﻿402 
  

  

  W. 
  WHITAKER 
  ON 
  THE 
  OCCURBENCE 
  OF 
  

  

  further 
  and 
  better 
  evidence. 
  The 
  sands 
  above 
  referred 
  to 
  must 
  in 
  

   great 
  part 
  belong 
  to 
  the 
  Reading 
  Beds, 
  as 
  there 
  is 
  no 
  thickness 
  of 
  

   even 
  20 
  feet 
  of 
  Thanet 
  Sand 
  to 
  be 
  seen 
  in 
  North 
  Essex 
  ; 
  but 
  I 
  think 
  

   it 
  can 
  be 
  shown 
  from 
  an 
  examination 
  of 
  the 
  pits 
  at 
  Sudbury 
  that 
  

   there 
  is 
  really 
  an 
  outcrop 
  of 
  Thanet 
  Sand 
  — 
  though 
  I 
  believe 
  it 
  does 
  

   not 
  reach 
  so 
  far 
  westward 
  as 
  Stortford, 
  unless 
  the 
  bed 
  of 
  clayey 
  

   greensand 
  that 
  comes 
  on 
  above 
  the 
  Chalk 
  there 
  should 
  belong 
  to 
  

   this 
  division 
  of 
  the 
  Lower 
  London 
  Tertiaries. 
  

  

  Details 
  of 
  the 
  various 
  sections 
  will 
  be 
  given 
  in 
  the 
  proper 
  place 
  

  

  (a 
  Geological-Survey 
  Memoir) 
  ; 
  but 
  it 
  has 
  been 
  thought 
  better 
  to 
  lay 
  

  

  .a 
  statement 
  of 
  the 
  facts 
  (trifling 
  though 
  they 
  be) 
  before 
  the 
  Society 
  

  

  than 
  to 
  keep 
  them 
  hidden 
  away 
  for 
  perhaps 
  some 
  years. 
  It 
  will 
  be 
  

  

  Section 
  of 
  the 
  Lower 
  Tertiary 
  Beds 
  at 
  the 
  Great 
  

  

  Chalk-pit, 
  Balingdon. 
  1873. 
  

  

  (Scale 
  8 
  feet 
  to 
  an 
  inch.) 
  

  

  feet. 
  

  

  a. 
  LondonClay, 
  brown 
  and 
  dark 
  grey, 
  with 
  "race." 
  

   No 
  basement-bed. 
  

  

  Reading 
  

  

  Blackish, 
  rather 
  sandy 
  clay, 
  and 
  

   clayey 
  sand 
  3 
  

  

  Thanet 
  

   Sand. 
  

  

  | 
  c. 
  Pale 
  greenish-grey, 
  red-mottled, 
  bedded 
  

   ^ 
  sandy 
  clay, 
  the 
  upper 
  part 
  redder. 
  . 
  . 
  6 
  

  

  ( 
  d. 
  Buff 
  and 
  pale 
  grey, 
  fine, 
  soft, 
  and 
  

  

  I 
  somewhat 
  clayey 
  sand, 
  bedded 
  and 
  

   firm. 
  The 
  bottom 
  3 
  feet 
  or 
  so 
  (d 
  1 
  ) 
  

   pinkish, 
  that 
  tint 
  being 
  stronger 
  at 
  

   the 
  lowest 
  half 
  foot 
  (d") 
  about 
  12 
  

  

  Clayey 
  greensand, 
  very 
  bright-co- 
  

   loured 
  at 
  top, 
  with 
  a 
  few 
  green- 
  

   coated 
  flints 
  at 
  the 
  bottom, 
  and 
  here 
  

   and 
  there 
  some 
  higher 
  up. 
  This 
  

   bed 
  is 
  noticed 
  by 
  W. 
  Smith, 
  in 
  

   his 
  ' 
  Geological 
  Map 
  of 
  Essex 
  ' 
  

   (1820), 
  as 
  " 
  Greensand, 
  called 
  

   Devil's 
  Dung," 
  a 
  name 
  still 
  kept 
  in 
  

   ^ 
  the 
  locality 
  about 
  2 
  

  

  Chalk. 
  A 
  thin 
  bed 
  of 
  tabular 
  flint 
  (of 
  alter- 
  

   nate 
  black 
  and 
  white 
  layers) 
  at 
  top 
  (x). 
  

   Other 
  flints 
  rare 
  (?=the 
  " 
  Margate 
  Chalk" 
  of 
  

   Kent). 
  The 
  top 
  flint 
  bed 
  is 
  noticed 
  by 
  W. 
  

   Smith, 
  in 
  his 
  ' 
  Geological 
  Map 
  of 
  Suffolk 
  ' 
  

   (1819) 
  thus 
  :< 
  — 
  " 
  Chalk, 
  covered 
  with 
  a 
  Floor 
  

   of 
  Stratified 
  Flint." 
  

  

  enough 
  here 
  to 
  notice 
  the 
  one 
  great 
  section 
  where 
  all 
  the 
  beds 
  from 
  

   the 
  London 
  Clay 
  to 
  the 
  Chalk 
  may 
  be 
  seen. 
  This 
  is 
  in 
  a 
  pit 
  on 
  the 
  

   right 
  slope 
  of 
  the 
  valley 
  of 
  the 
  Stour, 
  just 
  south 
  of 
  Ealingdon, 
  the 
  

   Essex 
  suburb 
  of 
  Sudbury, 
  which 
  is 
  worked 
  down 
  to 
  the 
  level 
  of 
  the 
  

  

  