﻿INTRODUCTION 
  

  

  In 
  the 
  summer 
  of 
  1895 
  the 
  formations 
  of 
  the 
  Hamilton 
  and 
  

   Chemung 
  series 
  were 
  studied 
  in 
  the 
  field 
  from 
  the 
  Chenango 
  valley 
  

   region 
  eastward 
  to 
  the 
  southern 
  part 
  of 
  Albany 
  and 
  the 
  northern 
  

   part 
  of 
  Greene 
  counties. 
  The 
  geology 
  of 
  this 
  region 
  from 
  the 
  

   Chenango 
  valley 
  to 
  the 
  eastern 
  part 
  of 
  Otsego 
  co. 
  is 
  described 
  

   by 
  the 
  writer 
  in 
  the 
  loth 
  Annual 
  report 
  of 
  the 
  state 
  geologist.® 
  This 
  

   report 
  was 
  accompanied 
  by 
  a 
  geologic 
  map 
  giving 
  the 
  boundaries 
  

   of 
  the 
  Hamilton 
  formation 
  and 
  of 
  the 
  Sherburne 
  and 
  Ithaca 
  for- 
  

   mations 
  mapped 
  together 
  for 
  Chenango, 
  Otsego, 
  Schoharie 
  and 
  

   Albany 
  counties. 
  

  

  During 
  the 
  summer 
  of 
  1897 
  field 
  work 
  was 
  resumed 
  in 
  eastern 
  

   New 
  York 
  and 
  the 
  formations 
  of 
  these 
  series 
  were 
  studied 
  and 
  

   mapped 
  from 
  the 
  southern 
  part 
  of 
  Schoharie 
  and 
  Albany 
  counties 
  

   across 
  Greene, 
  Ulster, 
  Sullivan 
  and 
  Orange 
  counties 
  to 
  the 
  New 
  

   York-Pennsylvania 
  state 
  line 
  along 
  the 
  Delaware 
  river. 
  The 
  

   Chemung 
  formation 
  also 
  was 
  studied 
  from 
  the 
  Susquehanna 
  valley 
  

   eastward 
  across 
  Delaware 
  co. 
  till 
  its 
  rocks 
  merge 
  into 
  the 
  red 
  

   and 
  gray 
  sandstones 
  and 
  shales 
  of 
  the 
  Catskill 
  mountain 
  region 
  

   which 
  are 
  generally 
  called 
  the 
  Catskill 
  formation. 
  

  

  The 
  present 
  report 
  will 
  begin 
  with 
  the 
  Susquehanna 
  valley 
  

   where 
  part 
  1 
  closed, 
  and 
  will 
  describe 
  the 
  formations 
  from 
  that 
  

   valley 
  to 
  the 
  Delaware 
  river. 
  The 
  continuation 
  of 
  the 
  areal 
  dis- 
  

   tribution 
  of 
  the 
  formations 
  represented 
  on 
  the 
  geologic 
  map 
  in 
  

   part 
  1 
  is 
  shown 
  on 
  the 
  geologic 
  map 
  accompanying 
  this 
  report. 
  

  

  SUSQUEHANNA 
  VALLEY 
  SECTION 
  

  

  The 
  Susquehanna 
  river 
  forms 
  the 
  outlet 
  of 
  Otsego 
  lake 
  near 
  the 
  

   central 
  part 
  of 
  Otsego 
  co., 
  and 
  its 
  course 
  is 
  only 
  slightly 
  west 
  

   of 
  south 
  till 
  the 
  southern 
  line 
  of 
  the 
  county 
  is 
  reached 
  near 
  which 
  

   it 
  receives 
  Schenevus 
  creek 
  and 
  the 
  Charlotte 
  river 
  from 
  the 
  east. 
  

   Then 
  its 
  direction 
  is 
  southwest 
  across 
  the 
  southern 
  part 
  of 
  Otsego 
  

   co., 
  between 
  Otsego 
  and 
  Delaware 
  counties 
  and 
  across 
  the 
  

   southeastern 
  part 
  of 
  Chenango 
  co., 
  when 
  it 
  turns 
  nearly 
  south- 
  

   erly 
  and 
  crosses 
  the 
  eastern 
  part 
  of 
  Broome 
  co. 
  into 
  Pennsyl- 
  

   vania. 
  The 
  Hamilton 
  and 
  Sherburne 
  formations 
  as 
  exposed 
  along 
  

   the 
  upper 
  course 
  of 
  this 
  river 
  have 
  already 
  been 
  described. 
  5 
  

  

  a 
  P. 
  82-222. 
  

  

  b 
  18th 
  an. 
  report 
  N. 
  Y. 
  state 
  geologist, 
  p. 
  198-204 
  

  

  