﻿TABLE 
  OF 
  CONTENTS 
  

  

  PAGE. 
  

  

  Introductory 
  25, 
  26 
  

  

  Historical 
  27-29 
  

  

  Location, 
  etc 
  29-31 
  

  

  Portage 
  group 
  31-34 
  

  

  Genesee 
  shales 
  35-38 
  

  

  Tully 
  horizon 
  38-42 
  

  

  Hamilton 
  shales 
  42-45 
  

  

  Marcellus 
  shales 
  45, 
  46 
  

  

  Cornif 
  erous 
  limestone 
  , 
  . 
  46, 
  47 
  

  

  Oriskany 
  sandstone 
  47 
  

  

  Lower 
  Helderberg 
  group 
  47, 
  48 
  

  

  Salina 
  group 
  48-53 
  

  

  Salt 
  beds 
  bounded 
  53 
  

  

  Posit 
  on 
  of 
  Genesee 
  wells 
  53-56 
  

  

  Timbering, 
  etc 
  57-59 
  

  

  Descriptions 
  of 
  buildings, 
  etc 
  59, 
  GO 
  

  

  The 
  mines 
  and 
  the 
  process 
  60-63 
  

  

  