﻿Vol. 
  53.] 
  THE 
  CRETACEOUS 
  STRATA 
  OF 
  COUNTY 
  ANTRIM. 
  563 
  

  

  This 
  matter 
  will 
  be 
  more 
  fully 
  dealt 
  with 
  when 
  discussing 
  the 
  

   general 
  stratigraphical 
  relationship 
  (p. 
  594). 
  

  

  Besides 
  the 
  Inoceramus-band 
  which 
  was 
  accompanied 
  by 
  this 
  

   rich 
  fauna, 
  two 
  others 
  occur, 
  but 
  these 
  did 
  not 
  yield 
  any 
  other 
  fossil 
  

   forms. 
  A 
  yellow-green 
  sandy 
  layer 
  separates 
  the 
  red 
  glauconitic 
  

   limestone 
  from 
  a 
  flaky 
  yellow 
  sandstone 
  appearing 
  at 
  the 
  base. 
  

  

  The 
  Sponge-layer 
  bed 
  was 
  observed 
  on 
  the 
  shore 
  at 
  Waterloo, 
  

   above 
  it 
  being 
  the 
  layer 
  with 
  green 
  sponge-nodules. 
  

  

  Inland, 
  at 
  Ballycraigie 
  Bridge, 
  near 
  Killyglen, 
  a 
  pink 
  chalk 
  was 
  

   seen, 
  containing 
  Ventriculites, 
  Rhynchonella 
  sp., 
  Spondylus 
  sp., 
  

   Ostrea 
  vesicularis, 
  Lam., 
  and 
  Belemnitella 
  mucronata, 
  Schloth. 
  

  

  At 
  the 
  time 
  of 
  our 
  visit, 
  a 
  cutting 
  was 
  being 
  made 
  in 
  the 
  road, 
  

   the 
  upper 
  part 
  of 
  which 
  was 
  composed 
  of 
  yellow, 
  the 
  lower 
  of 
  bluish- 
  

   green 
  sands. 
  The 
  presence 
  of 
  Vermicularice 
  in 
  the 
  upper 
  part 
  

   makes 
  it 
  probable 
  that 
  these 
  beds 
  represent 
  the 
  Yellow 
  Sandstones, 
  

   Glauconitic 
  Marls, 
  and 
  possibly 
  the 
  Glauconitic 
  Sandstones. 
  

  

  Ballygalley 
  Head. 
  

  

  A 
  little 
  to 
  the 
  south 
  of 
  this 
  head, 
  nearly 
  4 
  miles 
  north 
  of 
  

   Larne, 
  Barrois 
  examined 
  an 
  interesting 
  exposure. 
  A 
  band 
  of 
  

   rolled 
  nodules 
  separated 
  the 
  white 
  chalk-with-flints 
  from 
  a 
  slightly 
  

   glauconitic 
  limestone 
  (1 
  foot 
  thick), 
  this 
  again 
  overlying 
  3 
  feet 
  

   of 
  hard 
  glauconitic 
  limestone, 
  very 
  rich 
  in 
  fossils. 
  These 
  include 
  

   Belemnitella 
  sp., 
  Serpula, 
  Inoceramus 
  sp., 
  Ostrea 
  canaliculata, 
  

   d'Orb., 
  0. 
  semiplana, 
  Sow., 
  Spondylus 
  spinosus, 
  Sow., 
  Terebra- 
  

   tula 
  semiglobosa, 
  Sow., 
  Rhynchonella 
  plicatilis, 
  Sow., 
  Cidaris 
  

   sceptrifera, 
  Mant., 
  Oalerites 
  conicus 
  (Breyn.), 
  Echinocorys 
  gibbus, 
  

   Lam., 
  Parasmilia 
  centralis, 
  IVIant., 
  and 
  numerous 
  sponges, 
  notably 
  

   CJamerospongia 
  fungiformis, 
  Goldf., 
  and 
  Eiheridgia 
  mirabilis, 
  Tate, 
  a 
  

   fauna 
  which 
  in 
  many 
  respects 
  resembles 
  that 
  of 
  the 
  red 
  rock 
  at 
  

   Waterloo, 
  and 
  is 
  very 
  similar 
  to 
  that 
  of 
  the 
  glauconitic 
  limestone 
  

   below 
  the 
  main 
  sponge-bed 
  at 
  Blackhead. 
  

  

  Beneath 
  the 
  limestone 
  is 
  a 
  very 
  sandy 
  glauconitic 
  rock, 
  a 
  bed 
  

   consisting 
  of 
  fragments 
  of 
  Inocerami, 
  associated 
  with 
  pebbles, 
  while 
  

   the 
  base 
  of 
  these 
  Chloritic 
  Sands 
  consists 
  of 
  a 
  soft 
  sandstone, 
  con- 
  

   taining 
  large 
  grains 
  of 
  quartz 
  and 
  glauconite, 
  the 
  only 
  fossil 
  observed 
  

   being 
  Spondylus 
  spinosus. 
  

  

  The 
  Yellow 
  Sandstone 
  is 
  possibly 
  represented 
  by 
  a 
  soft 
  sand- 
  

   stone 
  containing 
  cherty 
  nodules. 
  

  

  The 
  White 
  Chalk 
  between 
  Ballygalley 
  Head 
  and 
  Glenarm 
  pos- 
  

   sesses 
  a 
  very 
  simple 
  fauna, 
  Belemnitella 
  mucronata, 
  Schloth., 
  Rhyn- 
  

   chonella 
  octoplicata, 
  Sow., 
  Rh. 
  limbata, 
  Schloth., 
  Echinocorys 
  scutatus, 
  

   Leske, 
  and 
  Magas 
  pumilus, 
  Sow., 
  recurring 
  with 
  monotonous 
  regu- 
  

   larity. 
  Only 
  at 
  one 
  locality, 
  2 
  miles 
  south 
  of 
  Glenarm, 
  were 
  the 
  

   lower 
  beds 
  visible. 
  There 
  the 
  succession 
  is, 
  beginning 
  at 
  the 
  top 
  : 
  — 
  

  

  1. 
  Chalk 
  with 
  regular 
  layers 
  of 
  flint. 
  

  

  2. 
  Chalk, 
  with 
  irregularly-scattered 
  flints, 
  having 
  a 
  nodular 
  character 
  at 
  the 
  

   base. 
  

  

  3. 
  Glauconitic 
  Chalk, 
  2 
  feet 
  below 
  becoming 
  

  

  4. 
  Quartzose 
  glauconitic 
  limestone 
  with 
  pebbles 
  § 
  inch 
  or 
  more 
  in 
  diameter. 
  

  

  2p2 
  

  

  