﻿The 
  Batlioniojn 
  Rocks 
  of 
  the 
  Oxford 
  District. 
  377 
  

  

  Block 
  2. 
  Thickness 
  in 
  feet. 
  

  

  Compact 
  limestones 
  of 
  a 
  ccarser 
  texture 
  ^ 
  

   than 
  those 
  of 
  Block 
  1 
  . 
  1 
  he 
  full 
  thick- 
  

   ness 
  is 
  exposed 
  only 
  in 
  the 
  Ardley 
  | 
  

   Cutting, 
  where 
  it 
  is 
  15 
  feet. 
  The 
  ! 
  

   thickness 
  to 
  the 
  base 
  of 
  the 
  ' 
  Nerincea 
  \ 
  

   Eock 
  ' 
  is 
  about 
  6 
  feet 
  at 
  Ardley 
  and 
  j 
  

   17 
  feet 
  in 
  the 
  Gibraltar 
  Quarry, 
  3 
  miles 
  | 
  

   away 
  to 
  the 
  south-west. 
  J 
  

  

  Block 
  3. 
  

  

  Clays 
  and 
  sandy 
  argillaceous 
  limestones, 
  I 
  l 
  _ 
  1 
  

  

  now 
  exposed 
  only 
  in 
  the 
  Ardley 
  r 
  'a 
  

  

  fintfinor 
  J 
  

  

  FULLONIAN. 
  

  

  Cutting. 
  

  

  Upper 
  Beds. 
  

  

  Compact 
  rock 
  and 
  clay, 
  very 
  fossiliferous. 
  5 
  

  

  Fullers' 
  Earth 
  Rock 
  4 
  

  

  ' 
  Concinna 
  Beds 
  ' 
  4£ 
  

  

  (Position 
  of 
  the 
  Stonesfield 
  Slates.) 
  

  

  Lower 
  Beds. 
  

  

  1 
  Neseran 
  Beds,' 
  consisting 
  of 
  a 
  series 
  of 
  j 
  

  

  semi-estuarine 
  green 
  clays, 
  with 
  one 
  L 
  about 
  16 
  

   band 
  of 
  limestone 
  about 
  the 
  centre. 
  ) 
  

  

  Chipping-Norton 
  Limestone, 
  consisting! 
  , 
  9 
  

  

  of 
  sandy 
  and 
  argillaceous 
  limestones. 
  J 
  

  

  After 
  a 
  general 
  description 
  of 
  the 
  series, 
  the 
  principal 
  points 
  of 
  

   interest 
  in 
  the 
  different 
  sections 
  and 
  their 
  mutual 
  relations 
  are 
  

   described 
  ; 
  and 
  the 
  author 
  points 
  out 
  that, 
  although 
  no 
  definite 
  

   zones 
  can 
  be 
  formulated, 
  the 
  different 
  horizons 
  are 
  readily 
  recog- 
  

   nizable 
  by 
  their 
  assemblage 
  of 
  fossils. 
  

  

  The 
  chemical 
  and 
  microscopic 
  structure 
  of 
  the 
  rocks 
  is 
  dealt 
  with, 
  

   and 
  the 
  conditions 
  of 
  deposition 
  and 
  stratigraphical 
  relationship 
  of 
  

   the 
  different 
  members 
  of 
  the 
  series 
  are 
  discussed. 
  In 
  addition, 
  

   some 
  peculiar 
  structures 
  from 
  the 
  Chipping-Norton 
  Limestone 
  are 
  

   described, 
  and 
  the 
  author 
  adduces 
  his 
  reasons 
  for 
  considering 
  them 
  

   to 
  be 
  annelid-tubes. 
  

  

  A 
  complete 
  list 
  of 
  the 
  fossils 
  is 
  appended, 
  showing 
  the 
  horizons 
  

   and 
  exposures 
  from 
  which 
  they 
  have 
  been 
  obtained 
  ; 
  tables 
  giving 
  

   the 
  correlation 
  between 
  different 
  exposures 
  are 
  also 
  added. 
  

  

  2. 
  ' 
  On 
  the 
  Petrology 
  of 
  the 
  Kalgoorlie 
  Goldfield 
  (Western 
  

   Australia).' 
  By 
  James 
  Allan 
  Thomson, 
  M.A., 
  D.Sc, 
  F.G.S. 
  

  

  The 
  district 
  described 
  comprises 
  an 
  area 
  about 
  4 
  miles 
  long 
  by 
  

   1 
  mile 
  in 
  breadth. 
  Towards 
  its 
  southern 
  end 
  the 
  auriferous 
  lodes 
  

   are 
  very 
  rich 
  (The 
  Golden 
  Mile), 
  but 
  in 
  the 
  northern 
  end 
  they 
  are 
  

   not 
  so 
  productive. 
  The 
  information 
  as 
  to 
  the 
  geological 
  structure 
  

   has 
  mostly 
  been 
  obtained 
  from 
  mining 
  plans, 
  shafts, 
  and 
  workings. 
  

   The 
  rocks 
  have 
  a 
  general 
  north 
  -north- 
  westerly 
  strike, 
  and 
  most 
  of 
  

   the 
  junctions 
  are 
  faulted. 
  In 
  ' 
  The 
  Golden 
  Mile' 
  the 
  central 
  feature 
  

   is 
  a 
  boss 
  or 
  broad 
  dyke 
  of 
  quartz-dolerite, 
  which 
  forms 
  a 
  prominent 
  

   ridge 
  flanked 
  by 
  amphibolites 
  and 
  greenstones. 
  The 
  quartz-dolerite 
  

   is 
  cut 
  by 
  dykes 
  of 
  albite-porphyry, 
  and 
  west 
  of 
  the 
  main 
  ridge 
  

   similar 
  porphyries 
  are 
  frequent. 
  Gold 
  is 
  found 
  principally 
  in 
  shear- 
  

  

  PML 
  Mag. 
  S. 
  6. 
  Vol. 
  26. 
  No. 
  152. 
  Aug. 
  1913, 
  2 
  C 
  

  

  