﻿HUDSON 
  RIVER 
  BEDS 
  NEAR 
  ALBANY 
  551 
  

  

  1 
  Lorraine 
  beds 
  

  

  2 
  Utica 
  beds 
  

  

  3 
  Upper 
  and 
  middle 
  Trenton 
  beds 
  

  

  4 
  Dicellograptus 
  beds; 
  these 
  resting 
  on 
  

  

  5 
  Lower 
  Trenton 
  limestone 
  

  

  The 
  legitimate 
  conclusion 
  to 
  be 
  drawn 
  from 
  this 
  succession 
  of 
  

   beds 
  is 
  that 
  the 
  Dicellograptus 
  zone 
  is 
  homotawial 
  icith 
  a 
  part 
  of 
  

   the 
  middle 
  or 
  lower 
  Trenton 
  limestone. 
  This 
  conclusion 
  stands 
  in 
  

   full 
  accord 
  with 
  the 
  evidence 
  furnished 
  by 
  the 
  conglomerate 
  beds. 
  

  

  None 
  of 
  these 
  zones, 
  however, 
  is 
  entirely 
  uniform 
  in 
  its 
  fossil 
  

   contents, 
  as 
  a 
  comparison 
  of 
  the 
  fossils 
  from 
  the 
  various 
  stations 
  

   easily 
  demonstrates. 
  Not 
  taking 
  into 
  account 
  the 
  difference 
  be- 
  

   tween 
  graptolite 
  and 
  mollusk 
  beds 
  which 
  may 
  be 
  synchronous, 
  

   run 
  into 
  each 
  other 
  and 
  alternate 
  irregularly, 
  it 
  is 
  evident 
  that 
  

   the 
  associations 
  'of 
  fossils 
  in 
  some 
  beds 
  differ 
  greatly 
  from 
  the 
  

   typical 
  faunas 
  of 
  their 
  epoch. 
  

  

  There 
  is 
  first 
  the 
  difference 
  between 
  the 
  typical 
  lower 
  Dicello- 
  

   graptus 
  beds 
  and 
  the 
  Dicellograptus 
  beds 
  of 
  Mt 
  Olympus 
  and 
  

   Lansingburg; 
  farther 
  the 
  remarkable 
  admixture 
  of 
  Trenton 
  fos- 
  

   sils 
  and 
  the 
  presence 
  of 
  the 
  Climacograptus 
  caudatus, 
  

   which 
  is 
  a 
  typical 
  upper 
  Dicellograptus 
  form, 
  in 
  the 
  Utica 
  beds 
  

   of 
  Mechanicsville, 
  and 
  the 
  appearance 
  of 
  Cryptograptus 
  

   tricornis 
  among 
  the 
  Utica 
  fossils 
  of 
  Van 
  Schaick 
  island. 
  

   These 
  latter 
  faunas 
  differ 
  markedly 
  from 
  the 
  typical 
  Utica 
  grap- 
  

   tolite 
  fauna 
  of 
  the 
  Rural 
  cemetery, 
  the 
  penitentiary 
  and 
  the 
  lower 
  

   Normans 
  kill. 
  There 
  is 
  finally 
  the 
  peculiar 
  combination 
  of; 
  Tren- 
  

   ton 
  and 
  Lorraine 
  forms 
  with 
  the 
  Utica 
  fauna 
  of 
  the 
  old 
  observa- 
  

   tory 
  and 
  Green 
  Island. 
  

  

  The 
  full 
  list 
  of 
  the 
  various 
  faunas 
  observed 
  is 
  the 
  following: 
  

  

  Lower 
  Trenton 
  fauna 
  of 
  conglomerate 
  beds 
  of 
  Rysedorph 
  hill, 
  

   consisting 
  at 
  least 
  of 
  three 
  different 
  faunules 
  

  

  Typical 
  lower 
  Dicellograptus 
  fauna 
  

  

  Lower 
  Dicell. 
  fauna 
  of 
  Mt 
  Olym- 
  [ 
  Relative 
  position 
  of 
  

  

  pus 
  and 
  Lansingburg 
  \ 
  these 
  two 
  faunas 
  not 
  

  

  i 
  Dipl. 
  amplexicaulis 
  fauna 
  [ 
  yet 
  clearly 
  determined 
  

  

  Trenton 
  • 
  

  

  