﻿22 
  fiOSE 
  : 
  GEOLOGY 
  0¥ 
  THE 
  LOWER 
  NARBADA 
  VALLEY. 
  

  

  traced 
  it 
  to 
  within 
  400 
  feet 
  of 
  the 
  Ghatia 
  scarp. 
  The 
  case 
  is 
  clearly 
  one 
  

   of 
  unconformity, 
  as 
  pointed 
  out 
  by 
  Mr. 
  Medlicott. 
  The 
  circumstance 
  

   that 
  a 
  short 
  distance 
  from 
  the 
  sandstone 
  upland 
  the 
  transition 
  (Bijawar) 
  

   rocks 
  occur 
  just 
  below 
  the 
  oyster-bed, 
  added 
  to 
  the 
  undisturbed 
  condition 
  

   of 
  the 
  strata, 
  disposes 
  of 
  the 
  idea 
  of 
  a 
  fault, 
  as 
  well 
  as 
  of 
  a 
  sharp 
  curve 
  

   in 
  the 
  bedding. 
  The 
  fact 
  of 
  the 
  presence 
  of 
  a 
  small 
  patch 
  of 
  sandstone 
  

   at 
  Agarwara 
  exactly 
  similar 
  to 
  the 
  Ghatia 
  rock 
  testifies 
  to 
  the 
  former 
  

   extension 
  of 
  the 
  latter 
  in 
  that 
  direction. 
  It 
  is 
  clear, 
  therefore, 
  that 
  it 
  

   had 
  suffered 
  denudation 
  before 
  the 
  deposition 
  of 
  the 
  conglomeratic 
  oyster- 
  

   bed 
  and 
  the 
  fossiliferous 
  limestones. 
  We 
  shall 
  in 
  the 
  two 
  following 
  

   chapters 
  adduce 
  grounds 
  to 
  place 
  the 
  one 
  in 
  the 
  upper 
  and 
  the 
  other 
  in 
  

   the 
  lower 
  series 
  of 
  the 
  cretaceous 
  system. 
  The 
  Ghatia 
  and 
  Katkut 
  

   sandstone, 
  therefore, 
  being 
  older, 
  has 
  probably 
  to 
  be 
  located 
  in 
  the 
  Gond- 
  

   wana 
  (Jurassic) 
  system; 
  and 
  in 
  that 
  case 
  there 
  can 
  be 
  hardly 
  any 
  doubt 
  

   that 
  it 
  represents 
  the 
  upper 
  beds 
  (the 
  Mahadevas) 
  of 
  that 
  great 
  forma- 
  

   tion. 
  This 
  is 
  the 
  conclusion 
  arrived 
  at 
  by 
  Mr. 
  Medlicott 
  some 
  years 
  

   ago 
  j 
  1 
  and 
  my 
  more 
  detailed 
  examination 
  corroborates 
  this 
  view. 
  

  

  Fossils. 
  — 
  Several 
  facts 
  confirm 
  this 
  conclusion. 
  The 
  lithological 
  

   resemblance 
  of 
  the 
  sandstones 
  under 
  discussion 
  to 
  the 
  Mahadeva 
  rocks 
  is 
  

   striking, 
  both 
  consisting 
  mainly 
  of 
  " 
  coarse 
  sandstone, 
  grit, 
  and 
  conglo- 
  

   merate." 
  The 
  palseontological 
  likeness 
  is 
  also 
  remarkable. 
  Fragments 
  

   of 
  drift-wood 
  occur 
  in 
  the 
  Ghatia 
  and 
  Katkut 
  sandstone, 
  and 
  appear 
  

   to 
  be 
  locally 
  plentiful. 
  2 
  They 
  are 
  dicotyledonous 
  ; 
  but 
  nothing 
  further 
  

   is 
  determinable 
  with 
  certainty 
  : 
  and 
  these 
  are 
  all 
  the 
  evidence 
  we 
  possess 
  

   of 
  the 
  life 
  of 
  the 
  period. 
  The 
  Mahadevas 
  of 
  the 
  eastern 
  basin 
  offer 
  a 
  

   parallel 
  case, 
  3 
  yielding 
  mainly 
  fragments 
  of 
  hardly 
  distinguishable 
  

   exogenous 
  wood. 
  

  

  Fresh-water 
  origin. 
  — 
  The 
  shallowness 
  of 
  the 
  Katkut 
  basin 
  is 
  testified 
  

   to 
  by 
  the 
  conglomeratic 
  character 
  of 
  the 
  beds 
  ; 
  and 
  the 
  presence 
  of 
  plant 
  

   remains 
  in 
  such 
  abundance 
  east 
  of 
  Katkut 
  establishes 
  the 
  proximity 
  of 
  

  

  1 
  Records, 
  Vol. 
  VIII, 
  pt. 
  3, 
  p. 
  74. 
  See 
  also 
  " 
  Manual," 
  p. 
  221. 
  

   8 
  As 
  at 
  the 
  Kakut 
  quarries. 
  

  

  1 
  A 
  crocodilian 
  scute 
  and 
  some 
  leaves 
  of 
  Ptilophyllum 
  have, 
  however, 
  been 
  found 
  in 
  th» 
  

   Denwa 
  and 
  at 
  Lokurtalai 
  in 
  allied 
  beds. 
  " 
  Manual/' 
  p. 
  136. 
  

  

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  22 
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