﻿Geological 
  Sketch-map 
  of 
  Co. 
  Donegal 
  to 
  illuitmu 
  a 
  D 
  , 
  ^ 
  J. 
  G. 
  S. 
  vol. 
  xx. 
  To 
  face 
  p. 
  268. 
  

  

  y 
  '** 
  ™ 
  Paper 
  on 
  the 
  Granites 
  of 
  Ireland 
  by 
  the 
  Rev. 
  Prof. 
  Haughton. 
  

  

  sS: 
  Quartz-rock. 
  

  

  si 
  

  

  J 
  >'-0' 
  ^ 
  . 
  • 
  

  

  Crystalline 
  Limestone. 
  

  

  .Mica-slate. 
  

  

  Greenstone. 
  Syenite, 
  Ike. 
  

   Granite. 
  

  

  jgc^l 
  Limestone 
  in 
  Mica-slate. 
  

  

  