﻿108 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Dec. 
  2, 
  

  

  Section 
  of 
  the 
  White 
  Lias 
  in 
  Colin 
  Glen 
  (above 
  the 
  section 
  on 
  p. 
  105). 
  

  

  Lower 
  Lias 
  resting 
  on 
  ft. 
  in. 
  

  

  5. 
  Arenaceous 
  Marls 
  with 
  Cardium 
  Mhceticum 
  . 
  . 
  10 
  

  

  6. 
  White 
  Limestone 
  4 
  

  

  7. 
  Grey 
  Marls 
  6 
  

  

  8. 
  Red 
  Marls 
  9 
  

  

  9. 
  Grey 
  Arenaceous 
  Shales, 
  passing 
  down 
  into 
  

  

  No. 
  10, 
  with 
  Axinus 
  cloacinus, 
  Cardium 
  Hho3- 
  

   ticum, 
  Sfc 
  10 
  

  

  26 
  4 
  

  

  The 
  section 
  at 
  Cave 
  Hill 
  is 
  complicated 
  by 
  the 
  intrusion 
  of 
  a 
  large 
  

   trap-dyke 
  (see 
  fig. 
  2). 
  I 
  have 
  made 
  out 
  the 
  following 
  succession 
  : 
  — 
  

  

  Section 
  of 
  the 
  White 
  Lias 
  at 
  Cave 
  Hill 
  (above 
  the 
  section 
  on 
  p. 
  105). 
  

  

  ft. 
  in. 
  

  

  1. 
  Indurated 
  Shales, 
  fossiliferous 
  8 
  6 
  

  

  2. 
  Indurated 
  Shales, 
  unfossiliferous 
  . 
  .* 
  1 
  10 
  

  

  3. 
  Indurated 
  Marls, 
  exhibiting 
  an 
  oolitic 
  struc- 
  

  

  ture, 
  which 
  disappears 
  6 
  feet 
  from 
  dyke 
  : 
  no 
  

  

  fossils 
  3 
  10 
  

  

  4. 
  Unseen, 
  about 
  (4 
  0) 
  

  

  5. 
  Black 
  Shales 
  of 
  Section, 
  p. 
  105 
  

  

  14 
  2 
  

  

  Pig. 
  2. 
  — 
  Section 
  at 
  Cave 
  Hill. 
  

  

  5 
  

   aiA 
  Tramway 
  

   Blue 
  Marls. 
  

   [For 
  the 
  Explanation 
  of 
  the 
  figures 
  see 
  above.] 
  

  

  At 
  some 
  distance 
  from 
  the 
  above 
  section 
  the 
  following 
  beds, 
  in 
  

   descending 
  order, 
  appear 
  as 
  resting 
  upon 
  the 
  same 
  dyke 
  : 
  — 
  

  

  1. 
  Gault. 
  

  

  ft. 
  in. 
  

  

  2. 
  Marly 
  Shales 
  with 
  the 
  fossils 
  of 
  No. 
  1 
  in 
  the 
  pre- 
  

  

  vious 
  section 
  8 
  10 
  

  

  3. 
  Micaceous 
  Sandstone 
  2 
  

  

  