﻿CLASSIFICATION, 
  ETC. 
  OP 
  HAMILTON 
  AND 
  CHEMUNG 
  SERIES 
  105 
  

  

  the 
  characteristic 
  Chemung 
  species 
  Spirifer 
  disjunctus 
  Sowb. 
  was 
  

   f 
  ound 
  a 
  , 
  showing 
  conclusively 
  that 
  - 
  these 
  higher 
  rocks 
  are 
  of 
  

   Chemung 
  age. 
  

  

  DELAWARE 
  COUNTY 
  

  

  To 
  the 
  east 
  of 
  Broome 
  and 
  Chenango 
  counties 
  and 
  south 
  of 
  the 
  

   Susquehanna 
  valley 
  and 
  Otsego 
  county 
  is 
  Delaware 
  county 
  which 
  

   is 
  crossed 
  by 
  the 
  Delaware 
  river 
  from 
  the 
  northeast 
  to 
  the 
  south- 
  

   west. 
  The 
  geology 
  of 
  this 
  county 
  is 
  interesting 
  from 
  the 
  fact 
  

   that 
  as 
  the 
  Chemung 
  formation 
  is 
  followed 
  from 
  the 
  Susque- 
  

   hanna 
  valley 
  eastward 
  into 
  Delaware 
  county 
  it 
  thins 
  rapidly 
  from 
  

   the 
  upper 
  part 
  downwards, 
  being 
  replaced 
  by 
  rocks 
  consisting 
  of 
  

   coarse 
  grained 
  gray 
  sandstones, 
  alternating 
  with 
  red 
  sandstones 
  

   and 
  red 
  and 
  greenish 
  argillaceous 
  shales 
  similar 
  to 
  those 
  found 
  

   in 
  the 
  Catskill 
  formation 
  in 
  the 
  Catskill 
  mountains. 
  This 
  change 
  

   In 
  lithologic 
  characters 
  is 
  found 
  to 
  have 
  occurred 
  quite 
  rapidly, 
  

   for 
  on 
  passing 
  to 
  the 
  east 
  of 
  the 
  Delaware 
  river 
  in 
  the 
  vicinity 
  of 
  

   Delhi 
  we 
  see 
  that 
  the 
  characters 
  of 
  the 
  Catskill 
  rocks 
  have 
  nearly 
  

   replaced 
  those 
  of 
  the 
  Chemung; 
  the 
  replacement 
  being 
  from 
  the 
  

   top 
  and 
  the 
  lower 
  part 
  of 
  the 
  Chemung 
  extending 
  farthest 
  to 
  the 
  

   east. 
  However, 
  after 
  crossing 
  the 
  Delaware 
  river 
  it 
  is 
  difficult 
  to 
  

   recognize 
  the 
  Chemung 
  formation 
  and 
  in 
  the 
  eastern 
  part 
  of 
  the 
  

   county 
  there 
  is 
  a 
  section 
  of 
  red 
  and 
  gray 
  sandstones 
  alternating 
  

   with 
  red 
  and 
  greenish 
  shales 
  from 
  the 
  base 
  of 
  the 
  Oneonta 
  sand- 
  

   stone 
  to 
  the 
  tops 
  of 
  the 
  highest 
  hills 
  which 
  are 
  clearly 
  in 
  the 
  

   typical 
  Catskill 
  formation. 
  

  

  Masonville 
  

  

  To 
  the 
  east 
  of 
  Afton 
  and 
  Bainbridge 
  is 
  Masonville 
  which 
  is 
  

   one 
  of 
  the 
  western 
  tier 
  of 
  townships 
  in 
  Delaware 
  county. 
  The 
  

   northern 
  central 
  part 
  of 
  the 
  township 
  is 
  crossed 
  from 
  the 
  east 
  to 
  

   the 
  west 
  by 
  Bennett's 
  creek 
  which 
  heads 
  partly 
  in 
  the 
  small 
  

   glacial 
  lake 
  east 
  of 
  East 
  Masonville 
  near 
  the 
  township 
  line 
  be- 
  

   tween 
  Masonville 
  and 
  Sidney. 
  Exposures 
  on 
  the 
  banks 
  of 
  this 
  

   creek 
  below 
  Bennettsville, 
  in 
  the 
  southeastern 
  part 
  of 
  Bainbridge 
  

  

  cloth 
  an. 
  rep't 
  N. 
  Y. 
  state 
  geologist, 
  p. 
  160. 
  

  

  