﻿BEER 
  HEAD 
  AND 
  THE 
  ADJACENT 
  CLIFF-SECTIONS. 
  373 
  

  

  At 
  White 
  Cliff 
  these 
  fossils 
  occur 
  only 
  as 
  casts 
  and 
  impressions 
  in 
  

   the 
  indurated 
  nodules. 
  At 
  Branscombe 
  some 
  of 
  them 
  are 
  more 
  

   perfect. 
  At 
  Peak 
  Hill, 
  where 
  the 
  condition 
  of 
  the 
  bed 
  is 
  slightly- 
  

   different, 
  many 
  of 
  the 
  species 
  occur 
  precisely 
  as 
  at 
  Black 
  down, 
  the 
  

   shell 
  itself 
  having 
  been 
  replaced 
  by 
  chalcedony. 
  

  

  De 
  La 
  Beche* 
  has 
  recorded 
  many 
  other 
  species 
  as 
  having 
  been 
  

   obtained 
  from 
  this 
  bed 
  at 
  White 
  Cliff 
  ; 
  and 
  he 
  was 
  also 
  one 
  of 
  the 
  

   first 
  to 
  point 
  out 
  their 
  resemblance 
  to 
  the 
  Blackdown 
  fauna. 
  

  

  Bed 
  3. 
  — 
  Buff- 
  coloured 
  and 
  greyish 
  marly 
  sands, 
  with 
  large, 
  

   rounded, 
  and 
  spongiform 
  concretions. 
  

  

  Thickness 
  variable 
  : 
  40 
  ft. 
  at 
  White 
  Cliff, 
  30 
  ft. 
  at 
  Branscombe, 
  

   25 
  ft. 
  at 
  Dunscombe, 
  20 
  ft. 
  at 
  Salcombe. 
  

  

  Fossils 
  scarce. 
  

  

  Fossils 
  : 
  — 
  

  

  Exogyra 
  conica, 
  Sow 
  White 
  Cliff. 
  

  

  laevigata, 
  Sow 
  „ 
  Branscombe, 
  &c. 
  

  

  Pecten 
  orbicularis, 
  Sow. 
  (var.) 
  „ 
  Axmouth. 
  

  

  This 
  bed 
  may 
  be 
  seen 
  at 
  White 
  Cliff 
  and 
  in 
  all 
  the 
  sections 
  from 
  

   Branscombe 
  westward 
  to 
  High 
  Peak. 
  

  

  Bed 
  4. 
  — 
  Light-coloured, 
  yellowish, 
  and 
  slightly 
  marly 
  sands, 
  with 
  

   irregular 
  concretions. 
  

  

  Thickness 
  about 
  20 
  ft. 
  : 
  25 
  ft. 
  at 
  White 
  Cliff 
  (?), 
  20 
  ft. 
  at 
  Beer 
  

   Head, 
  25 
  ft. 
  at 
  Dunscombe. 
  

  

  Prevailing 
  fossils 
  — 
  Exogyra 
  columba, 
  Lam., 
  and 
  Janira 
  quadri- 
  

   costata, 
  Sow. 
  

  

  A 
  shingle-bed 
  or 
  layer 
  of 
  sandstone 
  pebbles, 
  mingled 
  with 
  the 
  

   broken 
  valves 
  of 
  Pecten 
  and 
  Exogyra, 
  occurs 
  in 
  the 
  upper 
  part 
  of 
  

   these 
  sands 
  at 
  White 
  Cliff. 
  Near 
  Branscombe 
  and 
  at 
  Weston 
  

   Mouth 
  the 
  broken 
  shells 
  occur 
  without 
  the 
  pebbles. 
  

  

  The 
  White-Cliff 
  section 
  of 
  this 
  portion 
  of 
  the 
  series 
  gives, 
  in 
  

  

  descending 
  order 
  : 
  — 
  

  

  (a) 
  Argillaceous 
  sand 
  1 
  foot. 
  

  

  (6) 
  Dark, 
  greyish, 
  sandy 
  clay, 
  witb 
  pyrites 
  H 
  ,> 
  

  

  (c) 
  Greenish 
  grey 
  sand, 
  crowded 
  with 
  sandstone-pebble3 
  

  

  and 
  broken 
  shells 
  2 
  feet 
  t. 
  

  

  (d) 
  Sands 
  with 
  irregular 
  concretions 
  20 
  „ 
  

  

  Total 
  25 
  feet. 
  

  

  Fossils 
  : 
  — 
  

  

  Exogyra 
  columba, 
  Lam. 
  

   Janira 
  quadricostata, 
  Sow. 
  

   Pecten 
  orbicularis, 
  Sow. 
  

  

  Pecten 
  elongatus, 
  Lam. 
  

   Vermicularia 
  umbonata, 
  Sow. 
  

  

  Bed 
  5. 
  — 
  Light-coloured 
  sand, 
  with 
  chert 
  in 
  nodules 
  or 
  layers, 
  

   usually 
  more 
  or 
  less 
  tabular. 
  

  

  Thickness 
  variable 
  : 
  25 
  ft. 
  at 
  White 
  Cliff, 
  20 
  ft. 
  at 
  Beer 
  Head, 
  

   20 
  ft. 
  at 
  Branscombe, 
  8 
  ft. 
  at 
  Weston 
  Mouth, 
  7 
  ft. 
  at 
  Dunscombe. 
  

  

  * 
  Trans. 
  Geol. 
  Soc. 
  ser. 
  2. 
  vol. 
  ii. 
  p. 
  114. 
  

  

  t 
  This 
  shingle-bed 
  has 
  been 
  thought 
  by 
  some 
  geologists 
  to 
  mark 
  the 
  upper 
  

   limit 
  of 
  the 
  Gault. 
  

  

  Q.J. 
  G. 
  S. 
  No. 
  119. 
  2i> 
  

  

  