﻿36 
  BOSE 
  : 
  GEOLOGY 
  OF 
  THE 
  LOWER 
  NARBADA 
  VALLEY. 
  

  

  at 
  Ghatia 
  ; 
  but 
  there 
  they 
  are 
  inconsiderable 
  both 
  in 
  extent 
  and 
  thick- 
  

   ness. 
  At 
  Agarwara, 
  and 
  Yalam, 
  also, 
  their 
  outcrop 
  is 
  equally 
  insigni- 
  

   ficant, 
  and, 
  besides, 
  is 
  covered 
  up 
  by 
  alluvium, 
  being 
  observable 
  only 
  in 
  

   the 
  beds 
  of 
  the 
  little 
  streams 
  which 
  flow 
  past 
  these 
  villages. 
  The 
  

   strata 
  roll 
  about 
  very 
  much, 
  especially 
  at 
  Yalam, 
  owing 
  probably 
  to 
  

   slight 
  local 
  dislocations. 
  The 
  thickness 
  here 
  does 
  not 
  exceed 
  15 
  feet; 
  

   and 
  the 
  several 
  groups 
  are 
  not 
  clearly 
  distinguishable. 
  

  

  Proceeding 
  westward 
  they 
  are 
  next 
  found 
  at 
  Bowarla 
  (10 
  miles 
  west 
  

   of 
  Mandu) 
  . 
  They 
  thin 
  out 
  again 
  in 
  a 
  western 
  direction 
  ; 
  and 
  south 
  of 
  

   Kawant 
  the 
  case 
  is 
  just 
  as 
  it 
  is 
  near 
  Barwai, 
  the 
  easternmost 
  point 
  

   of 
  their 
  occurrence. 
  The 
  Lametas 
  occur 
  throughout 
  the 
  area. 
  

  

  Section 
  I. 
  — 
  The 
  Nodular 
  Limestone. 
  

  

  Name, 
  area, 
  fyc. 
  — 
  The 
  name, 
  like 
  all 
  such 
  derived 
  from 
  mere 
  appear- 
  

   ance 
  or 
  lithological 
  character, 
  is 
  open 
  to 
  objection 
  ; 
  for 
  near 
  Barwai 
  

   and 
  Kawant 
  (the 
  eastern 
  and 
  western 
  extremities 
  of 
  our 
  area 
  re- 
  

   spectively), 
  the 
  rocks 
  representing 
  it 
  are 
  not 
  nodular. 
  On 
  the 
  whole, 
  

   however, 
  the 
  name 
  seemed 
  to 
  me 
  the 
  best 
  that 
  could 
  be 
  given, 
  in 
  the 
  

   absence 
  of 
  any 
  towns 
  of 
  importance 
  after 
  which 
  they 
  might 
  be 
  called 
  

   without 
  giving 
  rise 
  to 
  misapprehension. 
  1 
  

  

  Between 
  Bowarla 
  and 
  Phulmal 
  (in 
  the 
  district 
  of 
  Ali 
  Rajpur) 
  the 
  

   Htholooy 
  of 
  the 
  group 
  is 
  remarkably 
  persistent, 
  being 
  an 
  argillaceous, 
  

   whitish 
  (or 
  bluish 
  white), 
  compact, 
  and 
  characteristically 
  nodular 
  lime- 
  

   stone. 
  At 
  Bowarla 
  and 
  Kherwan 
  the 
  base 
  is 
  not 
  seen 
  ; 
  near 
  Kachaoda, 
  

   in 
  the 
  northern 
  portion 
  of 
  the 
  Man 
  valley, 
  it 
  rests 
  directly 
  on 
  the 
  meta- 
  

   morphics 
  ; 
  but 
  at 
  Chirakhan 
  and 
  westward, 
  throughout 
  the 
  area, 
  the 
  

   Nimar 
  sandstone 
  is 
  invariably 
  present 
  at 
  the 
  base. 
  

  

  The 
  outcrop 
  of 
  the 
  group 
  is 
  but 
  slight, 
  being 
  mostly 
  hidden 
  by 
  the 
  

   coralline-limestone 
  or 
  the 
  Lametas, 
  to 
  which 
  it 
  forms 
  a 
  fringe. 
  The 
  

   total 
  average 
  thickness 
  is 
  about 
  40 
  feet. 
  It 
  attenuates 
  westward, 
  but 
  

  

  1 
  Bag 
  is 
  tbe 
  only 
  well-known 
  town 
  in 
  the 
  area 
  where 
  the 
  limestone 
  occurs. 
  But 
  as 
  

   Bag 
  beds 
  have 
  been 
  used 
  hitherto 
  in 
  a 
  very 
  wide 
  sense 
  (including 
  all 
  the 
  limestones 
  men- 
  

   tioned 
  in 
  the 
  text 
  above, 
  as 
  well 
  as 
  the 
  sandstones 
  described 
  in 
  the 
  preceding 
  chapter), 
  

   I 
  have 
  avoided 
  it 
  to 
  prevent 
  confusion. 
  

  

  ( 
  3G 
  ) 
  

  

  