﻿JURASSIC 
  ROCKS 
  : 
  SRIPERMATOOR 
  AREA. 
  119 
  

  

  the 
  possibility 
  of 
  their 
  being 
  remains 
  of 
  a 
  southward 
  extension 
  of 
  the 
  

   boulder-beds 
  of 
  the 
  Pyanoor 
  area 
  west 
  of 
  the 
  Corteliar. 
  The 
  origin 
  

   of 
  these 
  boulders 
  is 
  not 
  made 
  clearer 
  by 
  the 
  fact 
  that 
  some 
  of 
  them 
  

   have 
  been 
  used 
  to 
  form 
  the 
  Kurumbar 
  rings 
  on 
  the 
  high 
  ground 
  

   adjacent, 
  still, 
  as 
  most 
  of 
  the 
  Kurumbar 
  rings 
  and 
  kistvaens 
  in 
  this 
  

   immediate 
  neighbourhood, 
  e. 
  g., 
  at 
  Palnalur 
  and 
  Kunduperrum, 
  have 
  

   been 
  formed 
  of 
  massive 
  laterite, 
  it 
  seems 
  unlikely 
  that 
  the 
  old 
  Kurum- 
  

   bars 
  should 
  have 
  gone 
  six 
  or 
  eight 
  miles 
  for 
  granite 
  boulders 
  on 
  the 
  

   high 
  ground 
  of 
  Tukkolum, 
  when 
  an 
  abundant 
  supply 
  of 
  the 
  finest 
  

   laterite 
  occurs 
  only 
  a 
  mile 
  to 
  the 
  east 
  of 
  Arryapaucum. 
  

  

  The 
  first 
  outlier 
  of 
  beds, 
  probably 
  belonging 
  to 
  the 
  Rajmahal 
  

  

  series, 
  was 
  met 
  with 
  at 
  Cotrumbaucum 
  one 
  and 
  half 
  

   Outlying 
  sections 
  west 
  

  

  of 
  the 
  Sripermatoor 
  area, 
  mile 
  north-north-west 
  of 
  the 
  Rajah's 
  Choultry 
  

  

  on 
  the 
  Madras-Arcot 
  road. 
  Very 
  friable, 
  highly 
  

   Cotrumbaucum 
  section. 
  

  

  micaceous 
  brown 
  sandstone 
  is 
  here 
  exposed 
  in 
  the 
  

  

  sides 
  of 
  the 
  new 
  square 
  tank 
  south 
  of 
  the 
  village, 
  which 
  stands 
  on 
  high 
  

  

  ground. 
  Obscure 
  vegetable 
  markings 
  occur 
  sometimes 
  in 
  the 
  sandstone, 
  

  

  but 
  are 
  of 
  too 
  rude 
  a 
  character 
  to 
  be 
  recognized. 
  The 
  tank 
  was 
  too 
  

  

  full 
  of 
  water 
  to 
  see 
  anything 
  more 
  than 
  the 
  very 
  top 
  of 
  the 
  bed. 
  

  

  The 
  second 
  of 
  these 
  out-crops 
  was 
  met 
  with 
  about 
  a 
  mile 
  south-west 
  

  

  of 
  the 
  Rajah's 
  Choultry 
  on 
  the 
  Madras-Arcot 
  

  

  Rajah's 
  Choultry 
  -, 
  j 
  i/?iii 
  ^ 
  jt 
  r> 
  

  

  section. 
  road, 
  and 
  a 
  couple 
  or 
  hundred 
  yards 
  south 
  of 
  

  

  where 
  the 
  road 
  to 
  Little 
  Conjeveram 
  crosses 
  

  

  the 
  principal 
  feeder 
  of 
  the 
  great 
  Tennary 
  tank. 
  Tae 
  section 
  is 
  seen 
  

  

  in 
  a 
  large 
  shallow 
  rain 
  gully 
  running 
  down 
  into 
  the 
  feeding 
  channel, 
  

  

  and 
  is 
  nowhere 
  more 
  than 
  2 
  J 
  or 
  3|- 
  feet 
  in 
  depth. 
  Very 
  friable 
  

  

  sandstones 
  and 
  brownish 
  buff-colored 
  grits 
  resting 
  on 
  fine 
  sandy 
  clay, 
  

  

  with 
  an 
  apparent 
  general 
  dip 
  of 
  3° 
  to 
  5° 
  north, 
  crop 
  out 
  in 
  the 
  sides 
  and 
  

  

  bed 
  of 
  the 
  gully. 
  The 
  beds 
  roll 
  a 
  good 
  deal, 
  and 
  no 
  measurable 
  dip 
  

  

  was 
  seen. 
  In 
  one 
  of 
  the 
  lateral 
  gullies, 
  a 
  flat 
  oval 
  mass 
  of 
  rather 
  

  

  gritty 
  sandstone 
  about 
  4 
  feet 
  long 
  and 
  3| 
  feet 
  wide, 
  of 
  grey 
  color 
  is 
  

  

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  119 
  /) 
  ' 
  

  

  