﻿JURASSIC 
  ROCKS. 
  65 
  

  

  The 
  upper 
  group 
  of 
  the 
  Rajmahal 
  series 
  includes 
  the 
  upper 
  and 
  

   larger 
  part 
  of 
  the 
  conglomerates, 
  and 
  consists 
  almost 
  entirely 
  of 
  such 
  

   conglomerates, 
  and 
  may 
  advantageously 
  be 
  called 
  the 
  Sattavedu 
  group. 
  

  

  The 
  second 
  group 
  contains 
  the 
  underlying 
  members 
  of 
  the 
  series, 
  the 
  

   upper 
  part 
  of 
  which 
  is 
  a 
  shale 
  formation 
  occupying 
  everywhere 
  apparently 
  

   the 
  same 
  horizon 
  as 
  do 
  the 
  Sripermatoor 
  shales. 
  

  

  As 
  these 
  shales 
  are 
  also 
  the 
  most 
  important 
  member 
  of 
  the 
  lower 
  

  

  division 
  of 
  the 
  Rajmahal 
  rocks, 
  a 
  more 
  appro 
  - 
  

   Sripermatoor 
  group. 
  - 
  

  

  priate 
  name 
  could 
  not 
  well 
  be 
  given 
  to 
  the 
  lower 
  

  

  division 
  than 
  to 
  call 
  it 
  the 
  Sripermatoor 
  group. 
  

  

  Of 
  the 
  four 
  principal 
  areas 
  before 
  named, 
  the 
  most 
  northerly, 
  i. 
  e. 
  } 
  the 
  

   area 
  occupied 
  by 
  the 
  Sattavedu 
  hills, 
  is 
  occupied 
  

  

  Definition 
  of 
  the 
  four 
  

  

  principal 
  areas. 
  by 
  great 
  beds 
  of 
  compact 
  conglomerate 
  mixed 
  

  

  Sattavedu 
  area. 
  ^^ 
  a 
  few 
  bedg 
  of 
  CQarge 
  sandstone< 
  

  

  The 
  northern 
  -central, 
  or 
  Alicoor 
  area, 
  shows 
  a 
  series 
  of 
  compact 
  

   conglomerates 
  with 
  a 
  few 
  small 
  beds 
  of 
  sandstone 
  

  

  Ahcoor 
  area. 
  resting 
  on 
  non-compact 
  conglomerates, 
  with 
  in- 
  

  

  cluded 
  beds 
  of 
  clayey 
  grits 
  and 
  sandstone 
  and 
  sandy 
  shales, 
  which 
  latter 
  

   pass 
  into 
  true 
  shales 
  and 
  shaley 
  clays 
  in 
  the 
  eastern 
  part 
  of 
  the 
  area. 
  

  

  The 
  southern-central, 
  or 
  Pyanoor 
  area, 
  includes 
  the 
  various 
  form- 
  

   ations 
  of 
  the 
  Rajmahal 
  series 
  lving 
  within 
  the 
  

  

  Pyanoor 
  area. 
  angle 
  hrme& 
  by 
  the 
  junction 
  of 
  the 
  Naggery 
  and 
  

  

  Corteliar 
  rivers. 
  The 
  prevailing 
  rocks 
  here 
  are 
  friable 
  shales 
  and 
  sand- 
  

   stones, 
  and 
  uncompacted 
  conglomerates 
  and 
  boulder-beds, 
  all 
  of 
  which 
  

   apparently 
  belong 
  to 
  the 
  lower 
  or 
  Sripermatoor 
  group. 
  

  

  The 
  southernmost 
  of 
  the 
  four 
  areas 
  is 
  occupied 
  mainly 
  by 
  an 
  im- 
  

   portant 
  shale 
  formation 
  resting 
  on 
  gritty 
  sandstone. 
  

   Sripermatoor 
  area. 
  Thege 
  glialeg 
  are 
  distinguished 
  as 
  the 
  Sripermatoor 
  

   shales 
  from 
  the 
  small 
  town 
  of 
  that 
  name 
  at 
  which 
  they 
  were 
  first 
  met 
  

   i 
  ( 
  65 
  ) 
  

  

  