﻿Vol. 
  53.] 
  DEPOSITS 
  OE 
  THE 
  CLEEVE 
  HILL 
  PLATEAU. 
  627 
  

  

  eastward 
  from 
  a 
  former 
  westerly 
  extension 
  of 
  the 
  Cotteswolds. 
  

   The 
  700-foot 
  contour-line 
  of 
  the 
  Chelt 
  Valley 
  supports 
  this 
  idea. 
  1 
  

   It 
  may 
  be 
  further 
  surmised 
  that 
  the 
  western 
  escarpment 
  of 
  the 
  

   Cleeve 
  Hill 
  plateau 
  formed 
  one 
  side 
  of 
  a 
  river-valley 
  along 
  which 
  

   this 
  stream 
  flowed. 
  2 
  

  

  All 
  this, 
  of 
  course, 
  was 
  at 
  a 
  period 
  when 
  the 
  Cotteswolds 
  had 
  a 
  

   much 
  greater 
  extension 
  over 
  the 
  valleys 
  of 
  the 
  Severn 
  and 
  the 
  

   Warwickshire 
  Avon. 
  At 
  that 
  time 
  the 
  Thames 
  must 
  have 
  been 
  

   not 
  only 
  a 
  far 
  larger, 
  but 
  a 
  very 
  much 
  longer 
  river 
  than 
  it 
  is 
  now. 
  

  

  XI. 
  Map 
  oe 
  the 
  Cleeve 
  Hill 
  Plateau. 
  

  

  "With 
  this 
  communication 
  is 
  presented 
  a 
  map 
  of 
  the 
  district 
  

   referred 
  to. 
  No 
  attempt 
  has 
  been 
  made 
  to 
  map 
  the 
  limits 
  of 
  the 
  

   various 
  deposits, 
  because, 
  owing 
  to 
  the 
  faults, 
  this 
  must 
  be 
  a 
  work 
  

   of 
  some 
  labour. 
  The 
  map, 
  however, 
  is 
  given 
  as 
  a 
  guide 
  to 
  a 
  dis- 
  

   trict 
  wherein 
  it 
  is 
  difficult 
  to 
  state 
  with 
  exactness 
  the 
  sites 
  of 
  the 
  

   exposures. 
  The 
  beds 
  shown 
  by 
  the 
  different 
  exposures 
  — 
  or 
  at 
  least 
  

   by 
  the 
  principal 
  quarries 
  — 
  are 
  marked 
  upon 
  the 
  map 
  ; 
  and 
  besides 
  

   that, 
  where 
  other 
  evidence 
  of 
  the 
  nature 
  of 
  the 
  substratum 
  has 
  been 
  

   obtained, 
  the 
  name 
  of 
  the 
  deposit 
  has 
  been 
  entered. 
  Some 
  of 
  the 
  

   faults 
  have 
  also 
  been 
  indicated. 
  (See 
  p. 
  628.) 
  

  

  XII. 
  Conclusion 
  and 
  Summaey. 
  

  

  This 
  paper 
  deals 
  with 
  a 
  part 
  of 
  the 
  Northern 
  Cotteswolds, 
  and 
  

   it 
  is 
  hoped 
  to 
  supplement 
  it 
  in 
  the 
  future 
  by 
  some 
  account 
  of 
  the 
  

   remaining 
  portion 
  of 
  that 
  little-known 
  district. 
  The 
  present 
  com- 
  

   munication 
  deals 
  only 
  with 
  some 
  of 
  the 
  rocks 
  exposed 
  at 
  the 
  Cleeve 
  

   Hill 
  plateau 
  3 
  ; 
  but 
  it 
  treats 
  of 
  that 
  portion 
  about 
  which 
  most 
  mis- 
  

   apprehension 
  has 
  occurred, 
  and 
  whose 
  position 
  in 
  the 
  series 
  it 
  has 
  been 
  

   always 
  a 
  very 
  difficult 
  point 
  to 
  determine. 
  The 
  work 
  in 
  the 
  Mid- 
  

   Cotteswolds, 
  and 
  particularly 
  the 
  recognition 
  of 
  the 
  position 
  of 
  the 
  

   Witchellia-grit 
  at 
  Cold 
  Comfort, 
  gave 
  the 
  necessary 
  clue 
  to 
  the 
  

   unravelling 
  of 
  the 
  Cleeve 
  Hill 
  sequence. 
  The 
  interesting 
  point 
  is 
  

   that 
  at 
  Cleeve 
  Hill 
  there 
  should 
  be 
  found 
  so 
  much 
  more 
  rock 
  

   beneath 
  the 
  Upper 
  Trigonia-gxit. 
  There 
  are 
  the 
  Phillipsiana-, 
  

   Bourguetia-, 
  and 
  Witchellia-loeds, 
  of 
  which 
  no 
  trace 
  is 
  found 
  at 
  

   Leckhampton 
  ; 
  and 
  there 
  is 
  a 
  thick 
  deposit 
  of 
  Notgrove 
  Freestone, 
  

   of 
  which 
  Leckhampton 
  shows 
  but 
  the 
  smallest 
  remnant. 
  

  

  1 
  The 
  present 
  streams 
  on 
  the 
  east 
  and 
  south 
  of 
  the 
  Cleeve 
  Hill 
  plateau 
  could 
  

   not 
  have 
  excavated 
  all 
  those 
  valleys, 
  because 
  they 
  rise 
  from 
  200 
  to 
  300 
  feet 
  

   below 
  the 
  top 
  edges 
  thereof. 
  

  

  2 
  The 
  western 
  side 
  of 
  Cleeve 
  Hill 
  would 
  be 
  analogous 
  to 
  the 
  eastern 
  side 
  of 
  

   the 
  Sevenhampton 
  Valley. 
  The 
  latter, 
  supposing 
  the 
  Cleeve 
  Hill 
  plateau 
  to 
  

   be 
  by 
  any 
  means 
  removed, 
  would 
  become 
  the 
  outer 
  Cotteswold 
  escarpment, 
  and 
  

   would 
  be 
  the 
  relic 
  of 
  an 
  old 
  river-valley. 
  

  

  3 
  Much 
  has 
  yet 
  to 
  be 
  learnt 
  about 
  the 
  others, 
  especially 
  concerning 
  the 
  

   Pea-grit 
  series. 
  

  

  2t2 
  

  

  