﻿278 
  

  

  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  888' 
  

  

  64' 
  Gray 
  limestone 
  as 
  above, 
  with 
  fossils 
  of 
  the 
  same 
  

   species, 
  but 
  less 
  abundant. 
  At 
  945' 
  many 
  large 
  specimens 
  of 
  

   Atrypa 
  reticularis 
  occur 
  in 
  a 
  thin 
  Jayer. 
  Chert, 
  varying 
  in 
  

   color 
  f 
  ronflight 
  blue'to 
  black, 
  occurs 
  in 
  nodules, 
  and 
  in 
  layers 
  

   from 
  Y 
  to 
  4" 
  thick 
  Between 
  888 
  and 
  916 
  there 
  is 
  much 
  

   chert, 
  from 
  916 
  to 
  930 
  it 
  decreases 
  in 
  quantity, 
  and 
  from 
  930 
  

   to 
  952 
  it 
  was 
  .found 
  only 
  in 
  a 
  very 
  few 
  thin 
  seams 
  and 
  small 
  

   nodules. 
  At 
  945' 
  a 
  3" 
  layer 
  of 
  very 
  dark 
  limestone 
  contained 
  

   black 
  chert 
  and 
  considerable 
  pyrite. 
  

  

  