﻿CLASSIFICATION, 
  ETC. 
  OF 
  HAMILTON 
  AND 
  CHEMUNG 
  SERIES 
  265 
  

  

  reached 
  to 
  the 
  west 
  of 
  the 
  immediate 
  valley 
  of 
  the 
  Hudson 
  river 
  

   when 
  we 
  find 
  folded 
  rocks 
  forming 
  steep 
  hills 
  of 
  considerable 
  ele- 
  

   vation, 
  composed 
  of 
  the 
  formation 
  belonging 
  in 
  the 
  upper 
  

   Silurian 
  system 
  and 
  the 
  lower 
  Devonian 
  which 
  extend 
  

   across 
  the 
  county 
  with 
  a 
  ssw 
  trend 
  about 
  parallel 
  to 
  the 
  course 
  of 
  

   the 
  river. 
  The 
  principal 
  streams 
  to 
  the 
  east 
  of 
  the 
  Cats- 
  

   kill 
  mountains 
  are 
  the 
  Catskill 
  creek 
  from 
  the 
  northwest 
  

   and 
  the 
  Kaaterskill 
  from 
  the 
  southwest 
  which 
  unite 
  just 
  after 
  

   cutting 
  through 
  the 
  sharply 
  folded 
  limestone 
  hills 
  west 
  of 
  Catskill 
  

   and 
  enter 
  the 
  Hudson 
  river 
  near 
  that 
  town. 
  The 
  rolling 
  country 
  

   to 
  the 
  west 
  between 
  these 
  hills 
  and 
  the 
  base 
  of 
  the 
  mountains 
  

   is 
  composed 
  mainly 
  of 
  the 
  Hamilton, 
  Sherburne 
  and 
  lower 
  part 
  of 
  

   the 
  Oneonta 
  formations, 
  while 
  from 
  the 
  upper 
  part 
  of 
  the 
  eastern 
  

   border 
  range 
  of 
  the 
  Catskill 
  mountains 
  westward 
  across 
  the 
  county 
  

   into 
  Delaware 
  and 
  southward 
  across 
  Ulster 
  co. 
  the 
  rocks 
  belong 
  

   in 
  the 
  Catskill 
  formation. 
  

  

  Northern 
  townships 
  

  

  The 
  northern 
  tier 
  of 
  townships 
  in 
  Greene 
  to 
  the 
  south 
  of 
  Albany 
  

   co. 
  is 
  composed 
  from 
  east 
  to 
  west 
  of 
  New 
  Baltimore, 
  Green- 
  

   ville 
  and 
  Durham. 
  The 
  great 
  amount 
  of 
  drift 
  found 
  in 
  New 
  Balti- 
  

   more 
  and 
  Greenville 
  townships 
  similar 
  to 
  that 
  already 
  mentioned 
  

   in 
  reference 
  to 
  Westerlo 
  rendered 
  it 
  extremely 
  difficult 
  to 
  trace 
  the 
  

   top 
  of 
  the 
  Hamilton 
  formation. 
  Only 
  a 
  few 
  exposures 
  yielding 
  

   Hamilton 
  fossils 
  were 
  found 
  in 
  New 
  Baltimore 
  township 
  but 
  this 
  

   was 
  due 
  in 
  part 
  to 
  the 
  fact 
  that 
  the 
  country 
  examined 
  somewhat 
  

   carefully 
  was 
  found 
  to 
  be 
  underlaid 
  by 
  rocks 
  near 
  the 
  top 
  of 
  that 
  

   formation 
  and 
  above 
  it 
  in 
  the 
  Sherburne. 
  By 
  the 
  side 
  of 
  the 
  road 
  

   in 
  the 
  hamlet 
  of 
  Medway 
  are 
  bluish 
  shales 
  containing 
  a 
  few 
  Hamil- 
  

   ton 
  fossils, 
  and 
  the 
  rocks 
  are 
  clearly 
  in 
  that 
  formation. 
  The 
  

   species 
  collected 
  are: 
  

  

  1 
  Cumarotoechia 
  prolifica 
  (Hall) 
  H. 
  & 
  C. 
  (c) 
  

  

  2 
  Nucula 
  corbuliformis 
  Hall 
  (?) 
  (rr) 
  

  

  Broken 
  and 
  poorly 
  preserved 
  specimens. 
  

  

  3 
  Tentaculites 
  sp. 
  • 
  (rr) 
  

  

  4 
  Crinoid 
  segments 
  (c) 
  

  

  