﻿44 
  

  

  EOOTE 
  : 
  GEOLOGY 
  OF 
  MADRAS. 
  

  

  at 
  the 
  village 
  of 
  Attrampakkam 
  in 
  the 
  Trivellore 
  taluq. 
  In 
  the 
  upper 
  

   part 
  of 
  the 
  shallow 
  valley 
  through 
  which 
  the 
  nullah 
  flows 
  is 
  a 
  large 
  tank, 
  

   near 
  the 
  village 
  of 
  Numbaucum, 
  which 
  on 
  several 
  occasions 
  has 
  burst 
  its 
  

   bund 
  and 
  thereby 
  given 
  rise 
  to 
  the 
  formation 
  of 
  large 
  and 
  deep 
  gullies 
  

   leading 
  down 
  to 
  the 
  bed 
  of 
  the 
  nullah. 
  In 
  these 
  gullies 
  the 
  laterite 
  

   beds 
  in 
  which 
  the 
  implements 
  were 
  found 
  are 
  extremely 
  well 
  exposed. 
  

  

  Close 
  to 
  the 
  kalingula 
  or 
  waste-weir 
  of 
  the 
  .tank 
  stands 
  an 
  old 
  

   pagoda 
  in 
  ruins, 
  just 
  below 
  which, 
  at 
  the 
  deepest 
  part 
  of 
  the 
  gully, 
  the 
  

   following 
  section 
  is 
  exposed 
  : 
  — 
  

  

  a, 
  — 
  Soil 
  and 
  made 
  ground 
  

  

  Zl 
  — 
  Lateritic 
  conglomerate 
  with 
  layers 
  of 
  quartzite 
  pebbles 
  

  

  c. 
  — 
  Sandy 
  clay 
  with 
  quartzite 
  pebbles 
  and 
  kunkur 
  in 
  strings 
  

  

  d, 
  — 
  Lateritic 
  conglomerate 
  full 
  of 
  quartzite 
  pebbles 
  

  

  e. 
  — 
  Grey 
  shales 
  (plant 
  shales) 
  with 
  ferruginous 
  stains 
  

  

  The 
  annexed 
  cut 
  is 
  a 
  rough 
  sketch 
  of 
  this 
  section 
  :— 
  

  

  

  Ft. 
  

  

  Id. 
  Ft. 
  

  

  In. 
  

  

  6 
  

  

  OtoO 
  

  

  

  

  1 
  

  

  6 
  „ 
  3 
  

  

  

  

  5 
  

  

  6 
  „ 
  6 
  

  

  6 
  

  

  3 
  

  

  „ 
  

  

  8 
  

  

  1 
  

  

  6 
  „ 
  

  

  

  

  3. 
  

  

  

  Fig. 
  1.— 
  Sketch 
  of 
  section 
  in 
  bank 
  of 
  stream 
  at 
  north 
  end 
  of 
  Numhaueum 
  tank. 
  

  

  A 
  few 
  yards 
  to 
  the 
  west 
  of 
  the 
  ruined 
  pagoda 
  these 
  beds 
  are 
  exposed 
  

   in 
  a 
  shallower 
  gully 
  down 
  to 
  the 
  top 
  of 
  d. 
  Here 
  sticking 
  in 
  the 
  sandy 
  

   clay 
  bed 
  c 
  a 
  few 
  inches 
  above 
  the 
  top 
  of 
  d 
  I 
  found 
  a 
  well 
  made 
  hatchet- 
  

   shaped 
  implement. 
  This 
  implement 
  appeared 
  to 
  be 
  truly 
  in 
  sit% 
  } 
  about 
  

  

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  44 
  ) 
  

  

  