﻿THE 
  LATERITIC 
  FORMATIONS. 
  33 
  

  

  but 
  rarely 
  reach 
  a 
  size 
  sufficient 
  to 
  merit 
  the 
  name 
  of 
  boulders. 
  In 
  

   these 
  there 
  is 
  also 
  the 
  same 
  decrease 
  in 
  the 
  size 
  of 
  the 
  pebbles, 
  with 
  little 
  

   of 
  the 
  lateritic 
  cement 
  visible 
  on 
  the 
  surface. 
  In 
  the 
  well-sections 
  the 
  

   cement 
  sometimes 
  becomes 
  apparent, 
  and 
  occasionally 
  also 
  forms 
  blocks 
  

   exposed 
  on 
  the 
  surface 
  or 
  in 
  rain 
  channels. 
  

  

  Frequently 
  the 
  position 
  only 
  of 
  the 
  shingle 
  bed, 
  and 
  the 
  occurrence 
  of 
  

   Near 
  Chmnamapett 
  stone 
  im 
  P 
  lem 
  ents, 
  indicate 
  the 
  real 
  age. 
  Such 
  is 
  

  

  station 
  and 
  Catramatoor. 
  the 
  cage 
  with 
  regard 
  to 
  the 
  sh 
  i 
  ng 
  l 
  e 
  bedg 
  gouth 
  q£ 
  

  

  Catramatoor 
  near 
  the 
  Chinnamapett 
  railway 
  station, 
  and 
  with 
  those 
  

  

  (three 
  in 
  number) 
  east 
  of 
  Tukkoolum. 
  

  

  A 
  very 
  great 
  part 
  of 
  the 
  lateritic 
  formations 
  lying 
  both 
  between 
  

  

  the 
  Corteliar 
  and 
  Narnaveram 
  rivers, 
  and 
  to 
  

   " 
  Boulder 
  beds" 
  near 
  

  

  and 
  around 
  Alicoor 
  and 
  the 
  north 
  of 
  the 
  latter, 
  consists 
  of 
  the 
  extraordi- 
  

  

  Sattavedu 
  hills. 
  

  

  narily 
  coarse 
  conglomerate 
  referred 
  to 
  above. 
  

   The 
  coarseness 
  of 
  these 
  conglomerates, 
  which 
  is 
  often 
  so 
  great 
  as 
  almost 
  

   to 
  merit 
  the 
  appellation 
  of 
  ' 
  boulder 
  beds/ 
  seems 
  to 
  increase 
  with 
  their 
  

   proximity 
  to 
  the 
  older 
  conglomerates 
  of 
  the 
  Rajmahal 
  system, 
  which 
  

   compose 
  the 
  main 
  mass 
  of 
  the 
  Sattavedu 
  and 
  Alicoor 
  hills. 
  The 
  diffi- 
  

   culty 
  of 
  distinguishing 
  between 
  the 
  series 
  of 
  conglomerates 
  when 
  wea- 
  

   thered 
  need 
  not 
  again 
  be 
  touched 
  upon. 
  

  

  The 
  most 
  extraordinarily 
  coarse 
  example 
  of 
  true 
  conglomerate 
  was 
  

   „ 
  , 
  noticed 
  in 
  a 
  well-section 
  a 
  little 
  north-west 
  of 
  

  

  Coarse 
  conglomerate 
  

   near 
  Sattavedu. 
  Callapanaidoopettah 
  near 
  Sattavedu. 
  Here 
  the 
  

  

  bed 
  is 
  fully 
  12 
  feet 
  thick, 
  and 
  consists 
  of 
  very 
  large 
  rounded 
  masses 
  of 
  

  

  quartzite 
  cemented 
  together 
  with 
  true 
  lateritic 
  cement. 
  Towards 
  the 
  

  

  middle 
  and 
  base 
  of 
  the 
  section 
  several 
  small 
  beds 
  of 
  typical 
  laterite 
  are 
  

  

  intercalated, 
  contrasting 
  strongly 
  with 
  the 
  coarse 
  conglomerate. 
  The 
  real 
  

  

  base 
  of 
  the 
  section 
  was 
  covered 
  by 
  the 
  water 
  in 
  the 
  well. 
  

  

  South 
  of 
  the 
  Narnaveram 
  river 
  is 
  an 
  immensely 
  coarse 
  laterite 
  

  

  c 
  , 
  „ 
  shingle 
  occurring 
  at 
  Benaloor 
  and 
  Goompol- 
  

  

  the 
  Narnaveram 
  river. 
  j^ 
  and 
  etching 
  Up 
  to 
  the 
  foot 
  of 
  the 
  

   E 
  ( 
  33 
  ) 
  

  

  