﻿^°1« 
  53*] 
  TKE 
  CRETACEOUS 
  STRATA 
  OF 
  COUNTY 
  ANTRIM. 
  565 
  

  

  existence 
  of 
  Turonian 
  strata 
  in 
  Ireland. 
  It 
  is 
  in 
  view 
  of 
  these 
  

   facts 
  that 
  I 
  have 
  dealt 
  at 
  some 
  length 
  with 
  the 
  description 
  of 
  this 
  

   district. 
  

  

  (4) 
  The 
  Peninsular 
  or 
  Insular 
  Division. 
  

  

  (Between 
  Cushendall 
  and 
  Ballycastle, 
  and 
  Western 
  

   Cretaceous 
  exposures 
  of 
  Co. 
  Deny.) 
  

  

  North 
  of 
  Cushendall 
  the 
  coast 
  consists 
  mainly 
  of 
  rocks 
  far 
  older 
  

   than 
  the 
  Cretaceous, 
  though 
  on 
  the 
  hill-slopes 
  patches 
  of 
  Chalk 
  are 
  

   from 
  time 
  to 
  time 
  visible 
  under 
  the 
  cappings 
  of 
  basalt. 
  In 
  one 
  

   locality 
  only, 
  namely, 
  at 
  Murlough 
  Bay, 
  near 
  Buebane 
  Point, 
  6 
  miles 
  

   east 
  of 
  Ballycastle, 
  the 
  junction 
  of 
  the 
  Chalk 
  with 
  the 
  underlying 
  

   beds 
  is 
  clearly 
  displayed. 
  (See 
  PI. 
  XLIV.) 
  Here 
  the 
  red 
  Triassic 
  

   sandstone 
  is 
  separated 
  from 
  the 
  White 
  Limestone 
  by 
  a 
  well-marked 
  

   conglomerate, 
  a 
  foot 
  thick, 
  consisting 
  of 
  pebbles 
  of 
  quartzite, 
  1 
  inch 
  

   in 
  diameter, 
  vein-quartz, 
  mica-schist 
  fragments 
  (these 
  sometimes 
  

   also 
  included 
  in 
  the 
  Chalk 
  above), 
  red 
  sandstone, 
  and 
  Lias 
  nodules, 
  

   the 
  whole 
  being 
  enclosed 
  in 
  a 
  glauconitic 
  limestone. 
  Possils 
  are 
  

   sparsely 
  distributed, 
  Rhynchonella 
  octoplicata, 
  Sow., 
  being 
  the 
  most 
  

   conspicuous 
  species 
  present. 
  

  

  As 
  the 
  white 
  limestone 
  here 
  res.ts 
  so 
  closely 
  on 
  beds 
  of 
  sandstone, 
  

   it 
  seemed 
  advisable 
  to 
  take 
  samples 
  of 
  the 
  chalk 
  from 
  different 
  levels 
  

   above 
  the 
  Pebble-conglomerate, 
  with 
  a 
  view 
  to 
  determining 
  whether 
  

   denudation 
  of 
  the 
  land 
  had 
  ceased 
  suddenly, 
  or 
  whether 
  there 
  had 
  

   been 
  a 
  gradual 
  diminution 
  in 
  the 
  quantity 
  of 
  detrital 
  material. 
  

   Consequently, 
  specimens 
  were 
  selected 
  from 
  the 
  Pebble-conglomerate, 
  

   and 
  from 
  the 
  immediately 
  overlying 
  Chalk, 
  the 
  remaining 
  three 
  

   samples 
  of 
  chalk 
  being 
  obtained 
  at 
  intervals 
  of 
  6 
  feet 
  above. 
  The 
  

   results 
  are 
  described 
  in 
  the 
  Chemical 
  Section, 
  pp. 
  579-584 
  & 
  

   Table 
  II. 
  

  

  The 
  best 
  sections 
  in 
  this 
  division 
  are, 
  however, 
  to 
  the 
  west 
  in 
  

   Co. 
  Derry, 
  and 
  are 
  as 
  follows 
  : 
  — 
  

  

  Magherafelt, 
  Moneymore, 
  and 
  Tamlaght. 
  

  

  Prof. 
  Judd 
  has 
  placed 
  in 
  my 
  hands 
  a 
  collection 
  made 
  by 
  him 
  

   .at 
  Moneymore, 
  which 
  clearly 
  shows 
  the 
  presence 
  of 
  an 
  important 
  

   Cretaceous 
  beach 
  at 
  this 
  locality. 
  The 
  quartzite 
  and 
  quartz- 
  

   schist 
  pebbles 
  here 
  attain 
  considerable 
  dimensions, 
  one 
  being 
  over 
  

   3 
  inches 
  long, 
  2 
  broad, 
  and 
  f 
  thick. 
  Associated 
  with 
  these 
  

   are 
  a 
  number 
  of 
  organic 
  remains, 
  including 
  abundant 
  specimens 
  

   of 
  Galerites 
  abbreviates, 
  Goldf. 
  (very 
  small 
  and 
  low, 
  and 
  showing 
  

   but 
  little 
  trace 
  of 
  the 
  original 
  structure), 
  gasteropoda 
  (Trochus 
  

   or 
  Turbo, 
  Actceon, 
  Emarginulina), 
  pelecypoda 
  (Venus 
  sp., 
  Pecten 
  

   [Janira~] 
  quinquecostatus, 
  Sow., 
  Tnoceramws-fragments), 
  also 
  a 
  much- 
  

   rolled 
  Actinocamax, 
  in 
  outline 
  resembling 
  A. 
  Alfridi, 
  and 
  other 
  forms 
  

   which 
  do 
  not 
  permit 
  of 
  absolute 
  identification. 
  (For 
  Cretaceous 
  

   beaches, 
  see 
  p. 
  601.) 
  

  

  