﻿Vol. 
  53.] 
  THE 
  BAJOCIAN 
  OF 
  THE 
  CLEEVE 
  HILL 
  PLATEAU. 
  

  

  615 
  

  

  Therefore 
  the 
  sequence 
  of 
  Eajocian 
  deposits 
  is 
  still 
  incomplete 
  in 
  

   the 
  Cottes 
  wolds. 
  

  

  To 
  show 
  how 
  partial 
  is 
  the 
  preservation 
  of 
  the 
  Bourguetia- 
  and 
  

   Phillij^siana-be&s 
  it 
  may 
  be 
  noticed 
  that 
  at 
  Farmcott 
  "Wood, 
  on 
  the 
  

   top 
  of 
  Sndeley 
  Hill, 
  4 
  miles 
  east 
  of 
  the 
  Rolling 
  Bank, 
  these 
  beds 
  

   and 
  the 
  Witchellia-grit 
  have 
  disappeared, 
  and 
  the 
  Upper 
  Trigonia- 
  

   grit 
  rests 
  directly 
  upon 
  Notgrove 
  Freestone, 
  whereof 
  15 
  feet 
  is 
  

   shown. 
  In 
  a 
  southward 
  direction 
  the 
  same 
  superposition 
  is 
  found 
  

   in 
  5 
  \ 
  miles 
  — 
  at 
  Leckhampton 
  1 
  and 
  at 
  Eough 
  Hill 
  Bank. 
  2 
  What 
  

   was 
  effected 
  by 
  Bajocian 
  denudation 
  to 
  the 
  north 
  will 
  never 
  be 
  

   known, 
  because 
  all 
  the 
  strata 
  have 
  been 
  removed 
  in 
  the 
  excavation 
  

   of 
  the 
  Severn 
  Valley. 
  What 
  may 
  be 
  found 
  to 
  the 
  north-east 
  has 
  

   yet 
  to 
  be 
  learnt 
  ; 
  but 
  a 
  preliminary 
  survey 
  gives 
  little 
  hope 
  of 
  any 
  

   strata 
  being 
  found 
  to 
  fill 
  the 
  gap, 
  or 
  even 
  of 
  any 
  other 
  occurrence 
  

   of 
  beds 
  between 
  the 
  Notgrove 
  Freestone 
  and 
  the 
  Upper 
  Trigonia- 
  

   grit. 
  

  

  The 
  relation 
  of 
  the 
  Bourguetia- 
  and 
  Phillipsiana-be&s 
  to 
  the 
  

   Witchellia-giit, 
  and 
  thence 
  to 
  the 
  Gryphite-grit, 
  was 
  first 
  learnt 
  

   in 
  the 
  quarries 
  east 
  of 
  the 
  Rolling 
  Bank. 
  The 
  details 
  which 
  

   they 
  afford 
  are 
  shown 
  in 
  Diagr. 
  I, 
  drawn 
  to 
  a 
  true 
  scale. 
  The 
  

   shaded 
  portions 
  show 
  the 
  beds 
  as 
  they 
  are 
  exposed 
  in 
  the 
  quarries, 
  

   and 
  the 
  continuing 
  lines 
  indicate 
  the 
  surmises 
  which 
  are 
  to 
  be 
  

   made 
  therefrom. 
  

  

  The 
  recent 
  extension 
  of 
  the 
  Rolling 
  Bank 
  quarry 
  has 
  confirmed 
  

   the 
  sequence 
  illustrated, 
  but 
  it 
  has 
  not 
  enabled 
  any 
  better 
  measure- 
  

   ments 
  of 
  actual 
  thickness 
  to 
  be 
  made 
  than 
  those 
  which 
  are 
  possible 
  

   from 
  this 
  diagram. 
  

  

  IY. 
  The 
  Sequence 
  oe 
  Cottes 
  wold 
  ' 
  Infeeiok 
  Oolite 
  ' 
  Rocks. 
  

  

  A 
  sequential 
  list 
  of 
  certain 
  Cotteswold 
  deposits 
  is 
  given 
  in 
  the 
  

   paper 
  on 
  Dundry 
  Hill, 
  3 
  together 
  with 
  the 
  dates 
  assignable 
  to 
  each 
  

   according 
  to 
  a 
  chronological 
  system. 
  There 
  have 
  now 
  to 
  be 
  recorded 
  

   certain 
  additions 
  and 
  emendations, 
  so 
  that 
  the 
  following 
  sequence 
  

   is 
  presented 
  : 
  — 
  

  

  Chronological 
  Terms. 
  

  

  Stratigraphical 
  Terms. 
  

  

  Bathonian. 
  

  

  Garantiance. 
  

   ^ 
  (Non-sequence.) 
  

  

  Upper 
  Trigonia-grit. 
  

  

  

  Sauzei. 
  

  

  Phillipsiana-be&s. 
  

   Bourguetia-be&s. 
  

  

  Bajocian. 
  - 
  

  

  Witchellice. 
  

  

  Witchellia-becis. 
  

  

  

  Notgrove 
  Freestone. 
  

  

  

  SonninicB. 
  

  

  Gryphite-grit. 
  

   Buckmani-grit. 
  

  

  

  ^-Discitce. 
  

  

  Lower 
  Trigonia-grit. 
  

  

  

  " 
  Concavi. 
  

  

  Snowshill 
  Clay. 
  

  

  Aalenian. 
  < 
  

  

  

  Harford 
  Sands. 
  

  

  

  Bradfordensis. 
  

  

  Upper 
  Freestone. 
  

  

  1 
  ' 
  Mid-Cotteswolds,' 
  p. 
  410. 
  a 
  Ibid. 
  p. 
  423. 
  

  

  3 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  lii. 
  (1896) 
  p. 
  704, 
  table 
  vi. 
  

  

  