﻿374 
  C. 
  J. 
  A. 
  MEYER 
  ON 
  THE 
  CRETACEOUS 
  ROCKS 
  OF 
  

  

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

   costata, 
  Sow. 
  

  

  The 
  diminution 
  in 
  the 
  thickness 
  of 
  these 
  strata 
  to 
  the 
  westward 
  

   is 
  so 
  considerable 
  that 
  I 
  have 
  thought 
  it 
  advisable 
  to 
  give 
  the 
  

   sections. 
  They 
  are, 
  in 
  descending 
  order, 
  as 
  follows 
  : 
  — 
  

  

  ft. 
  in. 
  

  

  i 
  Sand, 
  with 
  chert 
  in 
  layers 
  12 
  

   Bed 
  of 
  sandstone-pebbles, 
  with 
  broken 
  shells... 
  3 
  6 
  

   Sand, 
  with 
  chert 
  7 
  

  

  ISand, 
  with 
  chert 
  in 
  layers 
  6 
  

   Broken-shell 
  bed 
  1 
  

   Sand, 
  with 
  chert 
  11 
  

  

  (Sand 
  and 
  chert 
  (shattered) 
  6 
  

   Broken 
  shells 
  8 
  

   Chert 
  : 
  an 
  almost 
  continuous 
  layer 
  1 
  

  

  Dunscombe 
  Chert 
  in 
  sand 
  (shattered) 
  7 
  

  

  At 
  Axmouth 
  the 
  chert 
  and 
  sand 
  about 
  it 
  is 
  crowded 
  with 
  sponge- 
  

   spicules. 
  

  

  Bed 
  6. 
  — 
  Light-coloured 
  sand 
  (in 
  places 
  almost 
  white) 
  passing 
  

   into 
  sandstone. 
  

  

  Thickness 
  variable 
  : 
  1 
  ft. 
  at 
  "White 
  Cliff, 
  2 
  ft. 
  6 
  in. 
  at 
  Beer 
  

   Head, 
  1 
  ft. 
  at 
  Branscombe, 
  6 
  in. 
  at 
  Weston. 
  

  

  Fossil 
  — 
  Exogyra 
  digitata, 
  Sow. 
  

  

  Bed 
  7. 
  — 
  Sandstone-pebbles, 
  with 
  fragments 
  of 
  large 
  Ostrece. 
  

   Thickness 
  ft. 
  at 
  White 
  Cliff, 
  2 
  ft. 
  at 
  Beer 
  Head, 
  1 
  ft. 
  at 
  Brans- 
  

   combe, 
  (?) 
  at 
  Weston. 
  

  

  Bed 
  8. 
  — 
  Buff-coloured-sand 
  beds, 
  irregular 
  in 
  structure, 
  with 
  

   zones 
  of 
  sandstone 
  pebbles. 
  

  

  Thickness 
  variable 
  : 
  5 
  ft. 
  at 
  White 
  Cliff, 
  10 
  ft. 
  at 
  Beer 
  Head, 
  (?) 
  

   at 
  Branscombe, 
  5 
  ft. 
  at 
  Weston 
  Mouth, 
  2 
  ft. 
  at 
  Dunscombe. 
  

  

  Characteristic 
  fossils 
  — 
  Exogyra 
  digitata, 
  Sow., 
  and 
  Orbitolina 
  

   concava, 
  Lam. 
  

  

  Fossils 
  : 
  — 
  

  

  Orbitolina 
  concava, 
  Lam 
  Axmouth. 
  Weston. 
  Beer 
  Head. 
  

  

  Branscombe. 
  

  

  Exogyra 
  digitata, 
  Sow 
  Axmouth. 
  Weston. 
  Beer 
  Head. 
  

  

  Bhynchonetla 
  Schloenbachi, 
  Dav 
  Weston. 
  

  

  Spines 
  of 
  Cidaris 
  Dunscombe. 
  

  

  Bed 
  9. 
  — 
  Buff-coloured 
  saccharine-looking 
  sandstone, 
  with 
  fine 
  

   green 
  grains. 
  Includes 
  layers 
  of 
  quartzose 
  grit. 
  

  

  Thickness 
  variable 
  : 
  5 
  ft. 
  at 
  White 
  Cliff, 
  20 
  ft. 
  at 
  Beer 
  Head, 
  

   15 
  ft. 
  at 
  Branscombe, 
  8 
  ft. 
  at 
  Weston, 
  4 
  ft. 
  at 
  Dunscombe. 
  

  

  Fossils 
  : 
  — 
  

  

  Bhynchonella 
  Schlcenbachi, 
  Lav. 
  I 
  Spines 
  of 
  Cidaris. 
  

  

  Ditto 
  (fragments). 
  j 
  Small 
  fish-teeth. 
  

  

  Bed 
  10. 
  — 
  Bubbly, 
  yellowish, 
  quartzose 
  sands, 
  in 
  chalky 
  paste. 
  

   Thickness 
  variable 
  : 
  6 
  ft. 
  at 
  White 
  Cliff, 
  15 
  ft. 
  at 
  Beer 
  Head, 
  

   10 
  ft. 
  at 
  Branscombe, 
  5 
  ft. 
  at 
  Weston 
  Mouth, 
  4 
  ft. 
  at 
  Dunscombe. 
  

  

  