﻿59 
  

  

  Chapter 
  VI. 
  — 
  The 
  Cuddalore 
  series. 
  

   The 
  rocks 
  referred 
  to 
  this 
  series 
  offer 
  no 
  fossil 
  remains 
  of 
  any 
  kind 
  

   whatever 
  by 
  which 
  to 
  establish 
  their 
  geological 
  age, 
  and 
  it 
  is 
  on 
  strati- 
  

   graphical 
  evidence 
  only 
  that 
  they 
  are 
  separated 
  both 
  from 
  the 
  under- 
  

   lying 
  Rajmahal 
  rocks 
  and 
  the 
  overlying 
  laterite. 
  

  

  As 
  already 
  pointed 
  out 
  in 
  the 
  introductory 
  chapter, 
  these 
  rocks 
  

   are 
  exposed 
  only 
  to 
  a 
  limited 
  extent 
  in 
  a 
  few 
  sections 
  lying 
  in 
  or 
  near 
  

   the 
  banks 
  of 
  the 
  Corteliar 
  river, 
  a 
  little 
  west 
  of 
  the 
  ford 
  crossed 
  by 
  

   the 
  Madras-Nellore 
  high 
  road. 
  In 
  all 
  these 
  sections 
  the 
  mineral 
  charac- 
  

   ters 
  of 
  the 
  rocks 
  are 
  the 
  same, 
  viz., 
  friable, 
  white, 
  and 
  red 
  mottled 
  grit 
  

   overlying 
  a 
  friable 
  quartzose 
  grit 
  of 
  buffy 
  -white 
  and 
  brown 
  colors 
  be- 
  

   coming 
  whiter 
  downwards. 
  

  

  The 
  best 
  section 
  occurs 
  on 
  the 
  western 
  scarp 
  of 
  a 
  low 
  hill 
  lying 
  

   Sections 
  on 
  the 
  Corte- 
  immediately 
  south 
  of 
  the 
  village 
  of 
  Yerumeivetti- 
  

   paleiyam 
  (Yermootapolliam 
  of 
  sheet 
  78) 
  on 
  the 
  

   right 
  bank 
  of 
  the 
  Corteliar 
  river. 
  

  

  The 
  section 
  here 
  seen 
  presents 
  the 
  following 
  succession 
  of 
  beds 
  : 
  — 
  

  

  Lateritic 
  conglomerate 
  ... 
  ... 
  ... 
  3 
  ft. 
  to 
  4 
  ft. 
  

  

  Mottled 
  grits 
  ... 
  ... 
  ... 
  ... 
  6 
  

  

  Quartzose 
  grit 
  of 
  buffy-white 
  and 
  brown 
  colors, 
  be- 
  \ 
  

  

  coming 
  whiter 
  and 
  coarser 
  grained 
  downwards 
  ; 
  very 
  > 
  30 
  — 
  40 
  

   friable 
  ; 
  beds 
  divided 
  by 
  thin 
  partings 
  of 
  kunkur. 
  ) 
  

  

  Dip 
  2°-3° 
  S. 
  E. 
  to 
  S. 
  E. 
  by 
  S. 
  

  

  The 
  same 
  succession 
  of 
  beds 
  may 
  also 
  be 
  traced 
  all 
  along 
  the 
  line 
  

   of 
  cliffs 
  commencing 
  about 
  | 
  of 
  a 
  mile 
  east-north-east 
  of 
  Yerumeivetti- 
  

   paleiyam 
  and 
  running 
  north 
  for 
  about 
  three-fourths 
  of 
  a 
  mile 
  along 
  the 
  

   right 
  bank 
  of 
  the 
  river, 
  and 
  rising 
  sheer 
  for 
  50 
  to 
  60 
  feet 
  and 
  upwards 
  

   above 
  the 
  water. 
  The 
  base 
  of 
  this 
  fine 
  section 
  is 
  unfortunately 
  obscured 
  

   by 
  a 
  talus 
  of 
  fallen 
  masses, 
  and 
  the 
  river 
  here 
  forms 
  a 
  deep 
  perennial 
  

   pool, 
  nor 
  is 
  there 
  any 
  section 
  that 
  I 
  am 
  acquainted 
  with 
  where 
  these 
  

   rocks 
  may 
  be 
  seen 
  in 
  contact 
  with 
  the 
  Rajmahal 
  rocks. 
  

  

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  59 
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