﻿18 
  

  

  Section 
  3. 
  — 
  (b). 
  The 
  Bagra 
  group. 
  

   Enough 
  has 
  been 
  said 
  at 
  the 
  end 
  of 
  last 
  section 
  to 
  explain 
  the 
  

  

  separation 
  of 
  the 
  beds 
  (b) 
  from 
  the 
  Jabalpur 
  

   Extension 
  of 
  the 
  group. 
  

  

  group, 
  whether 
  as 
  a 
  sub-division 
  of 
  that 
  group, 
  

  

  or 
  as 
  a 
  local 
  group 
  in 
  the 
  series 
  of 
  the 
  Satpura 
  basin. 
  The 
  latter 
  would 
  

  

  seem 
  preferable, 
  as 
  these 
  two 
  upper 
  groups 
  are 
  not 
  co-extensive 
  even 
  in 
  

  

  this 
  field 
  ; 
  and 
  in 
  the 
  South 
  Riwa 
  field, 
  where 
  the 
  Jabalpurs 
  are 
  well 
  

  

  developed, 
  the 
  deposits 
  of 
  (b) 
  are 
  not 
  specifically 
  represented. 
  In 
  the 
  

  

  Narbada 
  region, 
  the 
  longitudinal 
  extension 
  of 
  the 
  lower 
  group 
  is 
  great 
  ; 
  

  

  forming, 
  in 
  whole 
  or 
  in 
  part, 
  the 
  northern 
  hills 
  from 
  Nibhora 
  to 
  

  

  Lokartalai. 
  If 
  a 
  name 
  were 
  needed 
  for 
  it, 
  Bagra 
  would 
  suit, 
  from 
  an 
  

  

  old 
  fort 
  built 
  upon 
  these 
  beds 
  at 
  the 
  mouth 
  of 
  the 
  Tawa 
  gorge. 
  The 
  

  

  transverse 
  extension 
  of 
  the 
  group 
  is 
  small 
  in 
  comparison 
  with 
  its 
  length. 
  

  

  In 
  the 
  Sitariva 
  hills 
  it 
  disappears, 
  as 
  the 
  river-beds 
  rise 
  into 
  the 
  Jabalpur 
  

  

  horizon 
  ; 
  there 
  is 
  no 
  sign 
  of 
  it 
  south 
  of 
  the 
  Denwa 
  for 
  the 
  greater 
  part 
  

  

  of 
  its 
  course 
  ; 
  but 
  in 
  the 
  Moran 
  hills 
  it 
  seems 
  to 
  be 
  the 
  predominant 
  

  

  group. 
  

  

  The 
  composition 
  of 
  this 
  group 
  is 
  remarkably 
  variable, 
  and 
  can 
  only 
  

  

  be 
  described 
  by 
  brief 
  successive 
  notices 
  of 
  the 
  

  

  position-. 
  ' 
  localities. 
  From 
  Nibhora 
  to 
  the 
  Sitariva 
  the 
  

  

  east 
  of 
  the 
  Sitariva. 
  . 
  _ 
  , 
  , 
  . 
  

  

  rocks 
  are 
  undisturbed. 
  The 
  exposed 
  sections 
  

   alono- 
  the 
  foot 
  of 
  the 
  hills 
  present 
  very 
  thick 
  banks 
  of 
  coarse 
  conglo- 
  

   merate 
  in 
  a 
  deep 
  red 
  earthy 
  sandy 
  matrix. 
  At 
  higher 
  levels, 
  beds 
  of 
  

   rusty 
  sandy 
  clay 
  and 
  earthy 
  sandstone 
  are 
  intercalated. 
  It 
  is 
  here 
  that 
  

   the 
  difficulty 
  of 
  separating 
  the 
  Jabalpurs 
  from 
  the 
  lower 
  group 
  is 
  most 
  

   felt 
  ; 
  the 
  conglomeritic 
  sandstone 
  of 
  Ckaorigarh, 
  certainly 
  of 
  the 
  Jabal- 
  

   pur 
  group, 
  seeming 
  to 
  form 
  a 
  natural 
  sequence 
  with 
  the 
  beds 
  below 
  

   it. 
  Two 
  streams 
  issue 
  from 
  these 
  hills, 
  at 
  Chengaon 
  and 
  Dongarko 
  ; 
  

   and 
  in 
  them 
  there 
  is 
  the 
  same 
  obscurity. 
  There 
  is, 
  however, 
  certainly 
  a 
  

   great 
  thickness 
  of 
  conglomerate 
  below 
  the 
  first 
  appearance 
  of 
  the 
  Jabal- 
  

   pur 
  shales 
  in 
  the 
  Dongarko 
  stream, 
  about 
  a 
  mile 
  above 
  llanidha, 
  where 
  

   ( 
  150 
  ) 
  

  

  