﻿230 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  Geological 
  Survey, 
  says 
  "are 
  so 
  small 
  that 
  they 
  measure 
  no 
  more 
  

   than 
  1-| 
  to 
  2 
  mm 
  , 
  and 
  so 
  abundant 
  that 
  I 
  have 
  estimated 
  from 
  good 
  

   specimens 
  of 
  the 
  limestone 
  at 
  least 
  40,000 
  individuals 
  to 
  a 
  cubic 
  

   inch 
  of 
  the 
  rock." 
  

  

  Plant 
  remains 
  are 
  also 
  very 
  abundant, 
  also 
  Lunulicardium 
  

   fragilis 
  and 
  several 
  species 
  of 
  goniatites 
  and 
  orthoceratites, 
  which 
  

   are 
  frequently 
  silicified 
  and 
  attract 
  attention 
  from 
  being 
  so 
  white 
  

   in 
  the 
  dark 
  rock. 
  Sections 
  of 
  the 
  stems 
  of 
  the 
  beautiful 
  crinoid 
  

   Melocrinus 
  GlarJcii, 
  Williams, 
  are 
  seen 
  at 
  nearly 
  every 
  exposure, 
  

   and 
  more 
  rarely 
  sections 
  of 
  a 
  smaller 
  one, 
  probably 
  a 
  variety 
  of 
  

   M. 
  Clarkii. 
  

  

  A 
  full 
  description 
  of 
  this 
  exceedingly 
  interesting 
  band 
  may 
  be 
  

   found 
  in 
  Bulletin 
  16, 
  II. 
  S. 
  Geological 
  Survey, 
  by 
  J. 
  M. 
  Clarke. 
  

  

  Toward 
  the 
  west 
  the 
  intercalated 
  shales 
  thin 
  out 
  and 
  the 
  lime- 
  

   stone 
  layers 
  are 
  consolidated 
  into 
  two 
  or 
  three 
  much 
  thicker 
  ones. 
  

   At 
  Darien 
  the 
  band 
  shows 
  only 
  as 
  a 
  compact 
  layer 
  of 
  concretions, 
  

   with 
  a 
  few 
  inches 
  of 
  the 
  calcareous 
  shale 
  overlying 
  it. 
  

  

  Good 
  exposures 
  of 
  the 
  Styliola 
  band 
  may 
  be 
  seen 
  in 
  the 
  lowest 
  

   rock 
  uncovered 
  in 
  the 
  Foster 
  gully, 
  Middlesex 
  valley, 
  Yates 
  

   county, 
  and 
  along 
  the 
  east 
  side 
  of 
  Cananclaigua 
  lake 
  from 
  Genun- 
  

   dawah 
  Point 
  north 
  one 
  and 
  one 
  half 
  miles. 
  In 
  the 
  Seneca 
  Point 
  

   gully, 
  on 
  the 
  west 
  side 
  of 
  the 
  lake, 
  it 
  forms 
  the 
  crest 
  of 
  the 
  falls, 
  

   and 
  is 
  finely 
  exposed. 
  It 
  may 
  be 
  seen 
  at 
  Bristol 
  Centre, 
  Ontario 
  

   county, 
  near 
  the 
  mouth 
  of 
  the 
  ravine 
  east 
  of 
  the 
  village, 
  and 
  

   also 
  in 
  the 
  smaller 
  ravine 
  on 
  the 
  west 
  side 
  of 
  the 
  valley. 
  

  

  It 
  is 
  the 
  lowest 
  rock 
  exposed 
  in 
  " 
  Mill 
  Gull," 
  east 
  of 
  Honeoye, 
  

   where 
  the 
  principal 
  layer 
  is 
  seen 
  to 
  excellent 
  advantage, 
  as 
  it 
  

   makes 
  a 
  floor 
  averaging 
  ten 
  to 
  twelve 
  feet 
  wide 
  and 
  several 
  rods 
  

   long, 
  with 
  the 
  characteristic 
  features 
  well 
  developed, 
  and 
  show- 
  

   ing 
  many 
  fossils, 
  some 
  of 
  them 
  silicified. 
  It 
  is 
  also 
  exposed 
  in 
  

   one 
  or 
  two 
  small 
  ravines 
  further 
  north. 
  In 
  the 
  ravines 
  on 
  the 
  

   east 
  side 
  of 
  Hemlock 
  Lake 
  valley, 
  opposite 
  and 
  a 
  little 
  north 
  of 
  

   the 
  village 
  of 
  Hemlock 
  Lake, 
  and 
  in 
  the 
  Reed 
  gully, 
  the 
  band 
  is 
  

   well 
  exposed. 
  

  

  In 
  1893 
  the 
  city 
  of 
  Rochester 
  drove 
  a 
  tunnel 
  from 
  Hemlock 
  

   lake 
  to 
  a 
  point 
  opposite 
  this 
  village 
  — 
  about 
  6,000 
  feet 
  — 
  for 
  the 
  

   purpose 
  of 
  conveying 
  the 
  water 
  of 
  the 
  lake 
  to 
  the 
  city. 
  

  

  Shafts 
  about 
  twelve 
  feet 
  square 
  and 
  fifty 
  to 
  eighty 
  feet 
  deep 
  

   were 
  sunk 
  1,000 
  feet 
  apart. 
  

  

  