﻿288 
  THE 
  EED 
  ROCKS 
  TEAR 
  BUNMAH0N. 
  [May 
  1 
  8 
  97. 
  

  

  of 
  any 
  Silurian 
  beds 
  anywhere 
  in 
  the 
  South-east 
  of 
  Ireland. 
  In 
  

   order 
  to 
  consider 
  these 
  beds 
  to 
  be 
  of 
  Silurian 
  age, 
  we 
  should 
  have 
  

   to 
  suppose, 
  first, 
  the 
  folding, 
  cleaving, 
  and 
  upheaval 
  of 
  the 
  Ordo- 
  

   vician 
  rocks, 
  then 
  their 
  great 
  erosion, 
  then 
  their 
  depression 
  and 
  the 
  

   deposition 
  of 
  these 
  red 
  beds 
  on 
  their 
  edges 
  in 
  Silnrian 
  times, 
  then 
  

   the 
  faulting 
  and 
  tilting 
  of 
  these 
  beds 
  coupled 
  with 
  the 
  upheaval 
  of 
  

   the 
  area, 
  then 
  a 
  long 
  period 
  of 
  erosion 
  to 
  account 
  for 
  their 
  complete 
  

   removal 
  from 
  every 
  other 
  part 
  of 
  the 
  area, 
  then 
  again 
  depression 
  in 
  

   Upper 
  Old 
  Red 
  Sandstone 
  times. 
  And 
  in 
  support 
  of 
  such 
  views, 
  

   there 
  is 
  not 
  even 
  the 
  lithological 
  similarity 
  of 
  the 
  red 
  rocks 
  to 
  

   Silurian 
  beds, 
  much 
  less 
  the 
  occurrence 
  of 
  a 
  Silurian 
  fossil, 
  or 
  the 
  

   evidence 
  of 
  the 
  unconformable 
  overlap 
  upon 
  them 
  of 
  the 
  Upper 
  Old 
  

   Red 
  Sandstone, 
  which 
  Prof. 
  Hull 
  has 
  shown 
  everywhere 
  in 
  the 
  

   South 
  of 
  Ireland 
  rests 
  with 
  a 
  great 
  unconformity 
  upon 
  all 
  the 
  older 
  

   rocks, 
  including 
  the 
  Silurian. 
  There 
  is, 
  moreover, 
  not 
  another 
  

   section 
  in 
  the 
  area 
  in 
  which 
  any 
  similar 
  beds 
  occur, 
  except 
  those 
  

   belonging 
  to 
  undoubted 
  Old 
  Bed 
  Sandstone. 
  

  

  