 
  general 
  relations 
  and 
  character 
  I 
  have 
  already 
  sketched 
  in 
  

   the 
  Records 
  of 
  the 
  Geological 
  Survey 
  of 
  India, 
  No. 
  1 
  of 
  1870. 
  A 
  

  

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  232 
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