﻿Plate 
  I 
  6 
  

  

  Exposure 
  i^ 
  miles 
  east 
  of 
  Perch 
  lake, 
  of 
  limestones 
  of 
  the 
  lower 
  division 
  

   of 
  the 
  Pamelia 
  formation; 
  about 
  6 
  feet 
  of 
  black, 
  fossiliferous 
  limestone 
  

   above 
  and 
  twice 
  that 
  thickness 
  of 
  gray, 
  magnesian 
  limestones 
  beneath. 
  

   H. 
  P. 
  Gushing, 
  photo, 
  1907 
  

  

  