﻿METAMOBPHICR. 
  7 
  

  

  that 
  those 
  to 
  the 
  north 
  forming 
  the 
  Mathwar 
  and 
  Kawant 
  country 
  were 
  

   at 
  one 
  time 
  continuous 
  with 
  these, 
  but 
  the 
  connection 
  has 
  been 
  broken 
  by 
  

   the 
  denuding 
  action 
  of 
  the 
  Narbada. 
  The 
  Vindhyan 
  mountains 
  which, 
  

   as 
  remarked 
  before, 
  lose 
  in 
  definition 
  and 
  elevation 
  north 
  of 
  Bag 
  and 
  

   Jobat, 
  get 
  quite 
  lost 
  here 
  among 
  the 
  older 
  azoic 
  rocks. 
  

  

  The 
  metamorphic 
  tract 
  in 
  the 
  northern 
  part 
  of 
  this 
  area 
  is 
  com- 
  

   paratively 
  less 
  hilly, 
  and 
  proportionately 
  more 
  fertile. 
  But, 
  on 
  the 
  

   whole, 
  the 
  country 
  is 
  poor. 
  

  

  CHAPTER 
  III. 
  

  

  METAMORPHICS. 
  

  

  The 
  Nimawar-Barwai 
  (map 
  No. 
  1) 
  and 
  Bag-Rajpur 
  areas 
  (maps 
  

   Nos. 
  £ 
  and 
  3) 
  belong 
  to 
  two 
  distinct 
  regions 
  of 
  metamorphic 
  rocks, 
  and 
  

   in 
  describing 
  the 
  different 
  formations 
  it 
  would 
  be 
  convenient 
  to 
  take 
  

   them 
  separately. 
  

  

  7. 
  — 
  Nimdwar-Barwdi 
  Area. 
  

  

  The 
  prevalence 
  of 
  granitoid 
  rocks 
  is 
  a 
  marked 
  characteristic 
  of 
  this 
  

   area. 
  The 
  prevailing 
  form 
  is 
  made 
  up 
  of 
  large 
  crystals 
  of 
  pink 
  

   orthoelase, 
  and 
  smaller 
  greenish- 
  white, 
  rather 
  waxy-looking 
  crystals, 
  ap- 
  

   parently 
  of 
  plagioclastic 
  felspar, 
  1 
  and 
  quartz, 
  with 
  chlorite 
  and 
  horn- 
  

   blende 
  ; 
  another 
  variety 
  has 
  the 
  characteristic, 
  large, 
  orthoclastic 
  felspar, 
  

   and 
  chlorite 
  with 
  a 
  little 
  quartz 
  as 
  its 
  sole 
  constituents. 
  Both 
  pass 
  into 
  

   well-foliated 
  rocks 
  ; 
  but 
  the 
  transition 
  from 
  the 
  one 
  to 
  the 
  other 
  is 
  no- 
  

   where 
  seen. 
  Besides 
  the 
  doleritic 
  dykes 
  probably 
  of 
  the 
  Deccan 
  trap 
  

   age, 
  to 
  be 
  mentioned 
  hereafter, 
  veins 
  of 
  trappean-looking 
  rocks 
  abundant- 
  

   ly 
  intersect 
  the 
  granitoid 
  and 
  schistose 
  rocks. 
  Some 
  of 
  these 
  veins 
  are 
  

   of 
  clearly 
  segregative 
  origin 
  ; 
  as, 
  for 
  instance, 
  a 
  very 
  hard, 
  black, 
  compact, 
  

   fissile 
  rock 
  common 
  about 
  Punghat 
  (Poonghat) 
  and 
  Fategarh. 
  In 
  other 
  

   cases 
  the 
  origin 
  is 
  open 
  to 
  much 
  doubt. 
  In 
  the 
  district 
  of 
  Chandgarh, 
  

  

  1 
  The 
  felspar 
  in 
  question 
  appears 
  under 
  the 
  microscope 
  as 
  mere 
  cloudy 
  patches 
  and 
  does 
  

   not 
  show 
  the 
  colour-handing 
  so 
  characteristic 
  of 
  it 
  in 
  polarised 
  light. 
  I 
  took 
  it 
  to 
  be 
  a 
  de- 
  

   composed 
  form 
  of 
  the 
  pink 
  orthoclastic 
  felspar, 
  which 
  shows 
  beautifully 
  fine 
  cross 
  striation 
  

   with 
  crossed 
  Nicols. 
  

  

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