﻿Plate 
  2 
  

  

  W. 
  J. 
  Miller, 
  photo 
  

   Grenville 
  light 
  gray, 
  very 
  quartzose 
  gneiss, 
  as 
  seen 
  in 
  the 
  quarry 
  near 
  

   the 
  southeastern 
  end 
  of 
  Loon 
  lake. 
  The 
  banded 
  and 
  jointed 
  character 
  of 
  

   the 
  rock 
  is 
  well 
  shown. 
  

  

  