﻿JURASSIC 
  ROCKS 
  : 
  ALICOOR 
  AREA. 
  73 
  

  

  to 
  soft 
  friable 
  sandstone 
  rock 
  (including 
  quartzite 
  pebbles) 
  commences. 
  

  

  Non-compact 
  conglo- 
  but 
  the 
  chan 
  £ 
  e 
  ^ 
  most 
  P^bably 
  be 
  found 
  to 
  

   merates 
  - 
  have 
  taken 
  place 
  on 
  the 
  west 
  side 
  of 
  the 
  valley 
  

  

  lying 
  north-west 
  of 
  Hodson's 
  Pettah. 
  The 
  friable 
  sandstone 
  conglo- 
  

   merates 
  appear 
  to 
  underlie 
  the 
  hard 
  ferruginous 
  beds, 
  in 
  fact 
  they 
  must 
  

   do 
  so 
  unless 
  they 
  have 
  been 
  thrown 
  down 
  by 
  some 
  great 
  fault, 
  of 
  the 
  

   existence 
  of 
  which 
  no 
  evidence 
  was 
  observed. 
  

  

  The 
  conglomerate 
  beds 
  north 
  and 
  north-east 
  of 
  Alicoor 
  village 
  

  

  „ 
  , 
  , 
  •,,■,.., 
  consist 
  of 
  precisely 
  similar 
  materials, 
  and 
  are 
  

   battavedu 
  beds 
  in 
  the 
  r 
  J 
  ' 
  

  

  Alicoor 
  hills. 
  covered 
  up 
  similarly 
  in 
  most 
  places 
  by 
  debris. 
  

  

  It 
  is 
  only 
  at 
  the 
  summits 
  of 
  the 
  ridges 
  that 
  the 
  true 
  surfaces 
  can 
  be 
  

   readily 
  seen, 
  and 
  they 
  are 
  then 
  generally 
  so 
  rough 
  that 
  the 
  common 
  

   clinometer 
  is 
  of 
  no 
  use 
  in 
  ascertaining 
  the 
  true 
  dip. 
  

  

  The 
  most 
  westerly 
  outcrop 
  of 
  the 
  compact 
  conglomerate 
  occurs 
  

  

  . 
  , 
  about 
  two 
  miles 
  due 
  north 
  of 
  Hodson's 
  Pettah, 
  and 
  

   Alicoor 
  conglomerate 
  ' 
  

  

  beds 
  - 
  between 
  that 
  and 
  the 
  east 
  foot 
  of 
  the 
  hills, 
  at 
  

  

  least 
  eight 
  or 
  nine 
  other 
  conglomerate 
  beds 
  crop 
  out, 
  several 
  of 
  them 
  

   forming 
  considerable 
  scarps. 
  

  

  The 
  central 
  beds 
  are 
  the 
  thickest 
  and 
  form 
  the 
  highest 
  ridges 
  of 
  

   the 
  whole 
  group 
  of 
  hills 
  north 
  of 
  Alicoor. 
  

  

  The 
  highest 
  ridge 
  divides 
  in 
  two 
  near 
  the 
  centre 
  of 
  the 
  group, 
  and 
  a 
  

   deep 
  narrow 
  valley 
  is 
  formed 
  opening 
  south 
  near 
  Alicoor, 
  the 
  general 
  dis- 
  

   position 
  of 
  the 
  ridges 
  being 
  in 
  reality 
  considerably 
  different 
  from 
  what 
  is 
  

   shown 
  in 
  the 
  map. 
  The 
  scarp 
  forming 
  the 
  western 
  ridge 
  of 
  the 
  fork 
  is 
  

   the 
  outcrop 
  of 
  what 
  appears 
  to 
  be 
  the 
  fourth 
  great 
  bed 
  of 
  conglomerate 
  

   section 
  (p. 
  76). 
  Bed 
  No. 
  5 
  appears 
  on 
  the 
  east 
  side 
  of 
  the 
  valley 
  

   intervening 
  between 
  the 
  west 
  and 
  east 
  ridges, 
  and 
  gives 
  rise 
  to 
  tine 
  

   vertical 
  naked 
  cliffs 
  showing 
  a 
  thickness 
  of 
  unmixed 
  conglomerate 
  of 
  not 
  

   less 
  than 
  70 
  or 
  80 
  feet. 
  Bed 
  No. 
  6, 
  which 
  forms 
  the 
  eastern 
  and 
  princi- 
  

   pal 
  ridge, 
  is 
  of 
  lesser 
  magnitude, 
  but 
  the 
  bed 
  overlying 
  it 
  (No. 
  7) 
  is 
  

   k 
  ( 
  73 
  ) 
  

  

  