﻿Vol. 
  53.] 
  THE 
  CEETACEOTTS 
  STRATA 
  OF 
  COUNTY 
  ANTEIItf. 
  557 
  

  

  The 
  Cretaceous 
  exposures 
  north 
  of 
  "Woodburn 
  Glen, 
  in 
  Island- 
  

   magee, 
  are 
  among 
  the 
  most 
  interesting 
  of 
  the 
  whole 
  series, 
  and 
  as 
  

   many 
  of 
  these 
  have 
  been 
  but 
  lightly 
  touched 
  upon 
  by 
  previous 
  writers, 
  

   it 
  may 
  be 
  advisable 
  to 
  deal 
  with 
  them 
  more 
  fully 
  here. 
  Near 
  

   Castle 
  Dobbs, 
  3 
  miles 
  north-east 
  of 
  Carrickfergus, 
  the 
  officers 
  of 
  the 
  

   Geological 
  Survey 
  observed 
  a 
  chloritic 
  sandstone, 
  containing 
  abundant 
  

   specimens 
  of 
  Terebratula 
  carnea, 
  Sow., 
  small 
  Exogyra 
  columba, 
  Lam., 
  

   Inoceramus 
  sp., 
  Spondylus 
  spinosus, 
  Sow., 
  Eehinocorys 
  scutatus, 
  

   Leske, 
  and 
  a 
  Oalerites 
  hesitatingly 
  referred 
  to 
  G. 
  subrotundus 
  

   (Breyn.). 
  At 
  Seamount, 
  about 
  4 
  miles 
  north-east 
  of 
  Carrick- 
  

   fergus, 
  the 
  chloritic 
  sandstone 
  has 
  also 
  been 
  recorded 
  by 
  them, 
  but 
  

   with 
  quite 
  a 
  distinct 
  fauna 
  : 
  Rhynchonella 
  limbata, 
  Dav., 
  Serpula 
  

   \_Galeolaria~] 
  plexus 
  (Sow.), 
  and 
  Lamna 
  acuminata, 
  Ag., 
  being 
  the 
  

   principal 
  occurrences. 
  

  

  Whitehead. 
  

  

  The 
  Glauconitic 
  Sands, 
  which 
  were 
  well 
  exposed 
  during 
  the 
  

   construction 
  of 
  the 
  tunnel 
  between 
  Carrickfergus 
  and 
  Whitehead, 
  

   have 
  been 
  described 
  by 
  Tate. 
  At 
  the 
  present 
  time 
  the 
  lower 
  

   strata 
  are 
  not 
  clearly 
  exhibited, 
  though 
  south 
  of 
  the 
  tunnel 
  

   Mr. 
  Bell 
  found 
  a 
  glauconitic 
  sandstone 
  crowded 
  with 
  WiyncltoneUa 
  

   Schloenbachi, 
  Dav., 
  a 
  fossil 
  which 
  appears 
  to 
  be 
  especially 
  

   characteristic 
  of 
  the 
  lower 
  part 
  of 
  the 
  Chloritic 
  Sandstone, 
  or 
  zone 
  

   of 
  Exogyra 
  columba. 
  

  

  South 
  of 
  Whitehead 
  is 
  a 
  large 
  chalk-quarry, 
  now 
  unworked, 
  in 
  

   the 
  upper 
  part 
  of 
  which 
  the 
  somewhat 
  flattened 
  flints 
  are 
  in 
  regular 
  

   layers, 
  these 
  becoming 
  more 
  scattered 
  and 
  irregular 
  towards 
  the 
  

   base 
  of 
  the 
  section, 
  the 
  chalk 
  at 
  the 
  same 
  time 
  being 
  of 
  a 
  more 
  

   bluish 
  tint. 
  In 
  the 
  lower 
  part 
  of 
  the 
  quarry, 
  large 
  ammonites 
  

   were 
  very 
  abundant, 
  and 
  have 
  been 
  commonly 
  referred 
  to 
  A. 
  leives- 
  

   iensis, 
  Sharpe. 
  As 
  under 
  this 
  name 
  several 
  species 
  possibly 
  may 
  be 
  

   included, 
  a 
  revision 
  of 
  the 
  specimens 
  obtained 
  at 
  this 
  locality 
  would 
  

   be 
  advisable, 
  but 
  it 
  is 
  doubtful 
  whether 
  any 
  remain 
  in 
  a 
  sufficiently 
  

   good 
  state 
  of 
  preservation 
  to 
  admit 
  of 
  a 
  more 
  accurate 
  determination. 
  

  

  On 
  the 
  sea-shore 
  at 
  Whitehead 
  the 
  base 
  of 
  the 
  Chalk 
  is 
  exposed, 
  

   here 
  consisting 
  of 
  a 
  compact 
  white 
  limestone 
  containing 
  Belernnitella 
  

   [Actinocamax~\ 
  vera 
  (Mil.). 
  A 
  layer 
  of 
  tabular 
  flints 
  separates 
  

   this 
  from 
  the 
  Spongiarian 
  zone, 
  characterized 
  by 
  the 
  abundance 
  

   of 
  the 
  sponge-remains. 
  The 
  upper 
  part 
  of 
  this 
  band 
  consists 
  of 
  a 
  

   limestone 
  full 
  of 
  green 
  nodules, 
  which 
  in 
  most 
  cases 
  show 
  distinct 
  

   sponge-structure. 
  In 
  the 
  lower 
  portion 
  the 
  sponges 
  are 
  closely 
  

   crowded, 
  and 
  include 
  Ventriculites 
  cribrosus. 
  Phil., 
  V. 
  radiatus, 
  

   Mant., 
  Coscinopora 
  infundibuliformis, 
  Goldf., 
  Etheridgia 
  mirabilis, 
  

   Tate, 
  probably 
  Plocoscypliia, 
  and 
  possibly 
  BecJcsia. 
  

  

  A 
  glauconitic 
  sandy 
  limestone 
  full 
  of 
  Inoceramus-frngments 
  

   completes 
  the 
  section, 
  the 
  rocks 
  lower 
  than 
  this 
  being 
  covered 
  by 
  

   seaweed, 
  and 
  only 
  visible 
  at 
  low 
  tide. 
  

  

  From 
  Whitehead 
  a 
  path 
  passes 
  round 
  Blackhead, 
  a 
  bold 
  head- 
  

   land 
  formed 
  by 
  the 
  Lower 
  Amygdaloidal 
  Basalt. 
  The 
  amygdaloidal 
  

  

  