﻿30 
  BOSE 
  : 
  GEOLOGY 
  OF 
  THE 
  LOWER 
  NARBADA 
  VALLEY. 
  

  

  surface 
  and 
  capped 
  by 
  altered 
  calcareous 
  rocks 
  to 
  be 
  noticed 
  later 
  on, 
  1 
  run 
  

   parallel 
  to 
  the 
  boundary 
  line. 
  

  

  The 
  northern 
  boundary 
  at 
  Kakanpur, 
  up 
  to 
  the 
  streamlet 
  which, 
  

   originating 
  a 
  mile 
  and 
  a 
  half 
  south-west 
  of 
  Rajawat, 
  passes 
  through 
  

   Siriwasan 
  to 
  join 
  the 
  Galesar-Kandibaro 
  stream, 
  is 
  a 
  curved 
  continu- 
  

   ation 
  of 
  the 
  north-eastern 
  fault. 
  In 
  a 
  section 
  south-west 
  of 
  Kakanpur 
  

   the 
  highest 
  beds 
  of 
  the 
  Nimar 
  sandstone, 
  with 
  the 
  overlying 
  upper 
  

   cretaceous 
  strata 
  belonging 
  to 
  the 
  northern 
  patch, 
  presently 
  to 
  be 
  

   described, 
  are 
  clearly 
  seen 
  to 
  be 
  faulted 
  against 
  lower 
  beds 
  of 
  the 
  same 
  

   series 
  with 
  an 
  unusually 
  high 
  dip 
  (25°) 
  . 
  

  

  West 
  of 
  the 
  Siriwasan 
  streamlet 
  mentioned 
  in 
  the 
  preceding 
  para- 
  

   graph, 
  the 
  sandstones 
  are 
  cut 
  off 
  from 
  the 
  Deccan 
  traps 
  by 
  a 
  probably 
  

   distinct 
  fault. 
  Their 
  dips 
  take 
  a 
  more 
  southern 
  direction 
  and 
  are 
  

   higher 
  (averaging 
  about 
  15°), 
  bringing 
  the 
  higher 
  beds 
  of 
  the 
  cretaceous 
  

   system 
  within 
  a 
  shorter 
  distance 
  of 
  the 
  boundary 
  fault 
  and 
  at 
  lower 
  

   levels 
  than 
  is 
  the 
  case 
  in 
  the 
  eastern 
  portion 
  of 
  the 
  inlier. 
  

  

  The 
  fault 
  at 
  Raisingpura 
  has 
  been 
  already 
  alluded 
  to. 
  It 
  is 
  trace 
  - 
  

   able 
  eastward 
  as 
  a 
  crack 
  ; 
  and 
  in 
  the 
  Umti-Rendi 
  stream 
  the 
  higher 
  

   cretaceous 
  beds 
  are 
  again 
  seen 
  to 
  abut 
  against 
  lower 
  ones 
  of 
  the 
  

   system. 
  The 
  western 
  portion 
  of 
  the 
  boundary 
  is 
  extremely 
  irregular, 
  

   the 
  sedimentary 
  beds 
  passing 
  under 
  stratified 
  accumulations 
  of 
  volcanic 
  

   ash 
  and 
  agglomerates, 
  which 
  will 
  be 
  described 
  in 
  the 
  chapter 
  devoted 
  to 
  

   the 
  Deccan 
  trap 
  formation. 
  

  

  2. 
  Northern 
  inlier. 
  — 
  It 
  is 
  in 
  shape 
  like 
  a 
  bird, 
  with 
  its 
  beak 
  at 
  

   Amalwat, 
  body 
  at 
  Galesar, 
  and 
  tail 
  at 
  Thargaon. 
  The 
  northern 
  boundary 
  

   looks 
  very 
  like 
  a 
  fault, 
  and 
  is 
  parallel 
  to 
  that 
  of 
  the 
  Mohan 
  inlier. 
  To 
  

   the 
  south, 
  the 
  boundary 
  line 
  from 
  the 
  western 
  extremity 
  at 
  Thargaon 
  to 
  

   as 
  far 
  east 
  as 
  the 
  village 
  of 
  Galesar 
  is 
  remarkably 
  straight. 
  

  

  Here 
  the 
  sandstones 
  are 
  cut 
  off 
  on 
  the 
  south 
  by 
  an 
  intrusion 
  of 
  a 
  

   hard, 
  black, 
  compact 
  rock 
  weathering 
  light 
  brown. 
  Its 
  matrix 
  is 
  micro- 
  

   crystalline, 
  with 
  innumerable 
  little 
  greenish 
  microliths, 
  most 
  probably 
  of 
  

   hornblende 
  ; 
  and 
  dispersed 
  in 
  it 
  are 
  beautiful 
  crystals 
  of 
  felspar 
  ; 
  so 
  that 
  

  

  1 
  See 
  infra, 
  p. 
  59. 
  

  

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  30 
  ) 
  

  

  