﻿176 
  the 
  pembroke 
  earthquakes 
  of 
  1892 
  & 
  1893. 
  [may 
  1 
  89 
  7, 
  

  

  Discussion. 
  

  

  The 
  President 
  said 
  that 
  the 
  Author's 
  enquiries 
  into 
  the 
  relation- 
  

   ship 
  between 
  earthquakes 
  and 
  faults 
  were 
  of 
  great 
  interest. 
  It 
  is 
  

   well 
  known 
  that 
  the 
  older 
  rocks 
  in 
  Pembrokeshire 
  have 
  been 
  

   much 
  crushed 
  and 
  broken, 
  and 
  that 
  thrust-faults 
  of 
  great 
  mag- 
  

   nitude 
  occur 
  there. 
  It 
  is 
  also 
  a 
  fact 
  that 
  the 
  area 
  has 
  been 
  

   frequently 
  affected 
  by 
  earthquake-shocks, 
  one 
  of 
  which, 
  many 
  years 
  

   ago, 
  caused 
  serious 
  damage 
  to 
  the 
  Cathedral 
  of 
  St. 
  David's. 
  

  

  The 
  Rev. 
  J. 
  P. 
  Blake 
  remarked 
  upon 
  the 
  apparent 
  absence 
  of 
  any 
  

   signs 
  of 
  disturbance 
  on 
  the 
  surface. 
  If 
  these 
  earthquakes 
  were 
  due 
  

   to 
  slips, 
  it 
  was 
  strange 
  that 
  none 
  of 
  them 
  should 
  yield 
  this 
  evidence. 
  

   In 
  the 
  cases 
  previously 
  described 
  by 
  the 
  Author 
  the 
  principal 
  

   evidence 
  was 
  the 
  association 
  with 
  well-known 
  faults, 
  which 
  might 
  

   be 
  lines 
  of 
  fresh 
  dislocation 
  ; 
  but 
  in 
  the 
  present 
  instance 
  faults 
  had 
  

   to 
  be 
  hypothecated. 
  Though, 
  therefore, 
  the 
  speaker 
  believed 
  the 
  

   theory 
  to 
  be 
  the 
  true 
  one, 
  the 
  evidence 
  for 
  it 
  appeared 
  extremely 
  

   weak. 
  

  

  Mr. 
  H. 
  H. 
  Statham, 
  Mr. 
  W. 
  Whitaker, 
  and 
  Mr. 
  Mark 
  also 
  

   spoke. 
  

  

  