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  THE 
  BAJOCIAN 
  OP 
  THE 
  CLEEYE 
  HILL 
  PLA.TEATT. 
  [Dec. 
  1 
  89 
  7. 
  

  

  VII. 
  The 
  Bajocian 
  Denudation. 
  

  

  The 
  presence 
  of 
  the 
  Phillipsiana- 
  and 
  Bourguetia-loe&s 
  at 
  the 
  

   Cleeve 
  Hill 
  plateau 
  supplies 
  certain 
  further 
  details 
  concerning 
  the 
  

   Bajocian 
  denudation 
  : 
  namely, 
  that 
  at 
  Cleeve 
  Hill 
  there 
  was 
  spared 
  

   an 
  additional 
  amount 
  of 
  about 
  45 
  feet 
  of 
  strata 
  more 
  than 
  at 
  

   Leckhampton. 
  That 
  hill 
  again 
  has 
  about 
  34 
  feet 
  more 
  than 
  at 
  

   Cranham 
  (Buckholt) 
  Wood, 
  beyond 
  Birdlip. 
  Therefore, 
  in 
  com- 
  

   parison 
  with 
  that 
  locality, 
  Cleeve 
  Hill 
  shows 
  about 
  79 
  more 
  feet 
  

   of 
  rock 
  beneath 
  the 
  Upper 
  Trigonia-grit 
  ; 
  and, 
  as 
  the 
  distance 
  is 
  

   about 
  9 
  miles, 
  the 
  average 
  fall, 
  or 
  amount 
  removed, 
  is 
  about 
  9 
  feet 
  

   per 
  mile. 
  This 
  amount 
  of 
  fall 
  would 
  be 
  so 
  small 
  a 
  departure 
  from 
  

   the 
  horizontal 
  that 
  it 
  can 
  be 
  easily 
  understood 
  how 
  the 
  Upper 
  

   Trigonia-grit 
  was 
  laid 
  down 
  upon 
  different 
  rocks 
  with 
  a 
  false 
  

   appearance 
  of 
  conformity 
  to 
  each 
  of 
  them. 
  A 
  view 
  of 
  the 
  Bajocian 
  

   denudation, 
  and 
  the 
  position 
  of 
  the 
  Upper 
  Trigonia-giit 
  relatively 
  

   to 
  underlying 
  beds 
  from 
  beyond 
  Birdlip 
  to 
  Cleeve 
  Hill, 
  is 
  shown 
  

   in 
  Diagr. 
  IV, 
  facing 
  this 
  page. 
  In 
  this 
  diagram 
  the 
  almost 
  regular 
  

   line 
  of 
  the 
  Bajocian 
  denudation 
  should 
  be 
  noted. 
  1 
  

  

  With 
  regard 
  to 
  the 
  bed 
  which 
  underlies 
  the 
  Upper 
  Trigonia-grit^ 
  

   it 
  should 
  be 
  remarked 
  that 
  whether 
  freestone, 
  sandstone, 
  or 
  other- 
  

   wise, 
  it 
  is 
  always 
  considerably 
  bored, 
  that 
  the 
  shells 
  which 
  the 
  bed 
  

   contains 
  are 
  bored, 
  that 
  the 
  top 
  of 
  the 
  bed 
  is 
  more 
  or 
  less 
  planed 
  

   off, 
  and 
  that 
  oysters 
  are 
  frequently 
  found 
  forming 
  a 
  thin 
  layer 
  on 
  

   this 
  planed 
  top. 
  

  

  The 
  fact 
  that 
  at 
  Cleeve 
  Hill 
  as 
  at 
  Dundry, 
  2 
  and 
  at 
  Sandford 
  

   Lane 
  near 
  Sherborne, 
  the 
  denudation 
  occurs 
  on 
  the 
  top 
  of 
  beds 
  

   which 
  can 
  be 
  dated 
  as 
  Sauzei 
  hemera 
  is 
  a 
  matter 
  of 
  some 
  interest 
  

   in 
  connexion 
  with 
  the 
  treatise 
  which 
  Dr. 
  M. 
  Vacek 
  wrote 
  to 
  show 
  

   that 
  the 
  greatest 
  stratigraphical 
  non-sequence 
  was 
  between 
  strata 
  of 
  

   the 
  Murcliisonce- 
  and 
  Sow 
  erbyi-zones, 
  3 
  and 
  that 
  therefore 
  that 
  was 
  the 
  

   proper 
  place 
  for 
  a 
  division 
  between 
  Lias 
  and 
  Oolite. 
  These 
  localities 
  

   do 
  not 
  accord 
  therewith, 
  and 
  still 
  less 
  does 
  Oborne 
  in 
  Dorset, 
  where 
  

   a 
  non-sequence 
  is 
  not 
  found. 
  But 
  the 
  fact 
  is 
  that 
  no 
  stratigraphical 
  

   details 
  can 
  decide 
  a 
  matter 
  of 
  geological 
  division 
  — 
  such 
  phenomena 
  

   are 
  local, 
  and 
  they 
  are 
  not 
  contemporaneous. 
  The 
  only 
  method 
  

   by 
  which 
  an 
  uniform 
  geological 
  system 
  of 
  division, 
  universally 
  

   applicable, 
  can 
  be 
  accomplished 
  is 
  by 
  making 
  it 
  dependent 
  on 
  

   palaeontological, 
  and 
  independent 
  of 
  stratigraphical 
  matters. 
  

  

  1 
  At 
  Leckhampton 
  Hill 
  the 
  Upper 
  Freestone 
  has 
  a 
  planed-off 
  top 
  surface, 
  

   is 
  somewhat 
  bored, 
  and 
  has 
  pitlike 
  excavations 
  which 
  are 
  filled 
  with 
  Snowshill 
  

   Clay. 
  There 
  are 
  no 
  Harford 
  Sands. 
  In 
  the 
  Stroud 
  area 
  the 
  Upper 
  Freestone 
  

   is 
  much 
  bored, 
  so 
  that 
  from 
  Leckhampton 
  southward 
  there 
  was 
  an 
  Aalenian 
  

   denudation 
  of 
  the 
  Upper 
  Freestone. 
  See 
  also 
  ' 
  Mid-Cotteswolds/ 
  p. 
  430, 
  

   table 
  vi. 
  

  

  2 
  < 
  Dundry 
  Hill,' 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  lii. 
  (1896) 
  p. 
  704, 
  table 
  vi., 
  & 
  

   p. 
  711. 
  

  

  3 
  ' 
  Ueber 
  die 
  Fauna 
  der 
  Oolithe 
  von 
  Cap 
  St. 
  Vigilio, 
  verbunden 
  mit 
  einer 
  

   Studie 
  iiber 
  die 
  obere 
  Liasgrenze, 
  pt. 
  ii.' 
  Abh. 
  k.-k. 
  geol. 
  Eeichsanst., 
  vol. 
  xii. 
  

   (1886) 
  pp. 
  120-209. 
  

  

  