﻿ANNIVERSARY 
  ADDRESS 
  OF 
  THE 
  PRESIDENT. 
  II3 
  

  

  the 
  Upper 
  Limestones 
  to 
  the 
  top 
  of 
  the 
  Lower 
  Calcareous 
  Grit, 
  a 
  

   thickness 
  of 
  136 
  feet. 
  This 
  Forge- 
  valley 
  section 
  is 
  more 
  complete 
  

   than 
  those 
  exposed 
  on 
  the 
  coast. 
  The 
  characteristic 
  fossils 
  Cylin- 
  

   drites 
  elongatus, 
  Gervillia 
  aviculoides, 
  and 
  Rhynchonella 
  Thurmanni 
  

   occur 
  in 
  the 
  White 
  Quarry 
  or 
  upper 
  portion 
  of 
  the 
  Lower 
  Lime- 
  

   stones. 
  The 
  authors 
  correlate 
  the 
  Oolites 
  of 
  Scarborough 
  Castle 
  

   Hill 
  with 
  the 
  Lower 
  Oolite 
  of 
  the 
  Forge-valley 
  section, 
  the 
  fossil 
  

   remains 
  confirming 
  this. 
  The 
  Seamer 
  district 
  (Seamer, 
  Ayton, 
  and 
  

   Brompton) 
  have 
  yielded 
  a 
  large 
  fauna: 
  38 
  species, 
  14 
  univalves, 
  

   19 
  bivalves, 
  3 
  Echinoidea, 
  and 
  2 
  Corals 
  are 
  catalogued 
  ; 
  but 
  the 
  

   Crossgates 
  quarry 
  yields 
  others, 
  these 
  being 
  the 
  most 
  characteristic. 
  

   The 
  remarkable 
  outlier 
  at 
  Hackness, 
  which 
  exhibits 
  the 
  whole 
  Coral- 
  

   lian 
  system 
  resting 
  on 
  the 
  Oxford 
  Clay 
  which 
  passes 
  down 
  into 
  the 
  

   Kellaways 
  Rock, 
  is 
  described. 
  The 
  following 
  series 
  occurs 
  in 
  " 
  Silpho 
  

   Heights:"— 
  

  

  CI. 
  Upper 
  Calcareous 
  Grit. 
  

  

  Upper 
  J 
  2. 
  Upper 
  or 
  true 
  Coral 
  Rag. 
  

  

  Limestones. 
  1 
  3. 
  Coralline 
  Limestone 
  (Bell-Heads 
  Limestone). 
  

  

  |^4. 
  Gritty 
  limestone 
  and 
  sandy 
  beds 
  (Middle 
  Calcareous 
  Grit). 
  

  

  T 
  f 
  5. 
  Lower 
  Oolite 
  series, 
  

  

  l^ower 
  i 
  Q 
  Lower 
  Coral 
  Eag> 
  

  

  limestones. 
  ^ 
  7 
  Basement 
  or 
  p 
  asgage 
  -beds. 
  (In 
  all 
  about 
  80 
  feet.) 
  

  

  These 
  beds 
  are 
  separately 
  described, 
  and 
  their 
  fossil 
  contents 
  given 
  

   for 
  the 
  chief 
  forms 
  (about 
  30 
  species). 
  

  

  The 
  Pickering 
  District. 
  

  

  This 
  classical 
  area 
  receives 
  most 
  careful 
  attention, 
  and 
  is 
  exhaus- 
  

   tively 
  treated. 
  A 
  complete 
  section 
  of 
  all 
  the 
  Corallian 
  beds 
  is 
  seen 
  

   in 
  the 
  gorge 
  of 
  Newtondale, 
  at 
  the 
  outlet 
  of 
  which 
  lies 
  Pickering. 
  

   The 
  upper 
  portion 
  is, 
  as 
  the 
  authors 
  say, 
  magnificently 
  displayed 
  in 
  

   the 
  numerous 
  quarries 
  near 
  the 
  town. 
  The 
  succession 
  is 
  as 
  follows 
  

   in 
  the 
  deep 
  gorge 
  of 
  JNewtondale 
  : 
  — 
  

  

  feet. 
  

  

  Supracoralline 
  beds 
  20 
  

  

  Upper 
  Limestones 
  50 
  

  

  Trigonia 
  beds 
  and 
  Middle 
  Calcareous 
  Grit 
  . 
  . 
  45 
  

  

  Lower 
  Limestones 
  60 
  

  

  Ditto, 
  including 
  basement 
  or 
  Passage-beds 
  . 
  30 
  

   Lower 
  Calcareous 
  Grit 
  ( 
  sa 
  y) 
  100 
  

  

  305 
  

  

  A 
  generalized 
  section 
  of 
  the 
  Pickering 
  beds 
  is 
  given 
  on 
  p. 
  335, 
  

   and 
  also 
  a 
  detailed 
  description 
  of 
  the 
  Upper, 
  Middle, 
  and 
  Lower 
  di- 
  

   visions, 
  or 
  the 
  Supracoralline 
  beds, 
  Upper 
  Limestones, 
  and 
  the 
  Shell- 
  

   beds 
  and 
  grits 
  (Middle 
  Calcareous 
  Grit 
  in 
  part). 
  The 
  most 
  richly 
  

   fossiliferous 
  of 
  all 
  the 
  divisions 
  is 
  that 
  of 
  the 
  Shell-beds 
  and 
  grits 
  

   (Middle 
  Calcareous 
  Grit) 
  ; 
  nearly 
  all 
  the 
  fossils 
  in 
  collections 
  marked 
  

   Pickering 
  are 
  from 
  this 
  horizon. 
  36 
  species 
  were 
  obtained 
  by 
  the 
  

   authors 
  from 
  the 
  three 
  Trigonia-beds 
  in 
  this 
  lower 
  group. 
  Trigonia 
  

   perlata, 
  T. 
  Meriani, 
  Chemnitzia 
  heddingtonensis, 
  Littorina 
  muricata, 
  

   Ceritliium 
  muricatum, 
  Gervillia 
  aviculoides, 
  Cucullcea 
  corallina, 
  Avi- 
  

  

  VOL. 
  XXXVIII. 
  Jc 
  

  

  