﻿l6 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  A 
  small 
  patch 
  of 
  the 
  basal 
  quartzite 
  was 
  found 
  resting 
  on 
  the 
  

   granite 
  gneiss 
  at 
  Fly 
  mountain, 
  evidently 
  faulted 
  with 
  it. 
  It 
  was 
  

   also 
  found 
  reposing 
  on 
  a 
  small 
  inlier 
  of 
  these 
  rocks 
  outcropping 
  

   between 
  the 
  base 
  of 
  the 
  Bald 
  Hill 
  spur 
  and 
  the 
  southern 
  extremity 
  

   of 
  the 
  Glenham 
  gneiss 
  belt, 
  in 
  the 
  town 
  of 
  Matteawan. 
  These 
  

   facts 
  afford 
  additional 
  evidence 
  of 
  the 
  age 
  of 
  the 
  rocks 
  of 
  the 
  

   Glenham 
  belt. 
  

  

  Fishkill 
  limestone. 
  This 
  belt 
  of 
  Cambro-Ordovicic 
  limestone 
  

   as 
  displayed 
  within 
  the 
  quadrangle 
  has 
  yielded 
  fossil 
  evidence 
  of 
  

   its 
  age 
  despite 
  the 
  mctamorphism 
  it 
  has 
  undergone. 
  In 
  the 
  Hook 
  

   district 
  south 
  of 
  Johnsville, 
  where 
  the 
  strata 
  have 
  been 
  preserved 
  

   in 
  more 
  nearly 
  their 
  original 
  relationship, 
  I 
  have 
  found 
  the 
  scanty 
  

   but 
  conclusive 
  evidence 
  of 
  the 
  age 
  of 
  the 
  blue, 
  compact 
  limestone 
  

   overlying 
  the 
  hard, 
  compact 
  quartzite 
  in 
  the 
  presence 
  of 
  well 
  pre- 
  

   served 
  opercula 
  of 
  H 
  y 
  o 
  1 
  i 
  t 
  h 
  e 
  1 
  1 
  u 
  s 
  m 
  i 
  c 
  a 
  n 
  s 
  . 
  In 
  the 
  town 
  of 
  

   Fishkill, 
  northwest 
  of 
  the 
  road 
  from 
  Fishkill 
  Village 
  to 
  Matteawan, 
  

   between 
  it 
  and 
  the 
  Glenham 
  gneiss 
  belt, 
  and 
  extending 
  a 
  couple 
  

   of 
  miles 
  roughly 
  paralled 
  with 
  the 
  outcrop 
  of 
  the 
  latter, 
  I 
  have 
  

   traced 
  a 
  belt 
  of 
  hard 
  limestone 
  weathering 
  grayish 
  white, 
  but 
  

   showing 
  buff-colored 
  markings 
  on 
  fresh 
  surfaces, 
  with 
  weathered 
  

   surfaces 
  showing 
  among 
  the 
  lichens 
  the 
  closely 
  compacted 
  whorls 
  

   of 
  what 
  I 
  believe 
  to 
  be 
  O 
  p 
  h 
  i 
  1 
  e 
  t 
  a 
  c 
  o 
  m 
  p 
  a 
  c 
  t 
  a 
  Salter. 
  The 
  

   belt 
  can 
  not 
  be 
  traced 
  beyond 
  the 
  road 
  from 
  Fishkill 
  Village 
  to 
  

   Wappingers 
  Falls. 
  Faults 
  and 
  metamorphism 
  have 
  greatly 
  ob- 
  

   scured, 
  if 
  they 
  have 
  not 
  obliterated 
  it. 
  In 
  the 
  limestone 
  at 
  Old 
  

   Hopewell, 
  near 
  the 
  old 
  furnace, 
  and 
  just 
  north 
  of 
  Gregory's 
  grist- 
  

   mill, 
  I 
  have 
  found 
  fragments 
  of 
  Orthoceras 
  and 
  one 
  complete 
  speci- 
  

   men, 
  as 
  yet 
  unidentified, 
  weathered 
  out 
  on 
  the 
  surfaces 
  of 
  a 
  gray, 
  

   banded 
  crystalline 
  limestone, 
  very 
  close 
  to 
  marble 
  in 
  the 
  degree 
  

   of 
  metamorphism 
  which 
  it 
  shows. 
  

  

  We 
  have 
  evidence 
  of 
  the 
  presence 
  of 
  the 
  lowest 
  Cambric 
  and 
  

   the 
  lowest 
  Ordovicic 
  in 
  this 
  limestone 
  belt, 
  by 
  the 
  discovery 
  for 
  the 
  

   first 
  time, 
  of 
  actual 
  fossils. 
  In 
  the 
  final 
  report 
  other 
  less 
  certainly 
  

   defined 
  but 
  important 
  details 
  may 
  more 
  pertinently 
  be 
  discussed. 
  

  

  Wappinger 
  limestone 
  (Barnegate 
  limestone, 
  Mather). 
  In 
  

   this 
  beh, 
  first 
  called 
  the 
  " 
  Barnegate 
  limestone," 
  by 
  Mather, 
  but 
  

   because 
  of 
  the 
  association 
  which 
  the 
  Wappinger 
  creek 
  has 
  with 
  

   it 
  for 
  many 
  miles, 
  now 
  more 
  commonly 
  called 
  the 
  ''Wappinger 
  

   limestone," 
  additional 
  confirmatory 
  discoveries 
  have 
  been 
  made 
  

   which 
  extend 
  somewhat 
  the 
  boundaries 
  of 
  certain 
  terranes 
  within 
  

  

  