﻿402 
  

  

  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [June 
  8, 
  

  

  No. 
  

  

  Thick- 
  

   ness. 
  

  

  Description. 
  

  

  Fossils. 
  

  

  

  Inches. 
  

  

  

  

  21. 
  

  

  3-6 
  

  

  Dark 
  shale, 
  with 
  comminuted 
  

   Shells. 
  

  

  

  22. 
  

  

  

  Earthy 
  limestone, 
  dark 
  and 
  ir- 
  

   regular. 
  

  

  

  23. 
  

  

  

  Dark 
  shale, 
  with 
  shelly 
  layers. 
  

  

  Lima 
  precursor. 
  

   Modiola 
  minima. 
  

   Avicula 
  contorta. 
  

  

  24. 
  

  

  24 
  

  

  Pecten-bed 
  — 
  dark 
  earthy 
  lime- 
  

  

  Avicula 
  contorta. 
  

  

  

  

  stone, 
  irregularly 
  bedded, 
  and 
  

  

  Pecten 
  Valoniensis. 
  

  

  

  

  containing 
  irregular 
  layers 
  of 
  

  

  Placunopsis 
  alpina. 
  

  

  

  

  fibrous 
  carbonate 
  of 
  lime. 
  

  

  

  25. 
  

  

  

  Black 
  shale. 
  

  

  

  26. 
  

  

  3-4 
  

  

  Pecten-bed, 
  passing 
  into 
  compact 
  

  

  Avicula 
  contorta, 
  

  

  

  

  limestone. 
  

  

  Pecten 
  Valoniensis. 
  

   Cardium 
  Bhceticum. 
  

  

  27. 
  

  

  24 
  

  

  Black 
  shale. 
  

  

  

  28. 
  

  

  24 
  

  

  Earthy 
  limestone, 
  black, 
  with 
  

  

  Pleurophorus 
  elongatus. 
  

  

  

  

  layers 
  of 
  fibrous 
  carbonate 
  of 
  

  

  Pleurophorus 
  aiigulatus. 
  

  

  

  

  lime, 
  capped 
  with 
  a 
  fine 
  earthy 
  

  

  Axinus 
  cloacinus. 
  

  

  

  

  sandstone, 
  ripple-marked, 
  and 
  

  

  Pecten 
  Valoniensis. 
  

  

  

  

  containing 
  Devonian 
  pebbles. 
  

  

  Chemnitzia? 
  

   Chemnitzia 
  Henrici. 
  

  

  29. 
  

  

  

  Black 
  shale. 
  

  

  

  30. 
  

  

  8 
  

  

  Hard 
  blue 
  limestone. 
  

  

  

  31. 
  

  

  36 
  

  

  Dark 
  shale, 
  with 
  nodules. 
  

  

  

  32. 
  

  

  6 
  

  

  Two 
  beds 
  of 
  grey 
  lias. 
  

  

  

  33. 
  

  

  4 
  

  

  Indurated 
  shale. 
  

  

  

  34. 
  

  

  8 
  

  

  Two 
  beds 
  of 
  grey 
  lias. 
  

  

  

  35. 
  

  

  12 
  

  

  Shale. 
  

  

  

  36. 
  

  

  13 
  

  

  Three 
  beds 
  of 
  compact 
  bluish- 
  

   grey 
  limestone. 
  

  

  

  37. 
  

  

  

  Shale, 
  with 
  nodules. 
  

  

  

  38. 
  

  

  9 
  

  

  Grey 
  lias. 
  

  

  

  39. 
  

  

  

  Shale. 
  

  

  

  40. 
  

  

  7 
  

  

  Grey 
  lias. 
  

  

  Lima 
  pectinoides. 
  

  

  41. 
  

  

  

  Five 
  beds 
  of 
  grey 
  lias, 
  alternating 
  

   with 
  dark 
  shales. 
  

  

  

  From 
  this 
  point 
  to 
  the 
  fault 
  the 
  beds 
  are 
  too 
  much 
  disturbed 
  to 
  

   admit 
  of 
  any 
  accurate 
  determination. 
  Those 
  ranging 
  from 
  32 
  to 
  41, 
  

   inclusive, 
  contrast 
  strongly 
  with 
  the 
  arenaceous 
  beds 
  below, 
  in 
  their 
  

   poverty 
  of 
  organic 
  remains, 
  in 
  the 
  purity 
  of 
  the 
  limestone, 
  and 
  the 
  

   absence 
  of 
  sandstone. 
  There 
  can 
  be 
  little 
  doubt 
  that 
  they 
  represent 
  

   the 
  Wnite 
  Lias, 
  the 
  relative 
  position 
  of 
  which 
  they 
  occupy, 
  and 
  to 
  

   which 
  they 
  are 
  lithologically 
  allied. 
  

  

  3. 
  Coast 
  to 
  River 
  Parrett. 
  — 
  Along 
  the 
  coast 
  further 
  to 
  the 
  east 
  

   the 
  Avicula 
  contorta 
  series 
  is 
  exposed 
  in 
  the 
  cliff 
  at 
  St. 
  Audries, 
  

   and 
  yields 
  Acroclus 
  minimus, 
  A. 
  acutus, 
  Cardium 
  Rhazticum, 
  and 
  

   Avicula 
  contorta. 
  From 
  this 
  point 
  to 
  the 
  mouth 
  of 
  the 
  Parrett, 
  

   though 
  faults 
  are 
  very 
  numerous, 
  there 
  are 
  no 
  good 
  Ehaetic 
  sections 
  

   exposed. 
  

  

  4. 
  Outliers 
  of 
  Wedmore 
  and 
  Pen 
  Knowle. 
  — 
  On 
  the 
  north-east 
  side 
  

   of 
  the 
  great 
  triangular 
  Liassic 
  outlier 
  of 
  Wedmore 
  we 
  again 
  meet 
  

  

  