﻿234 
  rev. 
  j. 
  p. 
  blake 
  on 
  some 
  [May 
  1897, 
  

  

  being 
  conformable 
  even 
  to 
  the 
  surfaces 
  of 
  the 
  hollows 
  which 
  they 
  

   occupy.' 
  1 
  

  

  In 
  the 
  detailed 
  description, 
  however, 
  I 
  can 
  find 
  only 
  eight 
  places 
  

   where 
  they 
  are 
  recorded, 
  namely, 
  west 
  of 
  Bhachau, 
  Bhujia 
  Hill, 
  two 
  

   places 
  north 
  of 
  Katrod, 
  Rhojla 
  Hill, 
  'Khirgreea,' 
  Bampur, 
  and 
  

   Lakhapur. 
  The 
  letter 
  d 
  by 
  which 
  they 
  are 
  indicated 
  is 
  also 
  marked 
  

   on 
  the 
  map 
  at 
  Sanosra 
  and 
  west 
  of 
  Mundhan. 
  Of 
  these, 
  one 
  of 
  the 
  

   localities 
  obviously 
  represents, 
  by 
  the 
  description, 
  some 
  fault-rock 
  

   only 
  ; 
  that 
  at 
  Lakhapur 
  and 
  west 
  of 
  Mundhan 
  is 
  related 
  to 
  an 
  intru- 
  

   sive 
  mass 
  of 
  igneous 
  rock 
  which 
  the 
  deposits 
  do 
  not 
  underlie, 
  but 
  

   merely 
  abut 
  against, 
  so 
  that 
  they 
  may 
  possibly 
  belong 
  to 
  the 
  subrecent 
  

   concrete. 
  Of 
  the 
  deposit 
  at 
  Bampur, 
  it 
  is 
  stated 
  that 
  ' 
  it 
  may 
  have 
  

   been 
  the 
  basal 
  portion 
  of 
  the 
  trap 
  series.' 
  It 
  is 
  not 
  connected 
  with 
  

   the 
  trap 
  of 
  the 
  neighbourhood, 
  and 
  consists 
  of 
  ' 
  scoriaceous 
  lumps 
  of 
  

   trap 
  mixed 
  with 
  sand, 
  etc.,' 
  so 
  that 
  this 
  also 
  may 
  be 
  an 
  old 
  variety 
  of 
  

   subrecent 
  concrete. 
  Of 
  the 
  other 
  deposit 
  north 
  of 
  Katrod, 
  we 
  read 
  

   that 
  beneath 
  the 
  trap 
  is 
  ' 
  a 
  hard 
  bed 
  of 
  black 
  ferruginous 
  grit 
  ; 
  ' 
  it 
  

   therefore 
  contains 
  no 
  trap-fragments, 
  and 
  may 
  perhaps 
  be 
  dismissed 
  as 
  

   doubtful. 
  There 
  remain, 
  therefore, 
  five 
  spots 
  where 
  peculiar 
  deposits 
  

   are 
  actually 
  found 
  below 
  the 
  traps, 
  with 
  a 
  sixth 
  at 
  Artara, 
  unrecorded 
  

   by 
  Mr. 
  Wynne, 
  and 
  in 
  no 
  case 
  are 
  they 
  large 
  enough 
  to 
  map. 
  2 
  

  

  These 
  six 
  may 
  also 
  be 
  grouped 
  together, 
  for 
  those 
  at 
  Artara 
  and 
  

   at 
  Sanosra 
  are 
  of 
  the 
  same 
  character, 
  and 
  those 
  at 
  Khirgreea 
  and 
  

   Rhojla 
  Hills 
  are 
  described 
  as 
  similar 
  to 
  that 
  at 
  Bhujia 
  Hill. 
  There 
  

   are 
  thus, 
  with 
  that 
  west 
  of 
  Bhachau, 
  three 
  types 
  of 
  such 
  deposits. 
  

  

  I 
  have 
  thought 
  it 
  necessary 
  to 
  thus 
  analyse 
  the 
  evidence 
  on 
  

   account 
  of 
  the 
  statement 
  that 
  they 
  are 
  ' 
  largely 
  composed 
  of 
  trappean 
  

   materials,' 
  which 
  is 
  difficult 
  to 
  understand 
  if 
  they 
  are 
  infra- 
  and 
  

   therefore 
  presumably 
  pre-trappean. 
  

  

  We 
  will 
  first 
  examine 
  the 
  deposits 
  on 
  Bhujia 
  Hill. 
  The 
  following 
  

   are 
  the 
  only 
  two 
  sentences 
  in 
  Mr. 
  Wynne's 
  memoir 
  which 
  give 
  us 
  

   his 
  description 
  of 
  them 
  : 
  — 
  ' 
  To 
  the 
  eastward 
  from 
  beneath 
  the 
  highest 
  

   summits, 
  the 
  basalt 
  is 
  underlaid 
  by, 
  and 
  intercalated 
  with, 
  a 
  rapidly 
  

   increasing 
  mass 
  of 
  soft, 
  ? 
  ashy, 
  sandy 
  rock 
  of 
  greenish-yellow 
  colour, 
  

   passing 
  in 
  places 
  into 
  a 
  hard 
  siliceous 
  trappoid 
  sandstone 
  of 
  coarse 
  

  

  texture, 
  containing 
  fragments 
  of 
  woody 
  plants. 
  Prom 
  Bhoojia 
  to 
  

  

  the 
  conical 
  sandstone-hill 
  on 
  which 
  Soorul 
  temple 
  stands 
  and 
  near 
  

   the 
  latter, 
  the 
  subtrappean 
  grits 
  are 
  occasionally 
  seen 
  ; 
  the 
  trappean 
  

   blotches 
  and 
  interstitial 
  portions 
  weathered 
  out 
  into 
  little 
  cavities 
  

   on 
  the 
  surface 
  of 
  the 
  rock, 
  which 
  sometimes 
  occupies 
  pockets 
  or 
  

   wide 
  fissure-like 
  spaces 
  in 
  the 
  underlying 
  Jurassic 
  beds.' 
  3 
  With 
  this 
  

   description 
  I 
  am 
  in 
  perfect 
  agreement, 
  but 
  the 
  accompanying 
  map 
  

   and 
  section 
  do 
  not 
  correspond 
  to 
  it, 
  and 
  I 
  am 
  at 
  a 
  loss 
  to 
  understand 
  

  

  1 
  Mem. 
  Geol. 
  Surv. 
  India, 
  vol. 
  ix. 
  pt. 
  i. 
  (1872) 
  p. 
  56. 
  

  

  2 
  On 
  Mr. 
  Wynne's 
  map 
  there 
  is 
  marked 
  a 
  considerable 
  expanse 
  of 
  infra- 
  

   trappean 
  rocks 
  in 
  the 
  neighbourhood 
  of 
  Bhachau, 
  but 
  there 
  is 
  evidently 
  some- 
  

   thing 
  wrong 
  here. 
  A 
  distinct 
  unexplained 
  colour 
  is 
  inserted, 
  and 
  the 
  details 
  

   do 
  not 
  correspond 
  with 
  the 
  text. 
  Moreover, 
  the 
  deposits 
  are 
  not 
  overlain 
  by 
  

   the 
  traps. 
  

  

  3 
  Op. 
  cit. 
  p. 
  168. 
  

  

  