﻿M.w 
  rOBE 
  BTATE 
  MUSI 
  

  

  Extension 
  of 
  zone 
  of 
  middle 
  Trenton 
  beds 
  

  

  The 
  Ave 
  stations, 
  22-26, 
  establish 
  the 
  presence 
  of 
  a 
  zone 
  of 
  

   e 
  of 
  the 
  genera] 
  appearance 
  of 
  the 
  Hudson 
  river 
  shales 
  and 
  

   sandstones 
  (bul 
  containing 
  some 
  limestone), 
  between 
  Troy 
  and 
  

   Watervliet, 
  which 
  is 
  about 
  l 
  mile 
  wide 
  and 
  equivalent 
  to 
  the 
  

   middle 
  Trenton. 
  This 
  zone 
  conld 
  noi 
  be 
  traced 
  farther 
  south, 
  

   which 
  Taut, 
  however, 
  ftnda 
  its 
  Explanation 
  in 
  the 
  topographic 
  

   conditions 
  prevailing 
  to 
  the 
  south; 
  for 
  the 
  strike 
  of 
  the 
  middle 
  

  

  nioii 
  beds 
  brings 
  them, 
  as 
  an 
  examination 
  of 
  the 
  map 
  will 
  

   show, 
  into 
  the 
  alluvial 
  plain 
  of 
  the 
  Hudson 
  river 
  where 
  outcrops 
  

   absent 
  The 
  zone 
  would 
  then 
  probably 
  pass 
  through 
  the 
  

   lower 
  part 
  of 
  the 
  city 
  of 
  Albany 
  and 
  could 
  be 
  expected 
  along 
  the 
  

   Normans 
  kill 
  above 
  Kenwood 
  and 
  below 
  the 
  Utica 
  shale 
  out- 
  

   crops 
  described 
  above. 
  But 
  along 
  thai 
  part 
  of 
  the 
  river 
  only 
  

   one 
  exposure 
  is 
  found, 
  that 
  at 
  Normansville, 
  and 
  this, 
  unfortu- 
  

   nately, 
  is 
  ion 
  known 
  to 
  have 
  ever 
  yielded 
  any 
  fossils. 
  From 
  here- 
  

   to 
  the 
  Lorraine 
  sandstones 
  and 
  shales 
  at 
  the 
  base 
  of 
  the 
  Helder- 
  

  

  g 
  escarpment 
  no 
  farther 
  outcrops 
  could 
  be 
  found. 
  Both 
  the 
  

   Ylaunians 
  and 
  the 
  Coeymans 
  kills, 
  which 
  have 
  been 
  followed 
  

   by 
  the 
  writer 
  along 
  their 
  entire 
  courses, 
  show 
  outcrops 
  only 
  near 
  

   their 
  mouths, 
  and 
  these 
  belong 
  to 
  the 
  next 
  following 
  zone. 
  The 
  

   outcrops 
  a1 
  the 
  upper 
  Coeymans 
  kill 
  and 
  its 
  tributary, 
  

   the 
  Spray 
  t 
  kill, 
  have 
  been 
  mentioned 
  above. 
  On 
  account 
  of 
  the 
  

   general 
  n 
  ne-s 
  sw 
  strike 
  of 
  all 
  the 
  beds 
  in 
  this 
  region, 
  it 
  can, 
  

   however, 
  be 
  safely 
  surmised 
  thai 
  this 
  zone 
  passes 
  under 
  the 
  Hel- 
  

   derbergs. 
  

  

  D 
  IfORMANSKILL 
  BEDS 
  (LOWEB 
  DIOELLOGRAPTUS 
  ZONE) 
  

  

  Att»i- 
  the 
  pi' 
  sence 
  of 
  these 
  zones 
  of 
  Lorraine, 
  Utica 
  and 
  Tren- 
  

   ton 
  Bhales 
  in 
  the 
  Hudson 
  river 
  valley 
  hud 
  become 
  evident 
  to 
  the 
  

   writer, 
  ;i 
  thorough 
  search 
  for 
  the 
  graptolites 
  of 
  the 
  Normans 
  kill 
  

   or 
  lower 
  Dicellograptus 
  /one 
  was 
  instituted, 
  this 
  zone 
  being, 
  in 
  

  

  ordance 
  with 
  the 
  views 
  of 
  previous 
  writers, 
  sought 
  for 
  be- 
  

   tweeu 
  the 
  Lorraine 
  and 
  Utica, 
  and 
  between 
  the 
  Utica 
  and 
  Tren- 
  

   ton 
  b. 
  There 
  has, 
  however, 
  no 
  trace 
  of 
  these 
  graptolites 
  

  

  d 
  found 
  between 
  or 
  within 
  the 
  Utioa 
  and 
  Lorraine 
  zones, 
  

  

  