﻿208 
  PEOF. 
  E. 
  HULL 
  ON" 
  A 
  PEOPOSED 
  

  

  South-east 
  of 
  England. 
  — 
  There 
  is 
  probably 
  only 
  one 
  district 
  in 
  the 
  

   British 
  Isles 
  where 
  the 
  marine 
  representatives 
  of 
  the 
  entire 
  series, 
  

   from 
  the 
  Upper 
  Silurian 
  to 
  the 
  Carboniferous, 
  exist 
  in 
  unbroken 
  

   sequence 
  — 
  namely, 
  the 
  tract 
  covered 
  by 
  the 
  Cretaceous 
  and 
  Tertiary 
  

   beds 
  north 
  of 
  London. 
  There, 
  I 
  anticipate, 
  we 
  should 
  find, 
  were 
  the 
  

   newer 
  strata 
  stripped 
  off, 
  a 
  continuous 
  succession 
  from 
  the 
  Wenlock, 
  

   through 
  the 
  Ludlow, 
  the 
  Devono-Silurian, 
  Devonian, 
  and 
  Old 
  Eed 
  Sand- 
  

   stone, 
  to 
  the 
  Lower 
  Carboniferous 
  beds, 
  between 
  Ware, 
  in 
  Hertford- 
  

   shire, 
  and 
  the 
  North 
  Downs 
  of 
  Kent 
  and 
  Surrey. 
  As 
  Mr. 
  Etheridge 
  

   has 
  shown 
  *, 
  the 
  AYenlock 
  beds 
  have 
  been 
  proved 
  in 
  a 
  boring 
  at 
  

   Ware, 
  under 
  the 
  Gault 
  ; 
  and 
  he 
  conjectures 
  that 
  the 
  Ludlow 
  beds 
  

   might 
  be 
  found 
  " 
  under, 
  or 
  a 
  little 
  to 
  the 
  south 
  of 
  Hertford," 
  while 
  the 
  

   Devonian 
  beds 
  have 
  been 
  proved 
  to 
  exist 
  at 
  Turnford 
  and 
  Tottenham 
  

   Court 
  Eoad. 
  Between 
  these 
  places 
  and 
  Hertford 
  we 
  may 
  therefore 
  

   infer 
  that 
  the 
  Devono-Silurian 
  beds 
  lie 
  concealed 
  beneath 
  the 
  Chalk. 
  

   The 
  series 
  here 
  has 
  its 
  parallel 
  in 
  South 
  Wales 
  and 
  the 
  border 
  dis- 
  

   tricts, 
  except 
  that 
  there 
  the 
  Devonian 
  series 
  occurs 
  as 
  an 
  abnormal 
  

   estuarine, 
  instead 
  of 
  as 
  a 
  marine, 
  deposit. 
  

  

  The 
  following 
  Table 
  gives 
  the 
  succession 
  of 
  the 
  geological 
  series 
  

   downwards, 
  which, 
  from 
  its 
  simplicity, 
  will, 
  I 
  trust, 
  commend 
  itself 
  

   to 
  the 
  reader, 
  while 
  it 
  brings 
  the 
  series 
  into 
  direct 
  harmony 
  with 
  

   those 
  of 
  the 
  Continent 
  and 
  America. 
  

  

  Table 
  of 
  Succession 
  of 
  Formations 
  in 
  the 
  British 
  Isles. 
  

  

  Lower 
  Carboni- 
  

   ferous 
  Beds. 
  

  

  Old 
  Eed 
  Sandstone 
  

  

  1. 
  Carboniferous 
  Limestone. 
  

  

  ■> 
  

  

  Lower 
  Carboniferous 
  Shale 
  or 
  Slate 
  (England 
  and 
  

  

  Ireland). 
  

   Coomhola 
  Grits 
  and 
  Slates 
  (Ireland) 
  ; 
  Pilton, 
  .Baggy, 
  

  

  and 
  Marwood 
  beds 
  (Devonshire). 
  

  

  ( 
  1. 
  Kiltorcan 
  beds, 
  with 
  Talceopteris 
  and 
  Anodonta, 
  fish 
  

   (JBothriolcpis, 
  Coccostcus, 
  Glyptolepis, 
  and 
  Asterolepis?) 
  

  

  /TT 
  " 
  -^ 
  j 
  and 
  Crustaceans 
  (Ireland). 
  

  

  (Upper 
  Devonian, 
  <j 
  nifl 
  -p 
  , 
  Sjmflsfnilft 
  \ 
  nA 
  n 
  ' 
  

  

  in 
  part). 
  

  

  Old 
  Eed 
  Sandstone 
  and 
  Conglomerate 
  (Ireland), 
  Pick- 
  

   well-Down. 
  Sandstone 
  (Devon), 
  Yellow 
  Sandstone 
  

   ^ 
  and 
  Conglomerate 
  (Monmouth, 
  Brecon, 
  &c). 
  

  

  (\. 
  Morthoe 
  slates 
  (Devon). 
  ^ 
  Estuarine 
  De- 
  

  

  | 
  2. 
  Ilfracombe 
  and 
  Plymouth 
  limestone 
  | 
  vonian 
  beds 
  of 
  

   Devonian 
  beds. 
  \ 
  group. 
  \ 
  Hereford 
  (so- 
  

  

  | 
  3. 
  Hangman 
  Grits 
  and 
  Slates 
  (Devon). 
  | 
  called 
  Old 
  Eed 
  

   ^4. 
  LyntonShalesandLimestones(Devon).J 
  Sandstone). 
  

  

  ( 
  Eoreland 
  Grits 
  and 
  Slates 
  (Devon) 
  ; 
  Downton 
  Sand- 
  

   -r. 
  „.-, 
  . 
  stone 
  and 
  Passage-beds 
  (Hereford, 
  &c.) 
  ; 
  Glengariff 
  

  

  Uevono-bUiman 
  ^ 
  Gritg 
  and 
  slateg 
  (or 
  p^e^eds) 
  (Ireland) 
  ; 
  and 
  

  

  Lower 
  Old 
  Eed 
  Sandstone 
  (Scotland) 
  ; 
  Systeme 
  Gre- 
  

   y 
  clinnien 
  in 
  part 
  (Belgium). 
  

  

  Upper 
  Silurian 
  It 
  \ 
  Ludlow 
  beds. 
  

  

  beds. 
  

  

  [ 
  Wenlock 
  beds, 
  &c. 
  

  

  * 
  Anniversary 
  Address, 
  p. 
  230 
  {supra 
  cit.). 
  In 
  the 
  4th 
  edit, 
  of 
  the 
  ' 
  Coal- 
  

   fields 
  of 
  Great 
  Britain' 
  (1881), 
  I 
  have 
  given 
  an 
  engraved 
  section 
  to 
  show 
  the 
  

   probable 
  succession 
  of 
  the 
  Palceozoic 
  beds 
  of 
  this 
  part 
  of 
  England 
  beneath 
  the 
  

   overlying 
  Mesozoic 
  and 
  Cainozoic 
  strata. 
  

  

  