﻿INTRUSIVE 
  ROCKS. 
  145 
  

  

  ceteris 
  paribus, 
  the 
  behaviour 
  of 
  beds 
  so 
  circumstanced, 
  and 
  the 
  kind 
  

   and 
  degree 
  of 
  metamorphism 
  produced 
  in 
  them, 
  would 
  mainly 
  depend 
  on 
  

   their 
  composition, 
  and 
  this 
  probably 
  explains 
  why 
  at 
  one 
  spot 
  a 
  perfect 
  

   metamorphic 
  schist 
  is 
  produced, 
  whilst 
  at 
  others 
  a 
  less 
  degree 
  of 
  change 
  

   is 
  observable. 
  I 
  did 
  not 
  notice 
  any 
  veins 
  of 
  serpentine 
  in 
  connexion 
  

   with 
  the 
  bulk 
  of 
  the 
  rock 
  of 
  which 
  Bidoung 
  is 
  composed, 
  and 
  the 
  same 
  

   remark 
  applies 
  to 
  other 
  localities 
  where 
  the 
  rock 
  is 
  largely 
  developed 
  ; 
  

   any 
  veins, 
  if 
  such 
  is 
  their 
  character, 
  occurring 
  subordinately 
  among 
  the 
  

   stratified 
  Axial 
  strata, 
  as 
  on 
  Shuaydoung 
  and 
  the 
  Hlowa 
  stream. 
  In 
  the 
  

   Hlowa 
  stream 
  the 
  serpentine 
  forms 
  a 
  bed 
  or 
  dyke 
  among 
  Axial 
  strata, 
  

   the 
  precise 
  position 
  of 
  which 
  in 
  the 
  group 
  is 
  not 
  clear. 
  It 
  occurs 
  con- 
  

   siderably 
  above 
  the 
  Theyet 
  stream, 
  where 
  the 
  section 
  of 
  the 
  upper 
  Axials 
  

   commences, 
  and 
  is 
  probably 
  intercalated 
  among 
  beds 
  lower 
  in 
  the 
  series 
  

   than 
  thosejn 
  the 
  above 
  section. 
  It 
  is 
  no 
  doubt 
  connected 
  with 
  the 
  

   occurrence 
  of 
  serpentine 
  on 
  Shuaydoung, 
  which 
  in 
  this 
  locality 
  seems 
  

   to 
  be 
  very 
  sparingly 
  developed 
  compared 
  with 
  other 
  places. 
  South 
  

   of 
  the 
  Hlowa 
  a 
  little 
  serpentine 
  in 
  the 
  form 
  of 
  rolled 
  pebbles 
  occurs 
  

   in 
  the 
  Shu 
  (Shoo) 
  stream, 
  and 
  in 
  the 
  upper 
  portion 
  of 
  the 
  Nga- 
  

   wet 
  stream 
  above 
  Kwon-doung. 
  I 
  did 
  not 
  detect 
  the 
  rock 
  in 
  situ 
  in 
  

   either 
  stream, 
  but 
  it 
  might 
  have 
  been 
  derived 
  in 
  the 
  Shu 
  stream 
  from 
  

   small 
  veins 
  in 
  the 
  altered 
  Axial 
  strata 
  rather 
  high 
  up, 
  where 
  consider- 
  

   able 
  disturbance 
  is 
  seen. 
  In 
  the 
  Nga-wet 
  stream 
  I 
  failed 
  to 
  find 
  any 
  

   likely 
  source 
  for 
  the 
  pebbles 
  seen 
  in 
  the 
  channel, 
  and 
  as 
  in 
  both 
  these 
  

   streams 
  the 
  pebbles 
  did 
  not 
  increase 
  in 
  number 
  or 
  size 
  as 
  the 
  channel 
  

   of 
  the 
  stream 
  was 
  traced 
  to 
  its 
  source, 
  I 
  am 
  disposed 
  to 
  think 
  that 
  these 
  

   pebbles 
  may 
  have 
  been 
  derived 
  from 
  the 
  mass 
  of 
  serpentine, 
  to 
  the 
  

   South, 
  on 
  the 
  banks 
  of 
  the 
  Maday 
  stream, 
  full 
  proofs 
  existing 
  of 
  the 
  

   free 
  transport 
  of 
  boulders 
  from 
  farther 
  sources 
  than 
  this, 
  at 
  a 
  time 
  

   anterior 
  to 
  the 
  final 
  excavation 
  of 
  the 
  present 
  river 
  courses, 
  as 
  I 
  have 
  

   already 
  described 
  of 
  the 
  boulder 
  drift 
  found 
  at 
  high 
  levels 
  along 
  the 
  

   course 
  of 
  the 
  Maday 
  and 
  this 
  part 
  of 
  Pegu 
  generally. 
  

  

  T 
  ( 
  333 
  } 
  

  

  