﻿236 
  Forty- 
  seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  near 
  the 
  Delaware, 
  Lackawanna 
  and 
  Western 
  railroad, 
  between 
  

   Moscow 
  and 
  South 
  Greigsville. 
  

  

  About 
  thirty-iive 
  rods 
  west 
  of 
  the 
  Greigsville 
  salt 
  shaft 
  it 
  was 
  

   exposed 
  in 
  a 
  shallow 
  excavation 
  made 
  in 
  connection 
  with 
  the 
  

   water 
  supply, 
  and 
  was 
  about 
  four 
  inches 
  thick 
  and 
  twenty 
  feet 
  

   higher 
  than 
  the 
  mouth 
  of 
  that 
  shaft. 
  

  

  The 
  horizon 
  is 
  covered 
  with 
  drift 
  in 
  the 
  Oatka 
  valley, 
  the 
  next 
  

   westward 
  exposure 
  observed 
  being 
  at 
  Griswold's, 
  a 
  station 
  on 
  

   the 
  Erie 
  railroad 
  about 
  fifteen 
  miles 
  west 
  of 
  the 
  Oatka 
  river, 
  

   where 
  a 
  patch 
  one 
  and 
  one-quarter 
  inches 
  thick 
  is 
  exposed. 
  

  

  The 
  top 
  of 
  the 
  Hamilton 
  group 
  was 
  reached 
  at 
  the 
  depth 
  of 
  

   280 
  feet 
  in 
  the 
  Livonia 
  shaft. 
  The 
  shales 
  immediately 
  beneath 
  

   the 
  pyrites 
  layer 
  are 
  quite 
  dark, 
  though 
  differing 
  greatly 
  from 
  

   the 
  black 
  shales 
  above. 
  

  

  The 
  color 
  is 
  lighter 
  as 
  the 
  depth 
  increases, 
  and 
  at 
  286 
  feet 
  the 
  

   soft, 
  light-colored 
  blue-gray 
  calcareous 
  "Moscow 
  shale" 
  was 
  

   reached. 
  This 
  bed 
  is 
  thirty-five 
  feet 
  thick, 
  and 
  here, 
  as 
  every- 
  

   where 
  in 
  Western 
  New 
  York, 
  it 
  is 
  exceedingly 
  rich 
  in 
  fossils 
  and 
  

   contains 
  much 
  iron 
  pyrites. 
  Concretions 
  are 
  numerous 
  and 
  

   usually 
  contain 
  fossils 
  in 
  an 
  excellent 
  state 
  of 
  preservation. 
  

  

  A 
  persistent 
  concretionary 
  layer 
  of 
  impure 
  limestone 
  about 
  

   twelve 
  feet 
  below 
  the 
  top 
  of 
  the 
  Hamilton 
  group, 
  exposed 
  along 
  

   Little 
  Beard's 
  creek, 
  near 
  Moscow, 
  Livingston 
  county, 
  has 
  

   sometimes 
  been 
  identified 
  as 
  the 
  Tully 
  limestone. 
  This 
  is 
  

   a 
  mistake. 
  A 
  careful 
  examination 
  of 
  the 
  overlying 
  shales 
  

   will 
  show 
  great 
  numbers 
  of 
  characteristic 
  Hamilton 
  fossils, 
  and 
  

   in 
  many 
  places 
  the 
  non-persistent 
  pyrites 
  layers 
  in 
  the 
  horizon 
  of 
  

   the 
  Tully 
  limestone. 
  These 
  Moscow 
  shales 
  are 
  finely 
  exposed 
  

   along 
  the 
  . 
  shores 
  of 
  Canandaigua 
  lake 
  and 
  in 
  the 
  ravines 
  at 
  

   Tichenor's 
  point, 
  Menteth's 
  point, 
  Foster's 
  point 
  and 
  Gage's 
  

   landing; 
  also 
  at 
  Richmond 
  Mills, 
  in 
  the 
  western 
  part 
  of 
  

   Ontario 
  county. 
  In 
  Livingston 
  county, 
  Fall 
  Brook 
  ravine, 
  near 
  

   Geneseo, 
  and 
  Little 
  Beard's 
  creek, 
  on 
  the 
  west 
  side 
  of 
  the 
  Gen- 
  

   esee 
  valley, 
  are 
  famous 
  exposures 
  of 
  this 
  horizon, 
  and 
  for 
  ten 
  

   miles 
  north 
  of 
  the 
  village 
  of 
  Moscow, 
  along 
  the 
  Delaware, 
  Lack- 
  

   awanna 
  and 
  Western 
  railroad, 
  good 
  outcrops 
  occur 
  in 
  the 
  ravines 
  

   and 
  creek 
  beds. 
  

  

  It 
  is 
  slightly 
  exposed 
  in 
  the 
  vicinity 
  of 
  Pavilion, 
  in 
  the 
  Oatka 
  

   valley, 
  but 
  the 
  drift 
  is 
  too 
  deep 
  arid 
  the 
  valley 
  too 
  shallow 
  to 
  

   allow 
  good 
  exposures. 
  

  

  