﻿Quart. 
  Journ. 
  Geol. 
  Soc. 
  Vol. 
  LIU. 
  

  

  [To 
  face 
  -p. 
  568. 
  

  

  I 
  — 
  Comparative 
  Table 
  op 
  Zonal 
  and 
  Divisional 
  Classification 
  (Cretaceous 
  Strata 
  of 
  Count? 
  Antrim). 
  

  

  Division. 
  

  

  Zone. 
  

  

  i 
  

  

  Zonal 
  Classification 
  Classification 
  of 
  

  

  of 
  Tate. 
  Barrois. 
  

  

  Classification 
  

  

  of 
  Gault. 
  

  

  Central 
  Division. 
  

  

  sats? 
  

  

  Southern 
  Division. 
  

  

  Central 
  Division. 
  

  

  Eastern 
  Division. 
  

  

  Penin 
  

  

  »»W 
  Division. 
  

  

  Northern 
  Division. 
  

  

  England. 
  § 
  

  

  Senonian 
  

   Uppeb 
  Chaik. 
  

  

  Macstrichtien. 
  

  

  Upper 
  port 
  of 
  White 
  

  

  

  

  

  

  

  

  

  

  

  White 
  Chalk 
  of 
  

   Trimminghara. 
  

  

  

  

  

  

  

  Selemnitella 
  

  

  White 
  Limestone; 
  

   zone 
  of 
  Januauiles 
  

   golleviUensis. 
  

  

  sjanigiariau 
  Zone. 
  

  

  Selemnitella 
  mucro- 
  

   nata 
  = 
  White 
  

   Limestone 
  with 
  

   flints. 
  

  

  Zone 
  of 
  

   Belemnitellas 
  

  

  = 
  White 
  Chalk. 
  

  

  Zone 
  of 
  Belemnitella 
  

  

  _ 
  \\ 
  ; 
  ii'i't','"l"',i,,','-lo 
  1 
  „. 
  

   with 
  flints. 
  

  

  White 
  Limestone 
  

   with 
  regular 
  layers 
  

   of 
  flint, 
  40 
  feet. 
  

  

  Mulatto 
  

  

  White 
  Limestone 
  

   with 
  regular 
  lavei- 
  

   of 
  flint 
  K'-.-.O 
  frrt 
  

   thick; 
  rich 
  fauna 
  

  

  places 
  flu- 
  Uulalh, 
  

   Stone 
  oreui's 
  at 
  the 
  

  

  base 
  of 
  this 
  zone. 
  

  

  White 
  Limestone 
  

  

  with 
  regular 
  bands 
  of 
  

  

  flint. 
  

  

  Large 
  ammonites 
  at 
  

  

  White 
  Limestone 
  

   with 
  flints. 
  Cephalo- 
  

  

  common 
  at 
  base. 
  

  

  White 
  Limestone 
  

   •ith 
  flints 
  100 
  feet 
  + 
  

  

  thick, 
  with 
  

   Bcliinocori/s 
  omtiis 
  

  

  While 
  Limestone, 
  

  

  Belenuiifcf!" 
  

  

  \Actinoc 
  ,| 
  

  

  quadrata. 
  

  

  R'i/ 
  '"-'M 
  ail>te* 
  

  

  = 
  Ckloritic 
  L'hnlk. 
  

  

  Wot 
  recognized. 
  

  

  Xnt 
  -peeiallv 
  vreoir- 
  

  

  nized. 
  Tabular 
  

   flint 
  at 
  base. 
  

  

  Nodular 
  Chalk, 
  zone 
  

  

  nf 
  />,/, 
  aniUdla 
  .1(77- 
  

   aoeaeia.r 
  i 
  <jaa<!raia. 
  

  

  Xrinssic 
  Marls 
  below. 
  

  

  Nodular 
  Chalk 
  with 
  

  

  lt,l< 
  i 
  ,nntcll«r.irfl. 
  

   nocama.v^lrot., 
  

  

  Not 
  recognized 
  as 
  

  

  Conglomeratic 
  beds 
  

   with 
  gasteropoda. 
  

  

  Belemnitella 
  

   [Actinocamax] 
  quad- 
  

  

  Chalk 
  with 
  Hints. 
  

  

  Selemnitella 
  

  

  [Actinocamax] 
  vera 
  

  

  or 
  Marsupites. 
  

  

  Absent. 
  

  

  White 
  Limestone 
  

   with 
  flints. 
  

  

  UhmritixOhalk. 
  

  

  

  JfHiiunihia.r 
  \ 
  I'ry/i. 
  

  

  with 
  Belemnitella 
  

  

  [_Aefin«eama,] 
  vera. 
  

  

  rocks. 
  

  

  Flintlcss 
  White 
  

   Limestone, 
  with 
  

   Belemnitella 
  

  

  Uetiaoc 
  a 
  ,,u,,r}rcra, 
  

   Marsupites, 
  and 
  

  

  "flints.'" 
  "" 
  

  

  Micraster 
  

   cor-anguinum. 
  

  

  Do. 
  

  

  Chloritic 
  Chalk. 
  

  

  

  Zone 
  of 
  EeJiiuncnr„s 
  

   gibbus 
  

  

  Not 
  represented. 
  

  

  Glauconitic 
  sandy 
  

  

  limestone 
  with 
  

  

  Echinocorys 
  gibbus 
  

  

  and 
  Camerospongia. 
  

  

  

  Chalk 
  with 
  zoned 
  

   flints. 
  

  

  Micraster 
  

  

  cor-tcstinJiiarrh'iii 
  . 
  

  

  Chalk 
  

  

  Do. 
  

  

  

  Iiin<'vra»>ns-v,onL>. 
  

   with 
  Micraster 
  

   breviporus 
  and 
  

  

  

  Terebratula 
  cornea 
  

   and 
  SerpulafiH- 
  

   formis; 
  Inoceramus- 
  

   bands 
  numerous 
  ; 
  

   Spondylus 
  spinosus 
  

   throughout 
  ; 
  Ostrea 
  

   semiplaiia 
  ; 
  Jlhyn- 
  

   ckonetta-banA. 
  

  

  Glauconitic 
  Lime- 
  

   stone, 
  with 
  Iuaec- 
  

   ra 
  mas-fragments. 
  

  

  Chalk 
  with 
  largo 
  

  

  \r;>;;i*l.e 
  ear-test 
  u- 
  

   ,ti„aein,e 
  abunilanl. 
  I 
  

   Nodular 
  rock 
  with 
  

  

  Tdeokian 
  

   Middle 
  Ckadk. 
  

  

  Kock. 
  

   Sol 
  aster 
  planus. 
  

  

  Do. 
  

  

  

  Zone 
  of 
  Tmii't 
  romus 
  

  

  Lowest 
  ]iart 
  of 
  pre- 
  

   belong 
  here. 
  

  

  Not 
  represented. 
  

  

  Micraster 
  breviporus 
  

  

  Not 
  known. 
  

  

  Mierast, 
  rhet 
  ripams. 
  

   or 
  Hoi 
  aster 
  r 
  la„es. 
  

   ami 
  chalk 
  with 
  same. 
  

  

  Terehratulina 
  

   gracilis. 
  

  

  Do. 
  

  

  Sandstone. 
  

  

  Unconformity. 
  

   Zone 
  of 
  Ostrea 
  

  

  Part 
  nf 
  tin- 
  K.yo 
  ; 
  ,,/ra 
  

   coh.vm.ba- 
  

  

  Callianassa 
  -beds 
  and 
  

   yellow 
  greensands 
  

  

  Part 
  of 
  the 
  yellow- 
  

   green 
  sands 
  with 
  

  

  Do. 
  

  

  Soft 
  white 
  chalk, 
  or 
  

  

  with 
  marly 
  hamls, 
  

   and 
  with 
  l'< 
  rel/ratit- 
  

  

  I'll 
  t,i\ 
  rcnrt's 
  lehinh's 
  

   or 
  Rlii/nchmicllc 
  

  

  Melbourn 
  

  

  Do. 
  

  

  

  

  /nnenia\ 
  lu'lciTi-- 
  lu-l-r. 
  

  

  with 
  (isli-teeth. 
  ami 
  

  

  illr 
  rl.roiijfrit-cohttillni 
  

  

  hand 
  n 
  u 
  ly 
  belong 
  here, 
  

  

  Ostrea 
  semiplaiia 
  

   may 
  belong 
  to 
  the 
  

   Tnronian. 
  

  

  Do. 
  

  

  IiHTeasin-lv 
  laidular 
  

   chalk 
  with 
  Taaei 
  ra- 
  

   mus 
  lahiatt/s. 
  

  

  

  Rock. 
  

   B,h, 
  unites 
  [Aetino- 
  

  

  

  

  

  

  

  

  Do. 
  

  

  with 
  Beleauiites 
  

  

  

  

  

  

  

  Cenomanian 
  

  

  _ 
  InniKul'tfcx 
  ' 
  Atritilll"- 
  

  

  ceras~) 
  rotouiaiimsis. 
  

  

  Clilorifii* 
  Sands 
  anil 
  

  

  Sandstones. 
  

   "Exogyra 
  

  

  Yellow 
  Sandstones 
  

  

  Zone 
  of 
  Jlolaster- 
  

  

  Sxogyra 
  eohtmba- 
  

  

  ., 
  . 
  ,. 
  ,. 
  Yellow- 
  screen 
  sands 
  

   Major 
  portion 
  ot 
  wl 
  n, 
  E,,,,,,,,,, 
  

   '••■'".'/.";■" 
  eahneba. 
  ,.„,„,„,,„ 
  „ 
  m 
  [ 
  ',.„,„. 
  

   zone 
  should 
  be 
  re. 
  , 
  ,,,,„,„,„„.,■„,, 
  

   ferred 
  here. 
  ! 
  r 
  ' 
  J 
  

   Trh/ouire. 
  Ostrea 
  . 
  |m 
  , 
  ,;]. 
  lm 
  . 
  omt 
  i,. 
  ,..,) 
  

   c'ariaata. 
  and 
  ! 
  'Varrnnl 
  'amUnta- 
  . 
  " 
  

   Orh.talraa 
  at 
  the 
  „. 
  Ml 
  m 
  „,„,,„„„„„ 
  

   Dase 
  - 
  Srhlmnbaehi. 
  

  

  

  

  Do. 
  

  

  Grey 
  Chalk 
  with 
  

   large 
  ammonites, 
  

  

  Nautili, 
  and 
  

   Terebratula. 
  

  

  Lower 
  Chalk. 
  

  

  Aiiiin-iitiits 
  , 
  Srlilii 
  n- 
  

  

  cohimba 
  

  

  and 
  Grey 
  Marls. 
  

  

  subglobosus. 
  

  

  /ni 
  "' 
  ( 
  Tii<ii(V' 
  :ilt 
  m 
  

  

  . 
  Chalk 
  Marl 
  with 
  

   Ammonites 
  varians 
  

   l 
  '°- 
  | 
  and 
  Bhyncnonella 
  

   Martini, 
  

  

  i 
  

  

  

  Chloritic 
  Marl. 
  

  

  Grispi- 
  

  

  

  

  Nodules 
  possibly. 
  

   Yellow 
  Sitii'l.-ti 
  in> 
  

  

  tol 
  sr 
  I 
  

  

  

  i 
  Bed 
  with 
  brown 
  

   nodules. 
  

  

  Uppke 
  

   Gueensahd. 
  

  

  Fecten 
  asper. 
  

  

  Yellow 
  Sandstones 
  

   = 
  zone 
  of 
  Ostrea 
  

  

  Glauconitic 
  Sands. 
  

  

  Zone 
  of 
  Pecten 
  

  

  rurintita, 
  Panoptsa 
  

  

  iiHimlihula, 
  etc. 
  

  

  Micrabacia 
  coranula. 
  

  

  Do. 
  

  

  In 
  the 
  west, 
  yellow- 
  

   sands 
  with 
  cherts. 
  

  

  

  (ilaui'iniitii- 
  Sands 
  

   = 
  zone 
  of 
  Ji.r,i,///ru 
  

  

  Note. 
  — 
  Barrois 
  

  

  adopts 
  Tate's 
  zonal 
  

  

  

  and 
  Glauconitic 
  

   Sands 
  = 
  zone 
  of 
  

   Ernyyra 
  canira. 
  

  

  ,,„/„, 
  Pm««i 
  »<■/.; 
  

  

  'eularis. 
  Large 
  

   Dimyarian 
  mol- 
  

  

  Glauconitic 
  Sands, 
  

   ir.i, 
  w. 
  la 
  oigata, 
  

  

  Qiany 
  stunted 
  

   brac'hiopoda, 
  and 
  

   numerous 
  species 
  of 
  

   subgenus 
  Chlamys. 
  

  

  Glauconitic 
  Sands, 
  

   with 
  Wxogyra 
  

  

  enuica, 
  var. 
  laevigata 
  

  

  In 
  the 
  west, 
  niiearemis 
  

  

  greensand 
  with 
  

   l<lear/yra 
  coniea. 
  etc. 
  

  

  

  

  

  1 
  

  

  

  

  

  

  

  

  

  

  

  