﻿Plate 
  7 
  

  

  Glacial 
  pebble 
  from 
  left 
  bank 
  of 
  Saranac 
  river 
  about 
  i 
  mile 
  above 
  Platts- 
  

  

  burg. 
  Taken 
  from 
  the 
  till 
  close 
  upon 
  the 
  glaciated 
  bed 
  rock. 
  It 
  shows 
  a 
  

  

  series 
  of 
  fine 
  parallel 
  striae 
  made 
  by 
  sand 
  grains 
  lying 
  between 
  it 
  and 
  the 
  

  

  bed 
  rock 
  and 
  the 
  usual 
  irregular 
  scratches 
  and 
  incisions 
  caused 
  by 
  rubbing 
  

   against 
  other 
  blocks 
  in 
  the 
  till. 
  

  

  