﻿682 
  SEAKLES 
  V. 
  WOOD 
  ON 
  THE 
  NEWER 
  

  

  650 
  feet 
  ; 
  and 
  above 
  this 
  the 
  gravel 
  is 
  in 
  section 
  for 
  a 
  depth 
  of 
  more 
  

   than 
  20 
  feet 
  in 
  places. 
  Thus 
  the 
  highest 
  point 
  to 
  which 
  the 
  New- 
  

   Forest 
  gravel 
  reaches, 
  and 
  which 
  is 
  shown 
  in 
  figs. 
  V. 
  and 
  XLII. 
  as 
  

   419 
  feet, 
  is 
  much 
  below 
  that 
  of 
  maximum 
  submergence 
  in 
  Hampshire, 
  

   so 
  that 
  the 
  gravel 
  at 
  Bramshaw 
  telegraph, 
  shown 
  as 
  6' 
  in 
  those 
  figures, 
  

   could 
  only 
  have 
  emerged 
  about 
  the 
  time 
  when 
  the 
  ice 
  of 
  the 
  Chalky- 
  

   Clay 
  reached 
  its 
  greatest 
  extension 
  in 
  East 
  Anglia. 
  Professor 
  Prestwich 
  

   also 
  describes 
  a 
  bed 
  of 
  gravel 
  mixed 
  with 
  sandy 
  clay 
  on 
  the 
  highest 
  

   points 
  of 
  the 
  Chalk 
  Down, 
  near 
  Weymouth, 
  which 
  he 
  says 
  ranges 
  up 
  

   to 
  730 
  feet 
  ; 
  and 
  this, 
  from 
  his 
  description*, 
  seems 
  to 
  correspond 
  with 
  

   the 
  Meadsted 
  bed 
  in 
  the 
  time 
  and 
  mode 
  of 
  its 
  origin 
  ; 
  so 
  that 
  the 
  evi- 
  

   dences 
  of 
  the 
  maximum 
  submergence 
  seem 
  in 
  Hampshire 
  and 
  Dor- 
  

   setshire 
  to 
  differ 
  but 
  little 
  from 
  those 
  in 
  the 
  Cotteswold 
  region. 
  

  

  In 
  Map 
  4f 
  (in 
  Plate 
  XXYI.) 
  I 
  have 
  represented 
  what 
  appears 
  to 
  

   me 
  to 
  have 
  been 
  the 
  condition 
  of 
  England 
  north 
  of 
  the 
  line 
  of 
  the 
  

   Thames 
  at 
  the 
  culmination 
  of 
  the 
  great 
  depression 
  of 
  Stage 
  II., 
  

   according 
  to 
  the 
  evidences 
  traced 
  in 
  the 
  first 
  part 
  of 
  this 
  memoir, 
  

   when, 
  from 
  the 
  whole 
  of 
  England 
  having 
  become 
  submerged 
  and 
  

   the 
  inclination 
  changed, 
  the 
  ice, 
  which 
  at 
  the 
  beginning 
  of 
  that 
  

   stage, 
  and 
  when 
  the 
  sea 
  was 
  on 
  the 
  east 
  side 
  of 
  England 
  only, 
  

   had 
  (by 
  way 
  of 
  the 
  Humber 
  Valley 
  nearly, 
  and 
  from 
  a 
  more 
  

   northerly 
  direction 
  quite) 
  reached 
  Norfolk, 
  had 
  now 
  retreated 
  to 
  the 
  

   west 
  of 
  the 
  Chalk 
  Wold, 
  preliminary 
  to 
  its 
  advance 
  as 
  emergence 
  

   began 
  in 
  the 
  different 
  direction 
  induced 
  by 
  the 
  altered 
  inclination 
  ; 
  

   the 
  limit 
  of 
  which 
  advance 
  is 
  shown 
  by 
  the 
  strong 
  line 
  on*Map 
  4, 
  

   which 
  marks 
  the 
  limit 
  of 
  the 
  Chalky 
  Clay, 
  the 
  space 
  within 
  this 
  

   line 
  being 
  covered 
  with 
  a 
  more 
  open 
  tint 
  than 
  is 
  the 
  rest 
  of 
  the 
  

   area 
  occupied 
  by 
  sea 
  at 
  the 
  culmination 
  of 
  submergence. 
  A 
  com- 
  

   parison 
  of 
  this 
  map 
  with 
  the 
  representation 
  given 
  in 
  Map 
  1, 
  

   which 
  accompanies 
  the 
  first 
  part 
  of 
  this 
  memoir, 
  and 
  in 
  which 
  

   the 
  Chalky 
  Clay 
  itself 
  is 
  shown, 
  will 
  indicate 
  the 
  evidence 
  on 
  which 
  

   this 
  delineation 
  of 
  the 
  limit 
  of 
  the 
  ice 
  of 
  the 
  Chalky 
  Clay 
  rests 
  ; 
  

   while 
  Map 
  2, 
  which 
  also 
  accompanies 
  that 
  part 
  of 
  the 
  memoir 
  (and 
  

   is 
  continued 
  southwards 
  in 
  the 
  plate 
  to 
  the 
  present 
  part), 
  shows 
  the 
  

   change 
  in 
  land 
  and 
  water 
  between 
  this 
  culmination 
  of 
  the 
  sub- 
  

   mergence 
  and 
  the 
  time 
  when, 
  towards 
  the 
  close 
  of 
  this 
  advance, 
  

   about 
  250 
  feet 
  of 
  emergence 
  had 
  taken 
  place. 
  

  

  * 
  Quart. 
  Journ.'Geol. 
  Soc. 
  vol. 
  xxxi. 
  p. 
  41. 
  The 
  bed 
  is 
  shown 
  in 
  Prof. 
  Prest- 
  

   wich' 
  s 
  plate 
  by 
  black 
  tint, 
  but 
  the 
  distinguishing 
  letter 
  of 
  it 
  is 
  omitted. 
  Its 
  

   position 
  on 
  the 
  Chalk 
  escarpment 
  in 
  his 
  fig. 
  2 
  should 
  be 
  collated 
  with 
  that 
  of 
  

   gravel 
  U 
  in 
  my 
  figs. 
  II. 
  to 
  V. 
  

  

  t 
  Constraint 
  of 
  space 
  has 
  obliged 
  me 
  to 
  confine 
  this 
  map 
  to 
  the 
  north 
  of 
  the 
  

   Thames 
  and 
  Bristol 
  Channel, 
  but 
  the 
  rest 
  of 
  England 
  to 
  the 
  south 
  of 
  it 
  was, 
  

   with 
  the 
  exception 
  of 
  the 
  higher 
  eminences, 
  all 
  submerged. 
  The 
  chief 
  of 
  these 
  

   eminences 
  were 
  : 
  — 
  Dartmoor, 
  Exmoor, 
  the 
  highest 
  parts 
  of 
  the 
  Chalk 
  of 
  Wilts, 
  

   Surrey, 
  Kent, 
  and 
  Sussex, 
  St. 
  Catherine's 
  Down 
  in 
  the 
  Isle 
  of 
  Wight, 
  Leith 
  

   Hill 
  and 
  Mine 
  Head 
  in 
  the 
  Weald, 
  and 
  the 
  highest 
  ridges 
  of 
  the 
  Hastings 
  

   beds 
  in 
  Sussex 
  — 
  all 
  of 
  which 
  were 
  islands, 
  and 
  of 
  which 
  Dartmoor 
  may, 
  from 
  

   its 
  height, 
  have 
  been 
  enveloped 
  in 
  land-ice. 
  The 
  condition 
  to 
  which 
  about 
  250 
  

   feet 
  of 
  emergence 
  brought 
  this 
  part 
  of 
  the 
  submerged 
  country 
  is 
  shown 
  in 
  the 
  

   continuation 
  of 
  Map 
  2, 
  in 
  which 
  the 
  shaded 
  parts 
  are, 
  at 
  the 
  western 
  extremity 
  

   those 
  400 
  feet 
  and 
  upwards 
  above 
  O. 
  D., 
  and 
  at 
  the 
  eastern 
  those 
  200 
  and 
  

   upwards, 
  with 
  the 
  intervening 
  area 
  in 
  proportion. 
  

  

  