﻿PRELIMINARY 
  NOTICE. 
  9 
  

  

  of 
  various 
  strong 
  beds 
  of 
  sandstone; 
  but, 
  as 
  a 
  whole, 
  the 
  surface 
  is 
  

   shelving 
  and 
  irregular, 
  indicating 
  alternations 
  of 
  soft 
  discontinuous 
  

   strata. 
  Earthy 
  sandstones 
  predominate; 
  but 
  there 
  are 
  frequent 
  thick 
  

   courses 
  of 
  gray, 
  brown, 
  and 
  dull 
  or 
  bright 
  red 
  clays 
  up 
  to 
  the 
  top 
  of 
  the 
  

   range. 
  The 
  dip 
  is 
  northerly, 
  often 
  as 
  high 
  as 
  15°, 
  and 
  all 
  the 
  rocks 
  are 
  

   identifiable 
  with 
  those 
  occurring 
  in 
  the 
  low 
  ground 
  along 
  the 
  base 
  of 
  

   the 
  range. 
  Carbonaceous 
  beds 
  are 
  found 
  in 
  both 
  positions. 
  With 
  such 
  

   a 
  steady 
  dip 
  all 
  the 
  rocks 
  of 
  the 
  ridge 
  are 
  soon 
  accounted 
  for 
  in 
  the 
  low 
  

   ground 
  ; 
  and 
  still 
  the 
  northerly 
  dip 
  continues, 
  bringing 
  in 
  higher 
  strata, 
  

   up 
  to 
  the 
  base 
  of 
  the 
  Pachmari 
  scarp. 
  There 
  is 
  a 
  flat 
  roll 
  of 
  the 
  strata 
  

   north 
  of 
  Bichberi 
  ; 
  but 
  making 
  full 
  allowance 
  for 
  this, 
  there 
  remain 
  

   some 
  3,000 
  to 
  4,000 
  feet 
  of 
  rocks 
  between 
  the 
  Motur 
  beds 
  and 
  the 
  

   Pachmari 
  sandstone. 
  There 
  is 
  a 
  general 
  resemblance 
  between 
  these 
  and 
  

   the 
  series 
  on 
  Motur 
  ; 
  but 
  I 
  believe 
  the 
  two 
  to 
  be 
  distinct. 
  In 
  the 
  upper 
  

   horizon 
  strong 
  sandstones, 
  partially 
  of 
  Pachmari 
  type, 
  are 
  predominant 
  ; 
  

   red 
  clays 
  are 
  rarer, 
  and 
  carbonaceous 
  ones 
  more 
  common 
  than 
  in 
  the 
  

   Moturs. 
  It 
  was 
  on 
  this 
  horizon, 
  in 
  ripple-marked 
  sandstones 
  alternat- 
  

   ing 
  with 
  thick 
  carbonaceous 
  shale, 
  at 
  Bijori, 
  that 
  the 
  Archegosaurus 
  

   was 
  found. 
  This 
  horizon, 
  or 
  tentative 
  group, 
  is 
  marked 
  as 
  (e) 
  on 
  

   the 
  section, 
  and 
  the 
  beds 
  of 
  Motur 
  as 
  (f). 
  South 
  of 
  the 
  range, 
  

   the 
  Motur 
  sandstone 
  and 
  red 
  clay, 
  again 
  with 
  a 
  northerly 
  dip, 
  continue 
  

   to 
  within 
  two 
  or 
  three 
  miles 
  of 
  the 
  boundary. 
  The 
  Barakar 
  group 
  

   was 
  not 
  detected 
  on 
  this 
  line 
  of 
  section, 
  close 
  to 
  the 
  watershed 
  between 
  

   the 
  Tawa 
  and 
  the 
  Kanhan; 
  it 
  may 
  be 
  overlapped. 
  Its 
  position 
  is 
  

   indicated 
  at 
  (g). 
  In 
  the 
  Pench, 
  some 
  twelve 
  miles 
  to 
  the 
  east 
  of 
  

   the 
  section, 
  the 
  coal 
  measures 
  are 
  brought 
  up 
  by 
  a 
  faulted 
  anticlinal 
  

   'flexure. 
  The 
  Talchirs 
  [h) 
  are 
  well 
  exposed 
  near 
  to 
  and 
  at 
  the 
  contact 
  

   with 
  the 
  gneiss, 
  very 
  much 
  crushed. 
  Regarding 
  these 
  southern 
  

   groups 
  also 
  further 
  remarks 
  will 
  be 
  made. 
  It 
  will 
  be 
  convenient, 
  

   and, 
  perhaps, 
  permanently 
  desirable, 
  to 
  continue 
  to 
  speak 
  of 
  the 
  three 
  

   groups, 
  5, 
  c, 
  and 
  d, 
  as 
  the 
  Mahadeva 
  series 
  ; 
  and 
  of 
  the 
  lower 
  ones, 
  

   e 
  ) 
  f) 
  9> 
  as 
  ^ 
  ne 
  Damuda 
  series. 
  

  

  b 
  ( 
  141 
  ) 
  

  

  