﻿UPPER 
  CRETACEOUS 
  SERIES. 
  (IGNEOUS.) 
  57 
  

  

  Similar 
  dykes 
  of 
  felstone 
  are 
  met 
  with 
  along 
  the 
  Narbada 
  between 
  

   Dei 
  and 
  Dharamrai. 
  In 
  the 
  bed 
  of 
  the 
  river 
  opposite 
  this 
  latter 
  village, 
  

   as 
  well 
  as 
  in 
  several 
  sections 
  exposed 
  in 
  the 
  neighbourhood, 
  a 
  similar 
  

   felstone 
  occurs 
  interstratified, 
  as 
  it 
  were, 
  with 
  the 
  traps. 
  It 
  was 
  probably 
  

   erupted 
  as 
  lava 
  through 
  the 
  channels 
  just 
  mentioned 
  ; 
  and 
  the 
  irregularity 
  

   of 
  the 
  underlying 
  basaltic 
  surface 
  would 
  prove 
  it 
  to 
  have 
  suffered 
  

   from 
  previous 
  subaerial 
  denudation. 
  The 
  sheets, 
  it 
  may 
  be 
  remarked, 
  

   extend 
  for 
  very 
  short 
  distances. 
  A 
  few 
  miles 
  north 
  of 
  Dharamrai, 
  east 
  

   of 
  Atarsuma, 
  just 
  south 
  of 
  the 
  road 
  between 
  Dei 
  and 
  Kuksi, 
  there 
  is 
  a 
  

   conical 
  hillock 
  not 
  raised 
  more 
  than 
  a 
  hundred 
  feet 
  above 
  the 
  surface. 
  

   Its 
  body 
  is 
  made 
  up 
  of 
  the 
  Deccan 
  basalt; 
  but 
  along 
  the 
  sides 
  are 
  several 
  

   narrow 
  and 
  thin 
  streams 
  of 
  a 
  felspathic 
  rock 
  with 
  brownish 
  veins 
  of 
  

   limestone. 
  They 
  hardly 
  reach 
  the 
  base 
  ; 
  above 
  they 
  are 
  traced 
  to 
  the 
  

   summit 
  of 
  the 
  hillock, 
  which 
  is 
  circular 
  in 
  shape, 
  and 
  is 
  not 
  unlikely 
  the 
  

   base 
  of 
  the 
  crater 
  from 
  which 
  they 
  were 
  poured 
  out, 
  the 
  hollow 
  of 
  the 
  

   crater 
  itself 
  having 
  been 
  denuded 
  away. 
  

  

  The 
  only 
  other 
  localities 
  within 
  the 
  area 
  examined 
  by 
  me 
  where 
  non- 
  

   basic 
  igneous 
  rocks 
  occur 
  in 
  any 
  quantity 
  have 
  been 
  noticed 
  in 
  connection 
  

   with 
  the 
  Kawant 
  trachyte. 
  Mr. 
  Blanford, 
  however, 
  describes 
  several 
  

   trachytic 
  intrusions 
  further 
  westward, 
  such 
  as 
  at 
  Matepanai 
  hill, 
  Pud- 
  

   wani, 
  &C. 
  1 
  

  

  The 
  Kawant 
  trachytes, 
  inasmuch 
  as 
  they 
  are 
  overlaid 
  and 
  cut 
  across 
  

   by 
  what 
  are 
  apparently 
  the 
  lowest 
  beds 
  of 
  the 
  Deccan 
  trap, 
  are 
  of 
  pre- 
  

   trappean 
  age, 
  and 
  afford, 
  therefore, 
  a 
  normal 
  case 
  of 
  the 
  order 
  of 
  vol- 
  

   canic 
  outbursts. 
  The 
  Barwani 
  felstones, 
  on 
  the 
  other 
  hand, 
  are 
  an 
  ex- 
  

   ception 
  to 
  that 
  order, 
  for 
  their 
  intrusion 
  was 
  effected 
  through 
  fissures 
  in 
  

   the 
  basaltic 
  flows, 
  and 
  must 
  consequently 
  have 
  been 
  posterior 
  to 
  these. 
  

  

  The 
  district 
  of 
  Dei 
  furnishes 
  numerous 
  interesting 
  instances 
  of 
  dykes 
  

   and 
  irregular 
  intrusions, 
  which 
  prove 
  it 
  to 
  have 
  been 
  a 
  volcanic 
  centre 
  in 
  

   the 
  Deccan 
  trap 
  age. 
  About 
  the 
  town 
  of 
  Dei 
  and 
  between 
  it 
  and 
  

   Dharamrai, 
  there 
  are 
  sundry 
  small 
  straggling 
  inliers 
  of 
  pretrappean 
  creta- 
  

   ceous 
  rocks, 
  cut 
  through 
  by 
  the 
  traps 
  which 
  have 
  frequently 
  forced 
  up 
  

  

  1 
  " 
  Mem." 
  VI, 
  pt. 
  3, 
  p. 
  59 
  ; 
  " 
  Man.," 
  p. 
  327. 
  Mr. 
  Fedden 
  also 
  has 
  met 
  with 
  trachytic 
  

   rocks 
  in 
  the 
  Deccan 
  trap 
  in 
  Kattywar. 
  

  

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  57 
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