﻿286 
  

  

  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  1135' 
  

  

  1138' 
  

  

  3' 
  Reddish-brown 
  limestone 
  with 
  dark 
  gypsum 
  in 
  nodular 
  

   layers. 
  

  

  45' 
  Gypsum 
  bed. 
  Dark 
  bluish- 
  gray 
  marly 
  te, 
  medium 
  

   hard, 
  with 
  softer, 
  shaly 
  layers. 
  

  

  After 
  exposure 
  the 
  rock 
  becomes 
  very 
  light 
  brownish-gray. 
  

   It 
  contains 
  much 
  gypsum 
  in 
  nodules, 
  and 
  in 
  nodular 
  layers, 
  

   which 
  are 
  somtimes 
  1' 
  or 
  more 
  thick. 
  Lines 
  of 
  deposition 
  are 
  

   not 
  apparent 
  in 
  the 
  rock 
  when 
  fresh, 
  but 
  exposure 
  produces 
  

   many 
  shades 
  from 
  brown 
  to 
  nearly 
  white, 
  as 
  the 
  proportion 
  

   of 
  gypsum 
  varies 
  in 
  the 
  layers, 
  giving 
  the 
  rock 
  a 
  beautifully 
  

   laminated 
  appearance. 
  

  

  