﻿550 
  Geological 
  Society 
  : 
  — 
  

  

  2. 
  l 
  The 
  Sequence 
  of 
  the 
  Cambrian 
  and 
  Associated 
  Beds 
  of 
  the 
  

   Malvern 
  Hills/' 
  By 
  Prof. 
  Theodore 
  Thomas 
  Groom, 
  M.A., 
  D.Sc, 
  

   F.G.S. 
  With 
  an 
  Appendix 
  on 
  the 
  Brachiopoda 
  by 
  Charles 
  Alfred 
  

   Matley, 
  Esq., 
  B.Sc, 
  F.G.S. 
  

  

  The 
  series, 
  exclusive 
  of 
  some 
  600 
  feet 
  of 
  igneous 
  rocks, 
  may 
  be 
  

   estimated 
  at 
  between 
  2500 
  and 
  3000 
  feet, 
  and 
  consists 
  of 
  the 
  

   following 
  members, 
  tabulated 
  in 
  descending 
  order 
  : 
  — 
  

  

  4. 
  The 
  Bronsil 
  Shales, 
  1000 
  feet 
  thick; 
  grey 
  shales 
  containing 
  Dictyo- 
  

   nema 
  and 
  many 
  Tremadoc 
  brachiopods 
  and 
  trilobites. 
  

  

  3. 
  The 
  White-leaved 
  Oak 
  Shales; 
  black 
  shales, 
  including 
  : 
  

  

  (b) 
  The 
  zone 
  of 
  Peliura 
  scarabceoides, 
  Sph&rophthalmus 
  alatus, 
  Cteno- 
  

   pyge 
  pecten, 
  Ct. 
  bisulcata, 
  Agnostus 
  trisectus 
  ; 
  500 
  feet. 
  

  

  (a) 
  The 
  zone 
  containing 
  Kutorgina 
  pusilla, 
  Protospongia 
  fenestrata, 
  a 
  

  

  new 
  variety 
  of 
  Acrotrgta, 
  and 
  a 
  new 
  genus 
  of 
  the 
  Leperditiadas 
  ; 
  

   30 
  feet. 
  

  

  2. 
  The 
  Hollybush 
  Sandstone, 
  comprising 
  : 
  

  

  (b) 
  Massive 
  Sandstone 
  probably 
  not 
  less 
  than 
  1000 
  feet 
  thick, 
  and 
  

  

  containing 
  Kutorgina 
  Phillipsi, 
  Orthotheca 
  fistula, 
  Scolecoderma 
  

   antiquissima, 
  and 
  new 
  species 
  of 
  Hyolithus. 
  

  

  (a) 
  Flaggy 
  and 
  Shaly 
  Beds, 
  not 
  less 
  than 
  75 
  feet 
  thick; 
  chiefly 
  

   flaggy 
  and 
  shaly 
  glauconitic 
  sandstones, 
  with 
  Kutorgina 
  Phillipsi, 
  

   Scolecoderma 
  antiquissima, 
  Hyolithus, 
  etc. 
  

  

  1. 
  The 
  Malvern 
  Quartzite, 
  1 
  consisting 
  chiefly 
  of 
  grey 
  quartzites 
  and 
  

   conglomerates, 
  rarely 
  glauconitic 
  ; 
  probably 
  at 
  least 
  several 
  hundred 
  

   feet 
  thick 
  ; 
  containing 
  Kutorgina 
  Phillipsi, 
  Hyolithus 
  primcsvus, 
  and 
  

   a 
  new 
  species 
  of 
  Obolella. 
  

  

  The 
  last 
  rock, 
  though 
  now 
  separated 
  by 
  faults 
  from 
  the 
  older 
  

   Malvern 
  Series, 
  contains 
  angular 
  fragments 
  both 
  of 
  Uriconian 
  and 
  

   Malvernian 
  type. 
  It 
  is 
  correlated 
  with 
  the 
  Wrekin 
  Quartzite 
  and 
  

   with 
  the 
  lower 
  divisions 
  of 
  the 
  Hartshill 
  Quartzite. 
  The 
  Flaggy 
  

   and 
  Shaly 
  Beds 
  appear 
  to 
  correspond 
  with 
  the 
  Olenellus-be&s 
  and 
  

   the 
  zone 
  of 
  Paradoxides 
  Groomi 
  in 
  Shropshire. 
  The 
  bulk 
  of 
  the 
  

   Hollybush 
  Sandstone 
  probably 
  represents 
  the 
  greater 
  part 
  of 
  the 
  

   Paradoxidian 
  of 
  other 
  localities, 
  and 
  may 
  in 
  part 
  correspond 
  with 
  

   the 
  Purley 
  Beds 
  of 
  Nuneaton. 
  

  

  The 
  lower 
  division 
  of 
  the 
  White-leaved 
  Oak 
  Shales 
  may 
  represent 
  

   the 
  Swedish 
  zone 
  with 
  Beyricliia 
  Angelini, 
  and 
  perhaps 
  the 
  Festiniog* 
  

   Beds 
  of 
  North 
  Wales. 
  It 
  is, 
  however, 
  more 
  probable 
  that 
  it 
  

   represents 
  the 
  uppermost 
  portion 
  of 
  the 
  Paradoxidian. 
  The 
  greater 
  

   part 
  of 
  these 
  shales, 
  however, 
  belongs 
  to 
  the 
  zone 
  of 
  Sphcerophthalmus 
  

   alatus 
  ; 
  but 
  it 
  is 
  possible 
  that 
  other 
  zones, 
  both 
  immediately 
  above 
  

   and 
  immediately 
  below, 
  may 
  be 
  represented 
  in 
  the 
  district. 
  The 
  

   middle 
  part 
  of 
  the 
  Bronsil 
  Shales 
  has 
  yielded 
  Asaphids 
  and 
  Olenids 
  

   in 
  association 
  with 
  Dictyonema, 
  and 
  may 
  be 
  correlated 
  with 
  the 
  

   Tremadoc 
  Beds 
  which 
  yield 
  the 
  Euloma-Niobe 
  fauna. 
  The 
  author 
  

  

  1 
  [This 
  was 
  originally 
  termed 
  by 
  the 
  Author 
  ' 
  Hollybush 
  Quartzite.'] 
  

  

  