﻿Plate 
  10 
  

  

  Upper 
  view. 
  Contact 
  of 
  Potsdam 
  sandstone 
  on 
  Grenville 
  limestone 
  just 
  

   north 
  of 
  lower 
  bridge 
  at 
  Theresa, 
  near 
  the 
  point 
  at 
  which 
  plate 
  ii 
  was 
  

   taken. 
  The 
  Potsdam 
  base 
  rests 
  against 
  the 
  side 
  of 
  a 
  limestone 
  hill, 
  and 
  

   the 
  boy 
  is 
  seated 
  on 
  the 
  limestone, 
  with 
  his 
  hand 
  resting 
  on 
  a 
  portion 
  of 
  

   the 
  Potsdam 
  base 
  from 
  which 
  the 
  limestone 
  has 
  been 
  removed. 
  

  

  Lower 
  view. 
  Nearer 
  view 
  of 
  a 
  portion 
  of 
  plate 
  9 
  showing 
  the 
  rotted 
  

   limestone 
  and 
  the 
  portion 
  of 
  the 
  Potsdam 
  base 
  which 
  projects 
  out 
  beyond 
  

   it 
  owing 
  to 
  removal 
  of 
  the 
  limestone. 
  H. 
  N. 
  Eaton, 
  photo, 
  1908 
  

  

  