﻿CONCLUSIONS. 
  53 
  

  

  same 
  groups 
  being- 
  almost 
  continuously 
  exposed 
  along 
  the 
  southern 
  

   boundary. 
  This 
  undoubtedly 
  gives 
  a 
  strong 
  presumption 
  in 
  favor 
  of 
  

   the 
  more 
  or 
  less 
  continuous 
  extension, 
  and 
  even 
  the 
  greater 
  develop- 
  

   ment, 
  of 
  the 
  coal-measures 
  within 
  the 
  basin. 
  From 
  the 
  same 
  evidence 
  

   one 
  might 
  infer 
  — 
  from 
  the 
  position 
  of 
  the 
  Sitariva 
  field 
  far 
  to 
  the 
  north- 
  

   east, 
  and 
  from 
  the 
  much 
  greater 
  development 
  of 
  the 
  coal 
  at 
  the 
  east 
  

   end 
  of 
  the 
  southern 
  outcrops, 
  in 
  the 
  Pench 
  than 
  in 
  the 
  Tawa 
  — 
  that 
  the 
  

   eastern 
  side 
  of 
  the 
  basin 
  may 
  be 
  more 
  productive 
  than 
  the 
  western. 
  It 
  

   was 
  upon 
  such 
  considerations 
  that 
  the 
  exploration 
  of 
  the 
  ground 
  on 
  the 
  

   south 
  of 
  the 
  Sftariva 
  mines 
  has 
  always 
  been 
  urged. 
  

  

  Supposing 
  the 
  coal 
  to 
  be 
  there, 
  the 
  question 
  of 
  depth 
  is 
  of 
  great 
  im- 
  

   portance 
  and 
  of 
  equal 
  difficulty. 
  A 
  glance 
  at 
  the 
  

   Difficulty 
  as 
  to 
  depth. 
  ••,■,■," 
  

  

  figured 
  section 
  {rig. 
  1) 
  will 
  show 
  that 
  if 
  there 
  were 
  

  

  any 
  approach 
  to 
  continuity 
  in 
  depth 
  of 
  the 
  several 
  groups 
  successively 
  

   overlying 
  the 
  Barakars 
  of 
  the 
  southern 
  outcrop, 
  the 
  coal 
  would 
  be 
  hope- 
  

   lessly 
  out 
  of 
  reach 
  over 
  the 
  greater 
  part 
  of 
  the 
  area. 
  It 
  has 
  been 
  shown 
  

   with 
  some 
  probability, 
  in 
  the 
  case 
  of 
  several 
  of 
  these 
  groups, 
  that 
  their 
  

   continuity 
  in 
  depth 
  is 
  very 
  small, 
  the 
  beds 
  of 
  the 
  Motiir 
  horizon 
  being 
  

   those 
  regarding 
  which 
  least 
  information 
  exists 
  at 
  present. 
  But 
  for 
  these, 
  

   as 
  for 
  the 
  Bijori, 
  the 
  Pachmari, 
  and 
  the 
  Denwa 
  beds, 
  there 
  is 
  the 
  fact, 
  

   of 
  the 
  complete 
  overlap 
  (extinction) 
  at 
  the 
  Barakar 
  outcrop 
  on 
  the 
  

   Sitariva. 
  

  

  This 
  feature 
  of 
  extensive 
  overlap 
  with 
  obscure 
  unconformity 
  has 
  

  

  Partial 
  denudati 
  n 
  f 
  ^ 
  een 
  a 
  P 
  uzz 
  ^ 
  e 
  ^ 
  n 
  man 
  y 
  of 
  our 
  Indian 
  coal-fields, 
  

   the 
  lower 
  groups. 
  an( 
  j 
  ft 
  - 
  g 
  now 
  h 
  ere 
  s0 
  pronounced 
  as 
  here. 
  All 
  over 
  

  

  India, 
  the 
  Talchir 
  and 
  Barakar 
  groups 
  are 
  found 
  to 
  have 
  the 
  widest 
  

   extension 
  and 
  the 
  most 
  constant 
  characters, 
  and 
  to 
  be 
  overlaid 
  in 
  different 
  

   fields 
  and 
  in 
  different 
  parts 
  of 
  the 
  same 
  field 
  by 
  groups 
  of 
  local 
  character. 
  

   Partly, 
  perhaps, 
  owing 
  to 
  original 
  difference 
  of 
  deposition, 
  but 
  largely 
  

   also 
  to 
  protection 
  from 
  denudation 
  by 
  a 
  greater 
  covering 
  of 
  the 
  Deccan 
  

   trap 
  -formation, 
  there 
  is 
  a 
  fuller 
  series 
  of 
  these 
  groups 
  in 
  the 
  

  

  C 
  185 
  ) 
  

  

  