﻿288 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  ! 
  

  

  ish 
  gray 
  sandstone. 
  This 
  is 
  a 
  typical 
  Catskill 
  sandstone 
  and* 
  

   is 
  in 
  the 
  area 
  represented 
  as 
  near 
  the 
  base 
  of 
  that 
  formation 
  on 
  

   the 
  Geologic 
  map 
  of 
  New 
  York. 
  There 
  is 
  a 
  slight 
  syncline 
  in 
  the 
  

   quarry 
  for 
  at 
  the 
  northeast 
  end 
  the 
  dip 
  is 
  1° 
  S, 
  40° 
  W, 
  while 
  at 
  

   the 
  other 
  end 
  it 
  is 
  about 
  1° 
  in 
  the 
  opposite 
  direction. 
  Ledges 
  

   farther 
  up 
  the 
  highway 
  show 
  a 
  dip 
  of 
  1° 
  N, 
  30° 
  E. 
  

  

  After 
  an 
  examination 
  of 
  the 
  area 
  mapped 
  as 
  Chemung 
  on 
  the 
  

   Geologic 
  map 
  of 
  New 
  York 
  to 
  the 
  west 
  of 
  Durham, 
  near 
  Windham, 
  

   south 
  of 
  Ashland, 
  near 
  Lexington, 
  south 
  of 
  the 
  Manorkill 
  and 
  in 
  

   Roxbury 
  it 
  does 
  not 
  appear 
  to 
  the 
  writer 
  that, 
  with 
  the 
  exception 
  

   of 
  the 
  reported 
  discovery 
  of 
  Spirifer 
  disjunctus 
  Sow. 
  west 
  of 
  Dur- 
  

   ham, 
  there 
  is 
  any 
  proof 
  of 
  its 
  Chemung 
  age. 
  The 
  lithologic 
  char- 
  

   acter 
  of 
  the 
  rocks 
  is 
  'not 
  different 
  from 
  that 
  of 
  the 
  Oneonta 
  form- 
  

   ation 
  below 
  or 
  the 
  Catskill 
  above, 
  and 
  with 
  the 
  absence 
  of 
  fossils 
  

   it 
  appears 
  very 
  difficult 
  if 
  not 
  impossible 
  to 
  correlate 
  this 
  zone 
  

   with 
  the 
  Chemung. 
  It 
  is 
  true 
  that 
  a 
  part 
  of 
  the 
  Catskill 
  forma- 
  

   tion 
  of 
  eastern 
  New 
  York 
  is 
  synchronous 
  with 
  the 
  Chemung 
  of 
  

   southern 
  and 
  western 
  New 
  York; 
  but 
  with 
  merely 
  the 
  alternation 
  

   of 
  reds 
  and 
  grays 
  in 
  eastern 
  New 
  York 
  it 
  does 
  not 
  seem 
  possible 
  

   to 
  the 
  writer 
  to 
  divide 
  the 
  mass 
  of 
  rocks 
  into 
  distinct 
  formations 
  

   which 
  can 
  be 
  traced 
  and 
  mapped 
  for 
  any 
  distance. 
  It 
  seems 
  bet- 
  

   ter 
  to 
  leave 
  it 
  as 
  one 
  formation 
  under 
  the 
  name 
  Catskill, 
  not 
  

   failing 
  to 
  recognize 
  that 
  in 
  time 
  it 
  is 
  nearly 
  equivalent 
  to 
  the 
  

   rocks 
  called 
  Portage 
  and 
  Chemung 
  in 
  western 
  New 
  'York. 
  The 
  

   exceptions 
  are 
  at 
  the 
  base 
  of 
  the 
  Catskill, 
  or 
  Oneonta 
  formation 
  

   as 
  we 
  have 
  still 
  called 
  the 
  lower 
  part 
  of 
  this 
  mass 
  of 
  rocks 
  in 
  

   Greene 
  co., 
  which 
  probably 
  does 
  not 
  reach 
  as 
  low 
  as 
  the 
  base 
  

   of 
  the 
  Portage 
  in 
  western 
  New 
  York, 
  and 
  at 
  its 
  top 
  which 
  is 
  prob- 
  

   ably 
  of 
  later 
  age 
  than 
  any 
  of 
  the 
  Chemung 
  in 
  southwestern 
  New 
  

   York 
  or 
  northwestern 
  Pennsylvania. 
  

  

  ULSTER 
  COUNTY 
  

  

  This 
  county 
  which 
  lies 
  directly 
  south 
  of 
  Greene 
  co. 
  extends 
  

   from 
  the 
  Hudson 
  river 
  on 
  the 
  east 
  to 
  Delaware 
  and 
  Sullivan 
  

   counties 
  on 
  the 
  west. 
  The 
  northwestern 
  paft 
  of 
  the 
  county 
  is 
  

   very 
  mountainous, 
  in 
  which 
  region 
  the 
  Catskills 
  reach 
  their 
  cul- 
  

  

  