﻿8 
  MEDL1C0TT: 
  SATPURA 
  COAL-BASIN. 
  

  

  There 
  are 
  three 
  groups 
  distinguishable 
  above 
  the 
  Pachmari 
  sand- 
  

  

  ,, 
  „ 
  , 
  stone. 
  Where 
  the 
  hills 
  along 
  the 
  north 
  fringe 
  of 
  

  

  Groups 
  above 
  the 
  Fach- 
  ° 
  & 
  

  

  man 
  sandstone. 
  ftie 
  b 
  asm 
  attain 
  much 
  height 
  they 
  are 
  capped 
  by 
  

  

  a 
  massive 
  sandstone 
  (a) 
  of 
  the 
  section. 
  It 
  is 
  underlaid 
  by 
  a 
  very 
  mixed 
  

   set 
  of 
  beds, 
  600 
  to 
  800 
  feet 
  thick; 
  sandstone, 
  clay, 
  and 
  limestone, 
  occur- 
  

   ring 
  most 
  capriciously, 
  without 
  any 
  constant 
  order, 
  mixed 
  with 
  each 
  other 
  

   in 
  any 
  proportions, 
  and 
  often 
  highly 
  conglomeritic. 
  This 
  sub-division 
  (6) 
  

   is 
  the 
  most 
  frequent 
  at 
  the 
  boundary. 
  Under 
  it 
  there 
  occur 
  (c) 
  some 
  

   1,200 
  feet 
  of 
  pale 
  bright 
  brownish 
  yellow 
  and 
  bright 
  mottled 
  red 
  clays, 
  

   with 
  subordinate 
  bands 
  of 
  white 
  sandstone. 
  The 
  longitudinal 
  valley 
  of 
  

   the 
  lower 
  Denwa 
  is 
  excavated 
  in 
  these 
  beds. 
  There 
  are 
  many 
  good 
  

   sections, 
  none 
  better 
  than 
  in 
  the 
  Denwa 
  at 
  Moar, 
  showing 
  the 
  massive 
  

   Pachmari 
  sandstone 
  (d) 
  passing 
  with 
  a 
  dip 
  of 
  10° 
  beneath 
  the 
  base 
  of 
  

   these 
  clays, 
  and 
  passing 
  steadily 
  up 
  into 
  the 
  slope 
  of 
  the 
  ridge, 
  the 
  

   surface 
  of 
  which 
  slightly 
  undercuts 
  the 
  strata. 
  The 
  thickness 
  of 
  the 
  

   Pachmari 
  sandstones 
  is 
  very 
  great 
  ; 
  on 
  the 
  line 
  of 
  section 
  it 
  can 
  hardly 
  

   be 
  under 
  8,000 
  feet.* 
  

  

  The 
  Pachmaris 
  form 
  longitudinally 
  a 
  very 
  marked 
  physical 
  and 
  

  

  geological 
  division 
  of 
  the 
  central 
  portion 
  of 
  the 
  

   Pachmari 
  sandstone. 
  

  

  field, 
  between 
  the 
  Moran 
  and 
  Sitariva 
  terminal 
  

  

  areas. 
  The 
  detail-work 
  of 
  the 
  present 
  survey 
  has 
  as 
  yet 
  been 
  confined 
  

  

  to 
  the 
  northern 
  portion 
  ; 
  and 
  a 
  fuller 
  description 
  of 
  the 
  groups 
  already 
  

  

  mentioned 
  will 
  be 
  given 
  further 
  on. 
  The 
  southern 
  region 
  presents 
  

  

  greater 
  natural 
  difficulties, 
  but 
  some 
  indication 
  of 
  the 
  rock-structure 
  

  

  here 
  also 
  can 
  now 
  be 
  given 
  with 
  confidence, 
  based 
  upon 
  several 
  careful 
  

  

  traverses 
  of 
  the 
  ground. 
  

  

  The 
  Motur 
  range 
  has 
  not 
  the 
  aspect 
  so 
  common 
  in 
  these 
  hills 
  : 
  

  

  -r, 
  . 
  .. 
  „ 
  ,, 
  there 
  is 
  no 
  persistent 
  scarp. 
  Cliffs 
  occur 
  locally 
  at 
  

  

  Region 
  south 
  or 
  the 
  i 
  r 
  j 
  

  

  Pachman 
  range. 
  different 
  heights, 
  corresponding 
  to 
  the 
  outcrops 
  

  

  * 
  These 
  thicknesses, 
  of 
  course, 
  represent 
  time-thickness, 
  i. 
  e., 
  accumulated 
  successive 
  

   thickness 
  of 
  gradually 
  overlapping 
  strata 
  ; 
  such 
  as 
  would 
  have 
  to 
  be 
  taken 
  account 
  of 
  in 
  

   applying 
  any 
  rate 
  of 
  deposition 
  to 
  ascertain 
  the 
  time 
  represented 
  by 
  the 
  formation. 
  

  

  ( 
  no 
  ) 
  

  

  