﻿98 
  EOOTE 
  : 
  GEOLOGY 
  OF 
  MADRAS. 
  

  

  walls 
  of 
  the 
  numerous 
  very 
  large 
  circular 
  wells 
  in 
  that 
  neighbourhood. 
  

   Stone 
  fences 
  of 
  these 
  syenitic 
  flags 
  and 
  of 
  quartzite 
  boulders 
  are 
  very 
  

   characteristic 
  features 
  round 
  the 
  villages 
  adjoining 
  these 
  boulder-beds. 
  

  

  At 
  the 
  village 
  of 
  Attiput 
  (Oxapet 
  of 
  map) 
  very 
  large 
  quantities 
  

  

  of 
  these 
  syenitic 
  boulders 
  appear 
  to 
  have 
  been 
  

  

  At 
  Attiput. 
  .,.,.. 
  , 
  ,, 
  , 
  . 
  , 
  

  

  raised 
  in 
  digging 
  large 
  wells, 
  which 
  are 
  very 
  

  

  numerous 
  all 
  round 
  the 
  village, 
  and 
  applied 
  to 
  building 
  purposes 
  for 
  

  

  walls 
  of 
  all 
  kinds. 
  The 
  same 
  thing 
  is 
  seen 
  at 
  

  

  mjamu 
  Kinjamuttoor 
  on 
  the 
  western 
  edge 
  of 
  this 
  rather 
  

  

  elevated 
  plateau. 
  At 
  this 
  place, 
  as 
  at 
  Attiput, 
  these 
  boulders 
  appear 
  

  

  associated 
  with 
  a 
  bed 
  of 
  friable 
  grey, 
  or 
  drab, 
  sandstone 
  full 
  of 
  small 
  

  

  quartzite 
  pebbles, 
  with 
  others 
  of 
  jasper 
  and 
  slate. 
  The 
  few 
  wells 
  which 
  

  

  remain 
  unwalled 
  were 
  at 
  the 
  time 
  of 
  my 
  visit 
  so 
  full 
  of 
  water 
  that 
  I 
  

  

  could 
  not 
  ascertain 
  the 
  real 
  position 
  of 
  the 
  exposed 
  boulder-bed 
  relatively 
  

  

  to 
  the 
  Cavitpooram 
  conglomerate. 
  

  

  To 
  the 
  south 
  of 
  Pyanoor 
  indications 
  of 
  the 
  continuation 
  of 
  the 
  

  

  boulder-beds 
  occur 
  on 
  the 
  high 
  ground 
  south 
  of 
  

  

  mnamape 
  ^ 
  e 
  ra 
  {l 
  wa 
  y 
  near 
  Catramatoor 
  (close 
  to 
  the 
  Chin- 
  

  

  namapett 
  station), 
  where 
  occasional 
  rounded 
  blocks 
  of 
  granite 
  and 
  

  

  syenite 
  protrude 
  among 
  the 
  debris 
  of 
  lateritic 
  formation 
  by 
  which 
  the 
  

  

  surface 
  of 
  country 
  is 
  almost 
  universally 
  obscured. 
  

  

  In 
  the 
  railway 
  section 
  a 
  little 
  north 
  of 
  Chinnamapett 
  station 
  the 
  

   boulder-bed 
  is 
  exposed, 
  but 
  not 
  sufficiently 
  to 
  show 
  its 
  relations 
  to 
  the 
  

   underlying 
  sandstones 
  and 
  shales. 
  The 
  boulders 
  here 
  consist 
  chiefly 
  of 
  

   quartzite 
  and 
  are 
  unusually 
  small 
  in 
  size, 
  few, 
  if 
  any, 
  attaining 
  one 
  foot 
  in 
  

   diameter. 
  At 
  Moshoor 
  numerous 
  large 
  rounded 
  blocks 
  of 
  very 
  granitoid 
  

   gneiss 
  occur, 
  which 
  from 
  their 
  position 
  appear 
  to 
  have 
  been 
  once 
  included 
  

   in 
  the 
  friable 
  sandstones 
  which 
  were 
  deposited 
  over 
  this 
  part 
  of 
  the 
  

   country 
  and 
  in 
  great 
  part 
  again 
  removed 
  by 
  denudation. 
  Traces 
  of 
  very 
  

   friable 
  micaceous 
  sandstone 
  appear 
  to 
  occur 
  in 
  a 
  well 
  immediately 
  south 
  

  

  ( 
  98 
  ) 
  

  

  