﻿Report 
  of 
  the 
  State 
  Geologist. 
  

  

  271 
  

  

  4" 
  Dark 
  gray 
  limestone 
  composed, 
  mainly, 
  of 
  small 
  crinoid 
  

   stems. 
  

  

  22' 
  Gray 
  limestone 
  in 
  layers 
  from 
  4" 
  to 
  2' 
  in 
  thickness, 
  with 
  

   thin 
  shaly 
  partings, 
  with 
  layers 
  and 
  nodules 
  of 
  chert 
  unevenly 
  

   distributed. 
  Frorii 
  866 
  to 
  872 
  and 
  from 
  880 
  to 
  888 
  the 
  

   chert 
  was 
  small, 
  while 
  between 
  872 
  and 
  880 
  it 
  was 
  nearly 
  

   equal 
  to 
  the 
  limestone. 
  Fossils 
  moderately 
  abundant 
  in 
  the 
  

   limestone, 
  rare 
  in 
  the 
  chert. 
  The 
  following 
  is 
  a 
  list 
  of 
  the 
  

   more 
  prominent 
  species. 
  

  

  Phacopspipa, 
  Odontocephalus 
  selenurus, 
  Atrypa 
  reticularis, 
  

  

  Coelospira 
  Camilla, 
  Choneles 
  lineata, 
  Leptcena 
  rhomb 
  oidalis, 
  

  

  Amboccelia 
  umbonata, 
  Strophodonta 
  inazquistriata, 
  S. 
  per- 
  

  

  plana, 
  Orthothetes 
  Pandora, 
  Orthis 
  lenticularis, 
  Athyris 
  

  

  spiriferoides, 
  Spirifer 
  fimbriatus, 
  Sp. 
  duodenarius, 
  Platyceras 
  

  

  887' 
  8" 
  

  

  14' 
  Light 
  brownish 
  gray 
  layer, 
  very 
  soft, 
  shaly, 
  crumbling 
  quickly 
  on 
  

   exposure, 
  gypseous 
  though 
  apparently 
  micaceous, 
  with 
  the 
  same 
  fossils 
  

   abundant 
  in 
  the 
  upper 
  part 
  as 
  occur 
  in 
  the 
  limestone, 
  the 
  rest 
  of 
  the 
  

   layer 
  non-f 
  ossilif 
  erous. 
  In 
  contact, 
  above, 
  is 
  a 
  thin 
  shaly 
  layer 
  of 
  lime- 
  

   stone 
  with 
  crinoid 
  stems 
  and 
  maDy 
  other 
  fossils. 
  The 
  layer 
  rests 
  on 
  a 
  

  

  very 
  cherty 
  layer 
  of 
  hard 
  limestone. 
  

  

  