﻿272 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  south 
  is 
  a 
  good 
  exposure 
  of 
  red 
  shale. 
  On 
  the 
  Geologic 
  map 
  of 
  

   New 
  York 
  the 
  base 
  of 
  the 
  Chemung 
  is 
  represented 
  as 
  crossing 
  the 
  

   highway 
  just 
  above 
  this 
  fork 
  which 
  is 
  1260 
  feet 
  or 
  more 
  above 
  

   the 
  lowest 
  reds 
  seen 
  in 
  Durham 
  creek. 
  This 
  would 
  give 
  a 
  thick- 
  

   ness 
  of 
  1250 
  to 
  1300 
  feet 
  for 
  the 
  Oneonta 
  formation. 
  Above 
  the 
  

   road 
  fork 
  on 
  the 
  southern 
  road 
  there 
  are 
  120 
  feet 
  of 
  nearly 
  con- 
  

   tinuous 
  outcrops 
  of 
  rocks 
  which 
  are 
  mostly 
  reddish 
  shales 
  with 
  

   some 
  greenish 
  streaks. 
  Lithologically 
  they 
  are 
  not 
  different 
  from 
  

   the 
  reds 
  of 
  the 
  Oneonta 
  below 
  or 
  those 
  of 
  the 
  Catskill 
  above. 
  

   On 
  account 
  of 
  the 
  supposed 
  Chemung 
  age 
  of 
  the 
  rocks 
  for 
  the 
  

   succeeding 
  250 
  feet 
  the 
  outcrops 
  from 
  this 
  fork 
  to 
  the 
  Sutton 
  

   gap 
  were 
  carefully 
  examined 
  by 
  my 
  assistant 
  in 
  the 
  Greene 
  

   county 
  field 
  work, 
  Mr 
  R. 
  B. 
  Rowe, 
  and 
  myself. 
  

  

  As 
  already 
  stated, 
  from 
  the 
  top 
  of 
  the 
  greenish 
  sandstones 
  at 
  

   the 
  roadworks 
  1990 
  feet 
  A. 
  T., 
  for 
  120 
  feet 
  the 
  rocks 
  are 
  mainly 
  

   red 
  shales, 
  as 
  shown 
  on 
  the 
  south 
  road, 
  on 
  the 
  western 
  road 
  at 
  

   2140 
  feet 
  A. 
  T. 
  is 
  red 
  shale 
  which 
  contains 
  thebranching 
  plant- 
  

   like 
  form 
  not 
  uncommon 
  in 
  the 
  Catskill 
  rocks. 
  This 
  is 
  succeeded 
  

   by 
  massive 
  gray 
  sandstone 
  which 
  is 
  partly 
  covered 
  in 
  the 
  field 
  but 
  

   apparently 
  extends 
  to 
  2210 
  feet 
  A. 
  T. 
  with 
  a 
  stratum 
  of 
  red 
  shale 
  

   near 
  the 
  middle 
  of 
  the 
  zone. 
  About 
  55 
  feet 
  higher 
  is 
  the 
  Sutton 
  

   gap 
  pass 
  which 
  on 
  the 
  Geologic 
  map 
  of 
  New 
  York 
  is 
  represented 
  

   as 
  at 
  the 
  base 
  of 
  the 
  Catskill 
  formation. 
  The 
  position 
  and 
  char- 
  

   acter 
  of 
  these 
  rocks 
  which 
  have 
  been 
  referred 
  to 
  the 
  Chemung 
  

   are 
  well 
  shown 
  in 
  B 
  5 
  of 
  the 
  accompanying 
  section. 
  Mr 
  Darton 
  

   described 
  these 
  so-called 
  Chemung 
  rocks 
  as 
  follows: 
  " 
  This 
  mass 
  

   becomes 
  harder 
  and 
  coarser 
  eastward 
  and 
  was 
  traced 
  to 
  and 
  

   along 
  the 
  eastern 
  front 
  of 
  the 
  Catskill 
  mountains, 
  its 
  base 
  defin- 
  

   ing 
  the 
  upper 
  limit 
  of 
  the 
  Oneonta 
  formation. 
  Its 
  thickness 
  aver- 
  

   ages 
  about 
  250 
  feet. 
  It 
  is 
  overlain 
  by 
  a 
  red 
  shale 
  bed 
  25 
  to 
  30 
  

   feet 
  in 
  thickness 
  and 
  this 
  in 
  turn 
  is 
  overlain 
  by 
  the 
  thick 
  mass 
  of 
  

   hard, 
  gray 
  sandstone 
  on 
  which 
  the 
  old 
  Mountain 
  house 
  is 
  built. 
  

   At 
  a 
  point 
  about 
  four 
  miles 
  due 
  west 
  of 
  Durham 
  some 
  molluscan 
  

   remains 
  were 
  found 
  in 
  a 
  softer 
  gray 
  bed 
  about 
  175 
  feet 
  above 
  the 
  

   summit 
  of 
  the 
  Oneonta 
  formation. 
  One 
  fairly 
  distinct 
  individual 
  

  

  