﻿Plate 
  24 
  

  

  Upper 
  view. 
  Watertown 
  limestone 
  near 
  river 
  at 
  Watertown, 
  showing 
  

   seven 
  foot 
  tier 
  and 
  the 
  upper 
  portion 
  of 
  the 
  cherty 
  bed 
  beneath. 
  

  

  Lower 
  view. 
  Trenton 
  limestone 
  in 
  creek 
  bank 
  near 
  Threemile 
  Bay, 
  

   Clayton 
  quadrangle. 
  A 
  closer 
  and 
  more 
  detailed 
  view 
  of 
  part 
  of 
  the 
  sec- 
  

   tion 
  shown 
  in 
  plate 
  25. 
  E. 
  O. 
  Ulrich, 
  photo, 
  1908 
  

  

  