﻿GEOLOGICAL 
  SURVEY 
  OF 
  THE 
  STATE 
  OF 
  NEW 
  YORK. 
  

  

  (GEOLOGICAL 
  MAP.) 
  

  

  Report 
  on 
  Field-work 
  in 
  Chenango 
  Connty. 
  

  

  By 
  J. 
  M. 
  CLARKE. 
  

  

  Prof. 
  James 
  Hall, 
  State 
  Geologist 
  : 
  

  

  Sir. 
  — 
  The 
  report 
  which 
  I 
  am 
  able 
  to 
  make 
  of 
  my 
  field 
  explora- 
  

   tions 
  during 
  the 
  month 
  of 
  September, 
  1893, 
  in 
  Chenango 
  county 
  

   will 
  of 
  necessity 
  be 
  'brief 
  and 
  incomplete. 
  Starting 
  into, 
  the 
  

   field 
  with 
  the 
  hope 
  of 
  accomplishing 
  a 
  given 
  amount 
  of 
  work 
  

   within 
  a 
  specified 
  time 
  it 
  was 
  my 
  misfortune 
  to 
  have 
  both 
  ele- 
  

   ments 
  in 
  the 
  plan 
  miscarry, 
  first 
  on 
  account 
  of 
  the 
  advent 
  of 
  

   protracted 
  rainy 
  weather 
  and 
  second 
  from 
  the 
  demands 
  of 
  

   prior 
  duties 
  at 
  the 
  Albany 
  office. 
  

  

  This 
  work 
  was 
  undertaken 
  with 
  the 
  purpose 
  of 
  acquiring 
  

   further 
  evidence 
  as 
  to 
  the 
  relation 
  of 
  the 
  Oneonta 
  sandstone 
  and 
  

   shales 
  to 
  the 
  underlying 
  rocks, 
  the 
  nature 
  of 
  the 
  fauna 
  of 
  these 
  

   rocks, 
  the 
  western 
  continuation 
  of 
  the 
  red 
  and 
  grey 
  sandstones 
  or 
  

   red 
  and 
  green 
  shales 
  of 
  the 
  Oneonta, 
  from 
  their 
  typical 
  exposures 
  

   in 
  Otsego 
  county 
  and 
  the 
  determination 
  of 
  the 
  easternmost 
  

   appearance 
  of 
  the 
  typical 
  marine 
  Portage 
  fauna. 
  Concerning 
  

   the 
  first 
  two 
  of 
  these 
  points 
  the 
  information 
  acquired 
  is 
  here 
  

   duly 
  set 
  forth, 
  but 
  the 
  last 
  is 
  a 
  matter 
  still 
  to 
  be 
  determined. 
  

  

  Without 
  entering 
  into 
  the 
  history 
  of 
  the 
  discussions 
  pertaining 
  

   to 
  the 
  position 
  of 
  the 
  Oneonta 
  shales 
  and 
  sandstones 
  (Yanuxem) 
  

   in 
  the 
  New 
  York 
  series 
  it 
  may 
  be 
  stated 
  that 
  it 
  has 
  of 
  late 
  years 
  

   been 
  regarded 
  as 
  resting 
  upon 
  rocks 
  containing 
  a 
  Hamilton 
  

   fauna 
  (a 
  determination 
  of 
  unquestionable 
  accuracy) 
  and 
  hence 
  as 
  

   representing 
  an 
  eastward 
  extension 
  of 
  the 
  Portage 
  group 
  of 
  

   western 
  New 
  York. 
  

  

  