﻿JURASSIC 
  ROCKS 
  : 
  ALTCOOR 
  AREA. 
  91 
  

  

  Iii 
  the 
  valley 
  of 
  the 
  nullah 
  falling 
  into 
  the 
  Corteliar 
  at 
  Odapei 
  (Odipee 
  

  

  of 
  sheet 
  78) 
  the 
  shales 
  show 
  everywhere 
  the 
  same 
  

   Odapei 
  section. 
  

  

  whitish 
  color 
  variegated 
  by 
  a 
  few 
  thin 
  ferruginous, 
  

   or 
  sandstone, 
  partings 
  of 
  brown, 
  yellow, 
  red 
  and 
  purple 
  tints. 
  

  

  The 
  beds 
  roll 
  similarly 
  to 
  all 
  points 
  of 
  the 
  compass 
  at 
  low 
  angles, 
  so 
  

   that 
  none 
  of 
  the 
  sections 
  cut 
  through 
  to 
  the 
  underlying 
  rocks, 
  whatever 
  

   they 
  may 
  be. 
  

  

  Opposite 
  the 
  village 
  of 
  Odapei, 
  a 
  little 
  above 
  the 
  junction 
  of 
  the 
  

   nullah 
  with 
  the 
  Corteliar, 
  is 
  a 
  small 
  cliff 
  about 
  16 
  feet 
  high, 
  about 
  12 
  feet 
  

   of 
  which 
  is 
  made 
  up 
  of 
  white 
  shales, 
  with 
  three 
  or 
  four 
  partings 
  of 
  slightly 
  

   ferruginous 
  sandstone, 
  each 
  4 
  to 
  6 
  inches 
  thick. 
  The 
  shales 
  are 
  capped 
  by 
  

   lateritic 
  gravel 
  and 
  soil 
  3 
  to 
  5 
  feet 
  in 
  thickness. 
  This 
  is 
  the 
  most 
  important 
  

   section 
  of 
  the 
  shales 
  in 
  this 
  small 
  valley. 
  Several 
  others 
  of 
  lesser 
  magnitude 
  

   occur 
  further 
  north 
  near 
  Govindarajapuram 
  and 
  Mylapur. 
  In 
  the 
  valley 
  

   of 
  the 
  Meyyur 
  nullah 
  the 
  shales 
  are 
  only 
  seen 
  in 
  a 
  few 
  spots 
  where 
  the 
  

   surface 
  has 
  been 
  cleanly 
  swept 
  by 
  heavy 
  rains, 
  and 
  no 
  points 
  of 
  any 
  in- 
  

   terest 
  whatever 
  were 
  noticed. 
  Fossils 
  appear 
  to 
  be 
  rare 
  in 
  these 
  shales, 
  

   for 
  I 
  found 
  none 
  at 
  all 
  in 
  the 
  two 
  localities 
  just 
  named. 
  

  

  South 
  of 
  the 
  Corteliar, 
  following 
  the 
  line 
  of 
  the 
  western 
  boundary 
  

  

  n„ 
  ne 
  i 
  j-v 
  a 
  of 
  the 
  several 
  lateritic 
  areas, 
  slight 
  indications 
  of 
  

  

  Doubtful 
  outliers 
  soutb 
  ' 
  » 
  

  

  of 
  Corteliar. 
  shaly 
  beds 
  of 
  yellowish 
  white 
  color 
  were 
  observed 
  

  

  among 
  debris 
  thrown 
  out 
  of 
  tank 
  bottoms 
  in 
  several 
  places 
  — 
  the 
  first 
  close 
  

   to 
  the 
  Choultry 
  standing 
  at 
  the 
  edge 
  of 
  the 
  alluvium 
  about 
  two 
  miles 
  

  

  south 
  of 
  Kallikuppam 
  (Calicoopum 
  of 
  map) 
  ; 
  here 
  

   At 
  Kallikuppam. 
  . 
  ... 
  

  

  the 
  shell 
  debris 
  was 
  mixed 
  with 
  tesselated 
  con- 
  

   cretionary 
  clay-ironstone. 
  

  

  Two 
  miles 
  further 
  south 
  along 
  the 
  edge 
  of 
  the 
  boundary, 
  debris 
  

  

  of 
  whitish 
  shales, 
  here 
  and 
  there 
  iron 
  stained, 
  is 
  

   At 
  Mittanemalei. 
  ,. 
  n 
  .. 
  „ 
  n1 
  , 
  . 
  . 
  

  

  seen 
  in 
  the 
  bund 
  ot 
  a 
  small 
  tank 
  lying 
  a 
  little 
  

  

  distance 
  north-west 
  of 
  Mittanemalei 
  village 
  (Metnavilly 
  of 
  Atlas 
  sheet) 
  . 
  

  

  ( 
  91 
  ) 
  

  

  