﻿Report 
  of 
  the 
  State 
  Geologist. 
  257 
  

  

  limestones 
  of 
  the 
  Styliola 
  band 
  of 
  the 
  Genesee 
  group, 
  the 
  posi- 
  

   tion 
  of 
  the 
  band 
  was 
  found 
  to 
  be 
  approximately 
  190 
  feet 
  below 
  

   the 
  surface 
  in 
  the 
  shaft. 
  

  

  At 
  the 
  falls 
  in 
  Fall 
  Brook 
  glen, 
  near 
  Geneseo, 
  the 
  top 
  of 
  the 
  

   Styliola 
  band 
  is 
  eighty-three 
  feet 
  above 
  the 
  thin 
  layer 
  of 
  iron 
  

   pyrites 
  which 
  separates 
  the 
  Genesee 
  and 
  Hamilton 
  groups, 
  while 
  

   on 
  Canandaigua 
  lake 
  it 
  is 
  about 
  llo 
  feet 
  above 
  it. 
  

  

  Ninety 
  feet 
  is 
  assumed, 
  therefore, 
  as 
  the 
  thickness 
  of 
  the 
  rock 
  

   between 
  the 
  Styliola 
  band 
  and 
  the 
  top 
  of 
  the 
  Hamilton 
  group 
  in 
  

   the 
  shaft 
  and 
  280 
  feet 
  as 
  the 
  depth 
  at 
  which 
  the 
  Hamilton 
  group 
  

   was 
  reached. 
  

  

  The 
  diagram 
  of 
  the 
  rock 
  section 
  in 
  the 
  Eetsof 
  shaft 
  was 
  pre- 
  

   pared 
  from 
  the 
  record 
  mentioned, 
  with 
  some 
  slight 
  changes 
  

   which 
  examinations 
  of 
  outcrops 
  in 
  the 
  vicinity 
  and 
  information 
  

   obtained 
  at 
  the 
  Greigsville 
  shaft 
  appeared 
  to 
  make 
  proper. 
  

  

  The 
  Retsof 
  shaft 
  at 
  the 
  surface 
  is 
  about 
  ninety 
  feet 
  lower 
  than 
  

   -the 
  Greigsville 
  shaft, 
  and 
  110 
  feet 
  below 
  the 
  top 
  of 
  the 
  Hamilton 
  

   group, 
  as 
  was 
  shown 
  by 
  the 
  exposure 
  of 
  the 
  pyrites 
  layer, 
  here 
  

   four 
  inches 
  thick, 
  and 
  the 
  upper 
  layers 
  of 
  the 
  Moscow 
  shale, 
  in 
  

   a 
  shallow 
  excavation 
  a 
  short 
  distance 
  west 
  of 
  the 
  Greigsville 
  

   shaft 
  and 
  about 
  twenty 
  feet 
  higher 
  than 
  its 
  mouth. 
  

  

  The 
  limestone 
  in 
  which 
  it 
  begun 
  is 
  one 
  of 
  several 
  which 
  occur 
  

   in 
  about 
  this 
  horizon, 
  and 
  is 
  not 
  the 
  limestone 
  of 
  the 
  encrinal 
  

   band, 
  as 
  that 
  was 
  reached 
  at 
  a 
  depth 
  of 
  133 
  feet. 
  

  

  In 
  the 
  preparations 
  of 
  the 
  diagrams, 
  showing 
  the 
  relative 
  posi- 
  

   [tion 
  of 
  the 
  wells 
  in 
  the 
  Genesee 
  and 
  Oatka 
  valleys, 
  the 
  well 
  

   [records, 
  as 
  published 
  in 
  the 
  reports 
  of 
  Prof. 
  I. 
  P. 
  Bishop, 
  Dr. 
  

   [Englehart 
  and 
  Prof. 
  Merrill, 
  have 
  been 
  used. 
  

  

  The 
  facts 
  given 
  in 
  regard 
  to 
  the 
  geological 
  position 
  of 
  the 
  

  

  [mouths 
  of 
  wells 
  were 
  ascertained 
  by 
  several 
  weeks' 
  study 
  of 
  the 
  

  

  [many 
  exposures 
  in 
  the 
  ravines 
  through 
  which 
  the 
  little 
  streams 
  

  

  which 
  le^d 
  into 
  the 
  Genesee 
  or 
  Oatka 
  rivers 
  have 
  cut 
  their 
  way. 
  

  

  I 
  As 
  the 
  Livonia 
  shaft, 
  a 
  majority 
  of 
  the 
  wells 
  in 
  which 
  rock 
  salt 
  

  

  fhas 
  been 
  reached 
  in 
  the 
  Warsaw 
  district, 
  and 
  the 
  wells 
  at 
  Attica, 
  

  

  Castile, 
  Perry, 
  Nunda, 
  Dansville, 
  Naples 
  and 
  Dundee 
  are 
  all 
  

  

  located 
  on 
  rocks 
  of 
  the 
  Portage 
  group, 
  three 
  sections 
  have 
  been 
  

  

  >repared 
  which 
  show 
  the 
  strata 
  as 
  they 
  are 
  exposed 
  in 
  Yates, 
  

  

  Ontario, 
  Livingston 
  and 
  Wyoming 
  counties. 
  

  

  33 
  

  

  