﻿48 
  PROCEEDINGS 
  OP 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  light 
  is 
  thrown 
  by 
  this 
  Eeport 
  ; 
  to 
  many 
  geologists 
  the 
  evidence 
  

   showing 
  the 
  connexion 
  between 
  great 
  terrestrial 
  movements 
  and 
  the 
  

   metamorphism 
  of 
  rocks 
  will 
  prove 
  of 
  even 
  higher 
  interest 
  than 
  the 
  

   mere 
  physical 
  phenomena 
  of 
  distortion. 
  But 
  it 
  is 
  very 
  doubtful 
  

   whether 
  there 
  will 
  be 
  a 
  similar 
  amount 
  of 
  acquiescence 
  in 
  the 
  

   results. 
  In 
  a 
  subsequent 
  paragraph 
  I 
  may 
  have 
  to 
  call 
  attention 
  

   briefly 
  to 
  this 
  question 
  again 
  in 
  connexion 
  with 
  the 
  apparently 
  

   almost 
  hopeless 
  conflict 
  of 
  opinion 
  on 
  the 
  subject 
  of 
  metamorphism 
  

   that 
  has 
  been 
  brought 
  prominently 
  forward 
  by 
  the 
  recent 
  Geological 
  

   Congress. 
  

  

  Three 
  other 
  papers 
  of 
  considerable 
  length, 
  that 
  by 
  one 
  of 
  our 
  

   Secretaries, 
  l[r. 
  ITarr, 
  and 
  Prof. 
  H. 
  A. 
  Xicholson, 
  on 
  the 
  Stockdale 
  

   Shales, 
  that 
  by 
  lEr. 
  W. 
  Hill 
  on 
  the 
  Lower 
  Beds 
  of 
  the 
  Upper 
  Cre- 
  

   taceous 
  series 
  in 
  Lincolnshire 
  and 
  Yorkshire, 
  and 
  that 
  by 
  lEessrs. 
  

   Gardner, 
  Keeping, 
  and 
  lEonckton, 
  on 
  the 
  Upper 
  Eocene, 
  are 
  valu- 
  

   able 
  contributions 
  to 
  an 
  accurate 
  knowledge 
  of 
  English 
  stratigraphy. 
  

   All 
  are 
  the 
  results 
  of 
  long 
  and 
  painstaking 
  research, 
  and 
  in 
  all 
  the 
  

   details 
  are 
  an 
  essential 
  part 
  of 
  the 
  paper. 
  

  

  The 
  fifth, 
  the 
  longest 
  paper 
  of 
  all, 
  that 
  by 
  Prof. 
  J. 
  F. 
  Blake, 
  " 
  On 
  

   the 
  Monian 
  System 
  of 
  Eocks," 
  is 
  perhaps 
  the 
  most 
  ambitious 
  as 
  well. 
  

   Nearly 
  sixty 
  years 
  have 
  now 
  elapsed 
  since 
  Sedgwick 
  proposed 
  the 
  

   name 
  of 
  Cambrian 
  for 
  the 
  system 
  that 
  was 
  regarded 
  then, 
  as 
  by 
  

   many 
  geologists 
  it 
  still 
  is, 
  as 
  the 
  lowest 
  containing 
  organic 
  remains. 
  

   Hitherto 
  the 
  beds 
  beneath 
  the 
  Cambrian 
  have 
  been 
  classed 
  as 
  Pre- 
  

   Cambrian 
  or 
  Archaean, 
  and 
  although 
  many 
  names 
  have 
  been 
  con- 
  

   ferred 
  on 
  local 
  subdivisions, 
  and 
  some 
  attempts, 
  hitherto 
  not 
  dis- 
  

   tinguished 
  by 
  much 
  success, 
  have 
  been 
  made 
  to 
  correlate 
  these 
  

   subdivisions 
  in 
  different 
  regions, 
  the 
  question 
  of 
  classification 
  has 
  

   been, 
  almost 
  by 
  general 
  consent, 
  postponed 
  for 
  further 
  information. 
  

   Professor 
  Blake, 
  however, 
  holds 
  that 
  a 
  great 
  system 
  composed 
  

   three 
  subdivisions 
  can 
  be 
  traced 
  in 
  the 
  Island 
  of 
  Anglesey 
  and 
  the 
  

   county 
  of 
  Wicklow, 
  below 
  the 
  base 
  of 
  the 
  Cambrian 
  ; 
  that 
  this 
  Pre- 
  

   Cambrian 
  system 
  is 
  mainly 
  of 
  sedimentary 
  origin, 
  although 
  igneous 
  

   rocks 
  are 
  abundantly 
  developed 
  within 
  its 
  limits 
  : 
  that 
  in 
  short 
  the 
  

   " 
  Ionian 
  System," 
  as 
  he 
  proposes 
  to 
  call 
  it, 
  may 
  be 
  regarded 
  " 
  as 
  

   an 
  ordinary 
  stratified 
  system, 
  perhaps 
  fossiliferous 
  on 
  more 
  than 
  one 
  

   horizon, 
  and 
  constituting 
  the 
  lowest 
  member 
  of 
  the 
  sedimentary 
  

   series." 
  Some 
  suggestions 
  are 
  offered 
  as 
  to 
  the 
  correlation 
  of 
  various 
  

   Pre-Cambrian 
  rocks 
  in 
  other 
  parts 
  of 
  the 
  British 
  Islands 
  and 
  in 
  

   Belgium. 
  

  

  There 
  are 
  other 
  prizes 
  besides 
  fair 
  ladies 
  that 
  faint 
  hearts 
  fail 
  to 
  

  

  