﻿Plate 
  2 
  

  

  Rochester 
  

   shale 
  

  

  Upper 
  limestone 
  

   (Irondequoit) 
  

  

  Upper 
  green 
  shale 
  

   (Williamson) 
  

  

  ! 
  Lower 
  limestone 
  

   (Wolcott) 
  

  

  Iron 
  ore. 
  (Furnace- 
  

   ville) 
  

  

  Lower 
  green 
  shale 
  

   (Sodus) 
  

  

  Medina 
  gray 
  band 
  

  

  • 
  Red 
  Medina 
  shales 
  

  

  Genesee 
  gorge, 
  Rochester, 
  showing 
  the 
  upper 
  

   Medina, 
  the 
  Clinton 
  beds 
  and 
  the 
  base 
  of 
  the 
  

   Rochester 
  shale 
  

  

  