﻿PRELIMINARY 
  NOTICE. 
  5 
  

  

  ridge, 
  made 
  up 
  of 
  sandstone 
  capped 
  by 
  trap, 
  here 
  forming 
  the 
  crest 
  of 
  

   the 
  Satpura 
  range. 
  On 
  account 
  of 
  its 
  entire 
  inclusion 
  in 
  the 
  hill-area, 
  

   this 
  field 
  has 
  been 
  more 
  appropriately 
  designated 
  the 
  Satpura 
  coal-basin 
  

   by 
  Dr. 
  Oldham. 
  

  

  The 
  field 
  is 
  about 
  thirty 
  to 
  forty 
  miles 
  wide 
  from 
  north 
  to 
  south. 
  

  

  The 
  southern 
  boundary 
  is 
  roughly 
  parallel 
  to 
  the 
  

   Limits 
  of 
  the 
  basin. 
  

  

  northern; 
  and 
  here 
  also 
  metamorphic 
  rocks 
  are 
  

  

  almost 
  continuously 
  exposed 
  at 
  the 
  contact. 
  Along 
  the 
  upper 
  course 
  of 
  

  

  the 
  Tawa 
  the 
  younger 
  rocks 
  have 
  been 
  deeply 
  denuded, 
  exposing 
  a 
  scarp 
  

  

  formed 
  of 
  the 
  crystalline 
  rocks 
  ; 
  but 
  on 
  the 
  side 
  of 
  the 
  Kanhan 
  and 
  of 
  

  

  the 
  Pench 
  the 
  surface 
  of 
  the 
  younger 
  rocks, 
  south 
  of 
  the 
  Motur 
  ridge, 
  is 
  

  

  on 
  the 
  general 
  level 
  of 
  the 
  Satpura 
  plateau. 
  To 
  the 
  west 
  the 
  field 
  

  

  becomes 
  narrowed 
  : 
  at 
  first 
  by 
  the 
  gradual 
  encroachment 
  of 
  the 
  meta- 
  

  

  morphics 
  from 
  the 
  south, 
  and 
  then 
  by 
  the 
  overlapping 
  of 
  the 
  trappean 
  

  

  formation. 
  On 
  the 
  east 
  there 
  is 
  no 
  apparent 
  contraction 
  of 
  the 
  basin, 
  

  

  as 
  defined 
  by 
  the 
  underlying 
  rocks 
  ; 
  the 
  visible 
  limitation 
  of 
  the 
  field 
  in 
  

  

  this 
  direction 
  being 
  entirely 
  produced 
  by 
  the 
  overspreading 
  trap. 
  Some 
  

  

  observations 
  will, 
  however, 
  be 
  noticed 
  seeming 
  to 
  suggest 
  that 
  the 
  basin 
  

  

  proper 
  does 
  stop 
  out 
  at 
  no 
  great 
  distance 
  in 
  that 
  direction. 
  The 
  length 
  

  

  of 
  the 
  area 
  from 
  west 
  to 
  east 
  is 
  about 
  eighty 
  to 
  ninety 
  miles. 
  

  

  The 
  form 
  of 
  the 
  ground 
  is 
  peculiar; 
  and, 
  dependant 
  as 
  it 
  is 
  upon 
  

   The 
  Moran 
  nd 
  SV 
  ^ 
  e 
  local 
  rock-structure, 
  it 
  will 
  be 
  best 
  described 
  

   nva 
  terminal 
  areas. 
  j 
  n 
  connection 
  with 
  a 
  general 
  sketch 
  of 
  the 
  several 
  

  

  formations 
  and 
  their 
  distribution. 
  Such 
  a 
  general 
  view 
  may 
  with 
  ad- 
  

   vantage 
  be 
  based 
  upon 
  a 
  north 
  and 
  south 
  section 
  through 
  the 
  centre 
  of 
  

   the 
  field. 
  Along 
  the 
  northern 
  face, 
  towards 
  the 
  JNarbada 
  valley, 
  the 
  

   hills 
  present 
  two 
  distinct 
  aspects 
  : 
  at 
  each 
  end 
  of 
  the 
  basin, 
  for 
  some 
  

   fifteen 
  to 
  twenty 
  miles, 
  there 
  is 
  a 
  regular 
  scarp, 
  800 
  to 
  1,000 
  feet 
  high, 
  

   the 
  edge 
  of 
  plateaus 
  composed 
  principally 
  of 
  massive 
  sandstones. 
  

   It 
  will 
  be 
  convenient 
  to 
  have 
  names 
  for 
  these 
  two 
  terminal 
  areas, 
  as 
  they 
  

   present 
  both 
  physical 
  and 
  geological 
  peculiarities. 
  On 
  the 
  side 
  facino* 
  

  

  ( 
  137 
  ) 
  

  

  