﻿9 
  2 
  

  

  PKOCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  Dr. 
  Lycett, 
  in 
  1850, 
  on 
  purely 
  palseontological 
  grounds, 
  Mr. 
  S. 
  

   Sharp, 
  of 
  Dallington 
  Hall, 
  Northampton, 
  Mr. 
  Beesley, 
  of 
  Banbury, 
  

   Prof. 
  J. 
  W. 
  Judd, 
  and 
  the 
  Bev. 
  T. 
  W. 
  Norwood, 
  through 
  evidence 
  in 
  

   the 
  " 
  Cave 
  " 
  district, 
  long 
  ago 
  came 
  to 
  the 
  same 
  conclusion 
  on 
  studying 
  

   the 
  northern 
  prolongation 
  of 
  the 
  Lincolnshire 
  Limestone 
  across 
  the 
  

   Humber 
  — 
  viz. 
  that 
  the 
  fossil 
  contents 
  closely 
  agreed 
  with 
  those 
  of 
  

   the 
  Pea-grit 
  or 
  lowest 
  member 
  of 
  the 
  Inferior 
  Oolite 
  of 
  Cheltenham. 
  

  

  Prof. 
  Judd, 
  in 
  his 
  exhaustive 
  work 
  on 
  the 
  geology 
  of 
  Butland 
  *, 
  

   has 
  cleared 
  up 
  in 
  the 
  most 
  conclusive 
  manner 
  the 
  relations 
  existing 
  

   between 
  the 
  several 
  members 
  of 
  the 
  Lower 
  Oolite 
  of 
  the 
  Midland 
  

   counties 
  ; 
  the 
  vexed 
  questions 
  as 
  to 
  the 
  age 
  and 
  position 
  of 
  the 
  

   Northampton 
  Sands, 
  the 
  Collyweston 
  Slates, 
  the 
  Lincolnshire 
  Lime- 
  

   stone, 
  the 
  position 
  and 
  history 
  of 
  the 
  Lower 
  and 
  Upper 
  Estuarine 
  

   beds, 
  the 
  distribution 
  and 
  correlation 
  of 
  the 
  Great 
  Oolite 
  and 
  its 
  

   fossils, 
  and 
  the 
  Great 
  Oolite 
  clay, 
  are 
  all 
  ably 
  worked 
  out 
  by 
  the 
  

   author. 
  Prof. 
  Judd 
  has 
  also 
  dealt 
  with 
  the 
  Lower, 
  Middle, 
  and 
  

   Upper 
  Lias 
  and 
  their 
  subdivisions 
  and 
  modern 
  nomenclature. 
  The 
  

   whole 
  volume 
  is 
  an 
  able 
  exposition 
  of 
  the 
  present 
  aspect 
  of 
  Jurassic 
  

   geology. 
  In 
  this 
  memoir, 
  besides 
  the 
  detailed 
  description 
  of 
  the 
  

   geological 
  structure 
  of 
  the 
  county 
  of 
  Butland, 
  Prof. 
  Judd 
  enters 
  fully 
  

   into 
  the 
  purely 
  scientific 
  questions 
  connected 
  with 
  the 
  history 
  of 
  the 
  

   Jurassic 
  rocks, 
  especially 
  those 
  that 
  characterize 
  the 
  Midland 
  district 
  

   of 
  England, 
  his 
  investigations 
  there 
  between 
  the 
  years 
  1867 
  and 
  

   1871 
  leading 
  him 
  to 
  propose 
  a 
  new 
  nomenclature 
  and 
  classification 
  

   for 
  the 
  Oolitic 
  rocks 
  of 
  that 
  area. 
  Greatly 
  was 
  Mr. 
  Judd 
  aided 
  by 
  

   Mr. 
  S. 
  Sharp, 
  whose 
  large 
  local 
  collection 
  and 
  extensive 
  and 
  accurate 
  

   knowledge 
  of 
  the 
  county 
  were 
  both 
  placed 
  at 
  his 
  disposal. 
  The 
  two 
  

   memoirs 
  by 
  Mr. 
  Sharp 
  upon 
  the 
  Northamptonshire 
  Oolites 
  already 
  

   noticed 
  ably 
  maintained 
  and 
  exemplified 
  the 
  views 
  of 
  Mr. 
  Judd. 
  

  

  The 
  first 
  thirty-two 
  pages 
  of 
  Prof. 
  Judd's 
  memoir 
  are 
  devoted 
  to 
  

   the 
  three 
  divisions 
  of 
  the 
  Lias, 
  with 
  a 
  tabular 
  correlation 
  and 
  ar- 
  

   rangement 
  of 
  the 
  several 
  known 
  classifications 
  : 
  — 
  

  

  1. 
  The 
  English 
  classification. 
  

  

  2. 
  Continental. 
  

  

  3. 
  Divisions 
  of 
  Quenstedt. 
  

  

  4. 
  Ammonite 
  Zones 
  (16). 
  

  

  This, 
  as 
  showing 
  the 
  received 
  nomenclature 
  and 
  accepted 
  zonal 
  

   classification 
  according 
  to 
  the 
  Ammonitidse, 
  I 
  deem 
  it 
  important 
  to 
  

   give 
  here 
  with 
  some 
  modifications 
  (Table 
  IX.) 
  : 
  — 
  

  

  * 
  Mem. 
  Geol. 
  Survey 
  of 
  England 
  and 
  Wales, 
  Geology 
  of 
  Kutland 
  and 
  parts 
  

   of 
  Lincoln, 
  Leicester, 
  Northampton, 
  &c. 
  By 
  J. 
  W. 
  Judd, 
  F.Gr.S., 
  with 
  Ap- 
  

   pendix 
  and 
  Tables 
  of 
  Fossils 
  by 
  E. 
  Etheridge, 
  F.B.S., 
  1875. 
  

  

  