﻿50 
  MEDLICOTT 
  : 
  SATPURA 
  COAL-BASIN. 
  

  

  the 
  main 
  trappean 
  area 
  to 
  the 
  south. 
  The 
  sections 
  do 
  not 
  admit 
  of 
  

   determining 
  to 
  what 
  part 
  of 
  the 
  trappean 
  period 
  these 
  sheets 
  belong- 
  ; 
  

   probably 
  to 
  the 
  close 
  of 
  the 
  eruptive 
  action, 
  when 
  a 
  great 
  mass 
  of 
  

   tough 
  rock 
  had 
  accumulated 
  on 
  the 
  surface, 
  so 
  as 
  to 
  obstruct 
  the 
  free 
  

   outflow 
  of 
  later 
  eruptions. 
  But 
  the 
  rock 
  of 
  these 
  intrusions 
  is 
  the 
  same 
  

   rough 
  dolerite 
  that 
  prevails 
  in 
  the 
  flows 
  on 
  the 
  surface. 
  

  

  The 
  relations 
  I 
  have 
  exhibited 
  between 
  the 
  trap 
  and 
  the 
  sediment- 
  

   aries 
  imply, 
  according 
  to 
  all 
  usual 
  modes 
  of 
  interpretation, 
  a 
  great 
  

   lapse 
  of 
  time 
  between 
  the 
  Jabalpur 
  beds 
  and 
  the 
  advent 
  of 
  the 
  Deccan 
  

   trap. 
  

  

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