﻿MET 
  AMORPHICS. 
  9 
  

  

  found 
  in 
  the 
  planes 
  of 
  foliation. 
  In 
  the 
  northern 
  portion 
  of 
  the 
  Hatni 
  

   valley, 
  besides 
  this 
  limestone, 
  there 
  occur 
  granitoid 
  rocks 
  and 
  various 
  

   kinds 
  of 
  schists 
  ; 
  in 
  the 
  southern 
  portion, 
  however, 
  as 
  near 
  Nanpur, 
  gneiss 
  

   prevails 
  almost 
  to 
  the 
  entire 
  exclusion 
  .of 
  these. 
  

  

  The 
  metamorphic 
  ground 
  near 
  Jobat 
  demands 
  a 
  little 
  more 
  detailed 
  

   notice, 
  on 
  account 
  of 
  its 
  having 
  been 
  regarded 
  differently 
  by 
  Mr. 
  Blanford. 
  

   At 
  Begalgaon 
  and 
  Bilasa, 
  2 
  or 
  3 
  miles 
  east 
  of 
  Jobat, 
  white 
  quartzite 
  

   abounds; 
  proceeding 
  westward, 
  brownish, 
  highly 
  micaceous 
  limestone 
  

   and 
  schists 
  are 
  found. 
  Clay 
  slates 
  occur 
  a 
  few 
  miles 
  north-east 
  of 
  Jobat 
  

   at 
  Baira 
  ; 
  but 
  the 
  slates 
  cannot 
  be 
  traced 
  far, 
  and 
  pass 
  into 
  talcose 
  schists. 
  

   All 
  these 
  rocks 
  between 
  Bilasa 
  and 
  Baira 
  form 
  a 
  somewhat 
  elevated 
  flat, 
  

   between 
  which 
  and 
  the 
  Jobat 
  scarp 
  of 
  a 
  peculiar 
  jaspery 
  reddish 
  rock 
  the 
  

   valley 
  is 
  occupied 
  by 
  a 
  belt 
  of 
  a 
  granitoid 
  rock 
  with 
  quartz, 
  orthoclase, 
  

   black 
  mica, 
  and 
  hornblende. 
  This 
  last-mentioned 
  rock 
  shows 
  at 
  places 
  

   distinct 
  foliated 
  arrangement. 
  It 
  forms 
  the 
  base 
  of 
  the 
  ({ 
  red 
  rock 
  " 
  

   scarp 
  mentioned 
  above, 
  and 
  is 
  again 
  met 
  with 
  at 
  Jhiri 
  and 
  Ghungsia 
  

   west 
  of 
  the 
  scarp. 
  At 
  Pangola, 
  in 
  a 
  depression 
  formed 
  by 
  a 
  streamlet 
  

   cutting 
  through 
  it, 
  there 
  is 
  found 
  a 
  granitoid 
  rock 
  somewhat 
  different 
  

   from 
  the 
  one 
  just 
  noticed. 
  It 
  is 
  formed 
  of 
  flesh-coloured 
  felspar, 
  black 
  

   hornblende, 
  and 
  specks 
  and 
  strings 
  of 
  a 
  greenish 
  mineral 
  (epidote) 
  . 
  Mr. 
  

   Blanford 
  noticed 
  the 
  presence 
  of 
  bronzite 
  and 
  serpentine 
  besides. 
  1 
  Epi- 
  

   dote 
  is 
  so 
  abundant, 
  especially 
  towards 
  the 
  surface, 
  that 
  it 
  obscures 
  the 
  

   felspar, 
  and 
  this 
  affords 
  a 
  clue 
  to 
  the 
  origin 
  of 
  the 
  epidote, 
  viz., 
  that 
  it 
  is 
  

   formed 
  by 
  the 
  alteration 
  of 
  the 
  felspar. 
  Under 
  the 
  microscope 
  the 
  trans- 
  

   formation 
  may 
  be 
  well 
  studied. 
  Serpentine 
  is 
  also 
  an 
  alteration 
  product. 
  

   Thus 
  the 
  original 
  constituents 
  of 
  the 
  rock 
  would 
  be 
  reduced 
  to 
  orthoclase 
  

   and 
  hornblende 
  ; 
  and 
  it 
  is 
  probably 
  a 
  true 
  syenite. 
  In 
  this 
  connection, 
  

   I 
  may 
  notice 
  the 
  occurrence 
  of 
  what 
  appear 
  to 
  be 
  baked 
  shales 
  in 
  the 
  

   immediate 
  neighbourhood. 
  

  

  The 
  whole 
  of 
  the 
  ground 
  just 
  described 
  from 
  Baira 
  to 
  Jhiri, 
  including 
  

   Jobat, 
  has 
  been 
  mapped 
  by 
  Mr. 
  Blanford 
  as 
  Bijawar. 
  We 
  shall 
  find 
  

   reason 
  later 
  on 
  to 
  assign 
  to 
  the 
  " 
  red 
  rock 
  " 
  a 
  much 
  later 
  date. 
  Of 
  the 
  

   other 
  rocks, 
  the 
  Baira 
  slates 
  are 
  the 
  only 
  ones 
  which 
  have 
  a 
  Bijawar 
  

  

  J 
  Op. 
  cit., 
  p. 
  156. 
  

  

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  9 
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