﻿238 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  The 
  hard, 
  calcareous 
  shales 
  which 
  lie 
  immediately 
  above 
  an 
  . 
  

   below 
  the 
  limestone, 
  and 
  with 
  it 
  constitute 
  the 
  " 
  encrinal 
  band," 
  

   were 
  filled 
  with 
  fossils. 
  Corals 
  were 
  more 
  abundant 
  than 
  at 
  the 
  

   exposure 
  of 
  this 
  horizon 
  near 
  the 
  mouth 
  of 
  Tichenor's 
  glen, 
  

   Canandaigua 
  lake. 
  

  

  The 
  exposures 
  of 
  the 
  encrinal 
  band 
  in 
  the 
  Genesee 
  valley 
  were 
  

   not 
  examined 
  by 
  me 
  in 
  a 
  ravine, 
  but 
  on 
  Mr. 
  C. 
  J. 
  Hill's 
  farm, 
  in 
  

   the 
  town 
  of 
  Pavilion, 
  near 
  Linwood, 
  on 
  the 
  Delaware, 
  Lacka- 
  

   wanna 
  and 
  Western 
  railroad. 
  The 
  limestones 
  and 
  shales 
  are 
  

   well 
  exposed, 
  and 
  one 
  and 
  one-half 
  miles 
  west 
  of 
  East 
  Bethany, 
  

   on 
  the 
  same 
  railroad, 
  there 
  is 
  a 
  rock 
  cut 
  sixty 
  to 
  eighty 
  rods 
  

   long 
  in 
  this 
  horizon, 
  where 
  the 
  disintegrating 
  shale 
  has 
  left 
  

   thousands 
  of 
  beautiful 
  corals 
  and 
  other 
  fossils 
  lying 
  on 
  the 
  

   surface 
  of 
  the 
  ground. 
  

  

  The 
  bed 
  of 
  soft 
  shale 
  below 
  the 
  encrinal 
  band, 
  known 
  as 
  the 
  

   Ludlowville 
  shales, 
  was 
  233 
  feet 
  thick 
  at 
  Livonia. 
  The 
  principal 
  

   part 
  of 
  it 
  is 
  light 
  bluish-gray 
  in 
  color, 
  and 
  thin 
  layers 
  of 
  dark 
  

   brown, 
  slightly 
  bituminous 
  shale 
  are 
  intercalated 
  at 
  irregular 
  

   intervals. 
  Joints 
  are 
  numerous. 
  Concretions 
  are 
  rare. 
  It 
  is 
  

   generally 
  quite 
  barren 
  of 
  fossils, 
  though 
  a 
  few 
  horizons 
  afford 
  

   good 
  specimens. 
  It 
  is 
  exposed 
  along 
  the 
  Conesus 
  outlet 
  near 
  

   Avon, 
  and 
  in 
  the 
  banks 
  of 
  the 
  Oatka 
  river 
  between 
  Le 
  Eoy 
  and 
  

   the 
  Delaware, 
  Lackawanna 
  and 
  Western 
  Junction. 
  

  

  The 
  total 
  thickness 
  of 
  the 
  strata 
  belonging 
  to 
  the 
  Hamilton 
  

   group 
  passed 
  through 
  in 
  sinking 
  the 
  Livonia 
  salt 
  shaft 
  was 
  517 
  

   feet. 
  

  

  The 
  Greigsville 
  shaft 
  was 
  begun 
  in 
  the 
  Moscow 
  shales 
  

   about 
  twenty 
  feet 
  below 
  the 
  top 
  of 
  the 
  Hamilton 
  and 
  sunk 
  

   through 
  431 
  feet 
  of 
  that 
  group. 
  The 
  Eetsof 
  shaft 
  was 
  begun 
  

   about 
  110 
  feet 
  below 
  the 
  top 
  of 
  the 
  Hamilton 
  group 
  and 
  reached 
  

   the 
  Marcellus 
  shales 
  at 
  the 
  depth 
  of 
  347 
  feet, 
  showing 
  the 
  Hamil- 
  

   ton 
  group 
  to 
  be 
  457 
  feet 
  thick 
  at 
  that 
  point. 
  

  

  The 
  mouth 
  of 
  the 
  salt 
  well 
  at 
  Pavilion 
  is, 
  as 
  nearly 
  as 
  could 
  be 
  

   ascertained 
  without 
  the 
  use 
  of 
  a 
  level, 
  in 
  the 
  horizon 
  of 
  the 
  top 
  of 
  

   the 
  Hamilton. 
  The 
  Corniferous 
  limestone 
  was 
  reached 
  at 
  the 
  

   depth 
  of 
  415 
  feet, 
  according 
  to 
  the 
  record. 
  Allowing 
  sixty 
  feet 
  

   for 
  the 
  Marcellus, 
  would 
  leave 
  365 
  feet 
  as 
  the 
  thickness 
  of 
  the 
  

   Hamilton 
  group 
  at 
  the 
  Pavilion 
  well. 
  Prof. 
  Bishop's 
  record 
  of 
  

  

  