﻿Report 
  of 
  the 
  State 
  Geologist. 
  231 
  

  

  Shafts 
  Nos. 
  3, 
  4 
  and 
  5 
  penetrate 
  the 
  Styliola 
  band, 
  and 
  the 
  

   limestones 
  were 
  also 
  encountered 
  in 
  the 
  tunnel, 
  which 
  has 
  an 
  

   inclination 
  of 
  1 
  : 
  4,000, 
  for 
  a 
  distance 
  of 
  several 
  hundred 
  feet. 
  

  

  The 
  only 
  exposure 
  of 
  this 
  horizon 
  in 
  the 
  Conesus 
  Lake 
  valley 
  

   is 
  in 
  the 
  ravine 
  back 
  of 
  Eagle 
  Point, 
  where 
  it 
  makes 
  a 
  low 
  fall 
  in 
  

   the 
  stream. 
  

  

  The 
  bottom 
  of 
  the 
  lowest 
  layer 
  is 
  forty-nine 
  feet 
  above 
  the 
  

   lake. 
  

  

  In 
  the 
  Genesee 
  valley 
  the 
  main 
  layer 
  forms 
  the 
  brink 
  of 
  the 
  

   falls 
  at 
  Fall 
  Brook, 
  near 
  Geneseo, 
  where 
  it 
  measures 
  fourteen 
  

   inches 
  in 
  thickness 
  and 
  is 
  very 
  compact. 
  Blocks 
  of 
  it, 
  some 
  of 
  

   them 
  ten 
  to 
  twelve 
  feet 
  across, 
  have 
  fallen 
  down 
  and 
  are 
  seen 
  

   in 
  large 
  numbers. 
  It 
  also 
  forms 
  the 
  brink 
  of 
  the 
  fall 
  near 
  

   Moscow, 
  on 
  the 
  west 
  branch 
  of 
  Beard's 
  creek, 
  where 
  it 
  was 
  

   quarried 
  by 
  the 
  D. 
  L. 
  & 
  "W. 
  R. 
  R. 
  Co., 
  to 
  be 
  used 
  in 
  building 
  

   culverts; 
  and 
  the 
  fall 
  in 
  the 
  ravine 
  one 
  mile 
  south 
  of 
  South 
  

   Greigsville. 
  

  

  It 
  is 
  also 
  exposed 
  on 
  Fall 
  Brook, 
  south 
  of 
  Geneseo 
  on 
  the 
  road 
  

   leading 
  from 
  Geneseo 
  to 
  Mt. 
  Morris, 
  and 
  in 
  several 
  ravines 
  

   between 
  Moscow 
  and 
  Greigsville, 
  and 
  it 
  is 
  said 
  to 
  be 
  the 
  founda- 
  

   tion 
  for 
  the 
  dam 
  across 
  the 
  Genesee 
  river 
  at 
  Mt. 
  Morris.* 
  

  

  It 
  is 
  well 
  developed 
  and 
  exposed 
  in 
  a 
  ravine 
  one 
  and 
  one-half 
  

   miles 
  southwest 
  of 
  the 
  village 
  of 
  Pavilion, 
  west 
  of 
  the 
  old 
  mill, 
  

   where 
  it 
  forms 
  the 
  brink 
  of 
  a 
  fall 
  eighteen 
  feet 
  high. 
  This 
  is 
  the 
  

   only 
  exposure 
  of 
  this 
  horizon 
  observed 
  in 
  the 
  Oatka 
  valley, 
  the 
  

   amount 
  of 
  drift 
  being 
  larger 
  and 
  the 
  hills 
  not 
  steep. 
  

  

  At 
  Griswold's, 
  the 
  first 
  station 
  west 
  of 
  Attica 
  on 
  the 
  Erie 
  

   railroad, 
  in 
  the 
  bed 
  of 
  Murder 
  creek, 
  just 
  above 
  the 
  station, 
  it 
  has 
  

   the 
  nodular 
  layer 
  more 
  strongly 
  developed, 
  about 
  eight 
  inches 
  

   thick 
  with 
  four 
  inches 
  of 
  shaly 
  limestone 
  overlying 
  it, 
  making 
  in 
  

   all 
  about 
  twelve 
  inches. 
  

  

  In 
  the 
  bed 
  of 
  the 
  creek 
  one 
  and 
  one-half 
  miles 
  west 
  of 
  Darien 
  

   Centre, 
  a 
  short 
  distance 
  below 
  the 
  Erie 
  track, 
  it 
  appears 
  as 
  a 
  

   four 
  inch 
  layer 
  of 
  nodular 
  limestone, 
  separated 
  by 
  one 
  foot 
  of 
  

   black 
  shale 
  from 
  a 
  compact 
  layer 
  of 
  spherical 
  concretions 
  below. 
  

  

  This 
  exposure, 
  the 
  most 
  westerly 
  one 
  examined, 
  is 
  long 
  and 
  

   flat, 
  a 
  very 
  difficult 
  one 
  from 
  which 
  to 
  obtain 
  correct 
  measure- 
  

  

  *Mr. 
  C. 
  Cocher 
  of 
  Greigsville 
  is 
  authority 
  for 
  this 
  statement. 
  

  

  