﻿284 
  

  

  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  removed 
  from 
  the 
  rock 
  readily 
  falls 
  apart, 
  so 
  that 
  even 
  the 
  beds 
  of 
  

   fine 
  sand 
  and 
  soft 
  marl 
  yield 
  less 
  to 
  the 
  denuding 
  agents 
  than 
  does 
  

   this 
  bed. 
  

  

  When 
  first 
  the 
  bed 
  appears 
  at 
  the 
  beach 
  it 
  is 
  overlain 
  by 
  one 
  of 
  

   fine 
  red 
  sand, 
  which 
  is 
  about 
  seventy 
  feet 
  thick 
  and 
  contains 
  no 
  

  

  Fig. 
  2. 
  — 
  View 
  of 
  the 
  Cliff, 
  looking 
  Westward. 
  

  

  Bed 
  

   marl. 
  

  

  pebbles 
  ; 
  but 
  a 
  bed 
  immediately 
  above 
  this 
  has 
  here 
  and 
  there 
  a 
  

   pebble, 
  The 
  exposure 
  of 
  the 
  pebble-bed 
  itself, 
  from 
  where 
  it 
  is 
  first 
  

  

  Fig. 
  3. 
  — 
  Front 
  View 
  of 
  the 
  Cliff, 
  showing 
  the 
  Pebble-bed 
  as 
  it 
  first 
  

  

  rises 
  from 
  the 
  beach. 
  

  

  • 
  if 
  

  

  Bed 
  sand. 
  

  

  Pebble-bed. 
  = 
  

  

  Beach. 
  

  

  seen 
  to 
  begin 
  eastward, 
  to 
  the 
  point 
  westward 
  where 
  it 
  rises 
  above 
  

   the 
  beach, 
  is 
  near 
  half 
  a 
  mile 
  ; 
  and 
  here 
  the 
  underlying 
  bed 
  in 
  

   contiguity 
  with 
  it 
  is 
  shown 
  to 
  be 
  red 
  marl. 
  

  

  Going 
  westward, 
  again, 
  we 
  find 
  about 
  a 
  quarter 
  of 
  a 
  mile 
  further 
  

   on 
  that 
  the 
  red 
  sand-bed 
  lying 
  above 
  the 
  pebble-bed 
  thins 
  out, 
  and 
  

   about 
  half 
  a 
  mile 
  further 
  westward 
  still 
  the 
  pebble-bed 
  itself 
  dis- 
  

   appears, 
  and 
  the 
  whole 
  of 
  the 
  cliff 
  becomes 
  red 
  marl. 
  

  

  This 
  bed 
  of 
  red 
  marl 
  extends 
  as 
  far 
  west 
  as 
  Littleham 
  Bay, 
  about 
  

   a 
  mile 
  beyond 
  the 
  point 
  where 
  the 
  pebble-bed 
  thins 
  out 
  ; 
  and 
  here 
  

   it 
  abuts 
  against 
  a 
  conglomerate 
  containing 
  pebbles 
  of 
  Carboniferous 
  

   Grit, 
  of 
  small 
  size 
  and 
  very 
  angular. 
  This 
  abrupt 
  junction 
  of 
  the 
  

  

  