﻿62 
  THEOBALD 
  : 
  GEOLOGY 
  OF 
  PEGU. 
  

  

  who 
  often 
  surround 
  their 
  sacred 
  buildings 
  with 
  posts 
  of 
  silieified 
  wood 
  

   where 
  the 
  material 
  is 
  procurable; 
  but 
  by 
  examining 
  some 
  cuttings 
  just 
  

   made 
  I 
  satisfied 
  myself 
  that 
  moderate 
  sized 
  pieces 
  of 
  fossil-wood 
  of 
  

   a 
  somewhat 
  friable 
  character 
  actually 
  occurred 
  in 
  the 
  surface 
  gravel 
  and 
  

   detritus 
  to 
  the 
  Eastward 
  of 
  the 
  Great 
  Pagoda, 
  and 
  the 
  occurrence 
  of 
  

   such 
  pieces 
  I 
  consider 
  to 
  be 
  conclusive, 
  to 
  the 
  former 
  extension 
  of 
  the 
  

   group 
  as 
  far 
  South 
  as 
  Rangoon. 
  

  

  In 
  the 
  Records 
  of 
  the 
  Geological 
  Survey 
  of 
  India, 
  Part 
  4 
  of 
  1869, 
  

   I 
  have 
  divided 
  the 
  present 
  group 
  as 
  follows 
  in 
  descending 
  order 
  : 
  — 
  

  

  a. 
  — 
  Fossil-ivood 
  sands. 
  

  

  Sand, 
  in 
  parts 
  gravelly 
  and 
  conglomeratic, 
  characterised 
  by 
  the 
  profusion 
  of 
  con- 
  

   cretions 
  of 
  peroxide 
  of 
  iron 
  associated 
  with 
  it. 
  Fossils 
  : 
  trunks 
  of 
  silieified 
  exo- 
  

   genous 
  wood, 
  and 
  locally 
  mammalian 
  hones. 
  In 
  the 
  subordinate 
  beds 
  of 
  

   conglomerate 
  rolled 
  fragments 
  of 
  wood 
  as 
  above, 
  silieified 
  (that 
  is, 
  mineralised 
  

   subsequent 
  to 
  their 
  entombment) 
  mammalian 
  and 
  reptilian 
  bones 
  and 
  teeth 
  

   of 
  cartilaginous 
  fish 
  (squalidce). 
  

  

  b. 
  — 
  Fine 
  silty 
  clay. 
  

  

  Fine 
  silty 
  clay, 
  with 
  a 
  few 
  small 
  pebbles 
  mixed 
  with 
  sand 
  in 
  strings 
  here 
  and 
  

   there, 
  the 
  whole 
  very 
  fine 
  and 
  homogenous 
  and 
  devoid 
  of 
  fossils. 
  

  

  c. 
  — 
  llogoung 
  sands. 
  

   A 
  mixed 
  assemblage 
  of 
  shales, 
  sands, 
  and 
  conglomerates, 
  the 
  last 
  very 
  subordi- 
  

   nate, 
  partaking 
  much 
  of 
  the 
  characters 
  of 
  beds 
  a, 
  b 
  ; 
  a 
  little 
  of 
  the 
  concre- 
  

   tionary 
  oxide 
  of 
  iron. 
  Fossils 
  : 
  — 
  rolled 
  wood 
  silieified, 
  mammalian 
  and 
  reptilian 
  

   bones 
  and 
  cartilaginous 
  fish 
  teeth. 
  Towards 
  the 
  base 
  the 
  beds 
  contain 
  marine 
  

   shells, 
  and 
  pass 
  into 
  those 
  of 
  the 
  next 
  group. 
  

  

  In 
  the 
  above 
  number 
  of 
  the 
  Records, 
  I 
  have 
  classed 
  these 
  beds 
  as 
  

   Miocene 
  ; 
  but, 
  I 
  think, 
  considerable 
  weight 
  attaches 
  to 
  the 
  view 
  of 
  Mr. 
  W. 
  

   Blanford, 
  who 
  is 
  inclined 
  to 
  regard 
  them 
  as 
  more 
  recent. 
  In 
  his 
  account 
  

   of 
  a 
  visit 
  to 
  Puppadoung, 
  an 
  extinct 
  volcano 
  in 
  Upper 
  Burmah, 
  which 
  

   has 
  burst 
  through 
  beds 
  of 
  corresponding 
  age 
  to 
  those 
  I 
  am 
  describing, 
  

   Mr. 
  W. 
  Blanford 
  thus 
  expresses 
  himself, 
  Journal, 
  Asiatic 
  Society 
  of 
  

   Beno-al, 
  volume 
  XXXI, 
  page 
  225. 
  "The 
  period 
  during 
  which 
  Pappa 
  

   was 
  in 
  action 
  was, 
  therefore, 
  in 
  part 
  at 
  least 
  not 
  later 
  than 
  that 
  of 
  the 
  

   deposition 
  of 
  beds 
  containing 
  remains 
  of 
  Elephas, 
  Mastodon, 
  Rhinoceros, 
  

   Hippopotamus, 
  and 
  ruminants. 
  The 
  geological 
  age 
  of 
  these 
  beds 
  has 
  

   with 
  some 
  doubt 
  been 
  considered 
  to 
  be 
  Miocene, 
  but 
  from 
  their 
  general 
  

  

  ( 
  250 
  ) 
  

  

  