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  M 
  w 
  rORK 
  STATE 
  MUSEUM 
  

  

  Btern 
  representative 
  of 
  part 
  of 
  the 
  lower 
  Trenton. 
  It 
  is 
  

   hoped 
  that 
  this 
  end 
  baa 
  beer 
  attained, 
  at 
  leasl 
  in 
  so 
  far 
  that 
  the 
  

   necessity 
  of 
  assuming 
  an 
  inversion 
  of 
  the 
  beds 
  will 
  not 
  be 
  con- 
  

   isarilj 
  fatal 
  to 
  the 
  above 
  mentioned 
  conclusion, 
  

   which 
  appears 
  fully 
  warranted 
  by 
  stratigraphic 
  and 
  paleonto- 
  

   logic 
  evidence. 
  This 
  evidence, 
  which 
  we 
  may 
  be 
  allowed 
  to 
  sum 
  

   op 
  here 
  to 
  emphasize 
  the 
  multiformity 
  of 
  its 
  character, 
  consists 
  

   in 
  the 
  observation 
  of 
  four 
  zones, 
  the 
  lowest 
  of 
  'which 
  is 
  the 
  Nor- 
  

   mans 
  kill 
  shale; 
  the 
  observed 
  intercalation 
  of 
  a 
  conglomerate 
  bed 
  

   containing 
  lower 
  Trenton 
  fossils; 
  and 
  the 
  discovery 
  that 
  this 
  

   shale 
  rests 
  on 
  lower 
  Trenton 
  limestone. 
  

  

  I 
  LASTIC 
  DEVELOPMENT 
  OF 
  TRENTON 
  IN 
  HUDSON 
  

  

  RIVER 
  VALLEY 
  

  

  It 
  seems 
  appropriate 
  to 
  state 
  here 
  certain 
  inferences 
  which 
  

   can 
  be 
  drawn 
  from 
  the 
  principal 
  conclusion 
  of 
  this 
  paper, 
  and 
  

   which 
  seem 
  either 
  to 
  militate 
  againsl 
  other 
  well 
  known 
  facts 
  of 
  

   the 
  geology 
  of 
  New 
  York 
  or 
  apparently 
  are 
  difficult 
  of 
  explana- 
  

   tion. 
  

  

  There 
  is 
  first 
  the 
  shaly 
  development 
  of 
  the 
  mass 
  of 
  the 
  Trenton 
  

   in 
  contrast 
  to 
  its 
  typical 
  calcareous 
  character 
  a 
  short 
  distance 
  to 
  

   tlw 
  wes\ 
  : 
  f'»r 
  the 
  correlation 
  of 
  the 
  Normans 
  kill 
  shales 
  with 
  part 
  

   of 
  the 
  lower 
  Trenton, 
  of 
  the 
  Watervliet 
  beds 
  with 
  the 
  middle 
  

   Trenton 
  and 
  the 
  absence 
  of 
  limestone 
  beds 
  between 
  this 
  zone 
  and 
  

   tic- 
  rtica 
  shale 
  /on.- 
  necessitate 
  the 
  assumption 
  of 
  the 
  replacing 
  

   of 
  Mi.- 
  Trenton 
  limestone 
  principally 
  by 
  shales 
  and 
  sandston 
  

   'lli- 
  dew 
  harmonizes 
  with 
  the 
  well-known 
  fact 
  of 
  the 
  clastic 
  

   flevelopmenl 
  of 
  the 
  majority 
  of 
  the 
  formation's 
  in 
  the 
  Appal- 
  

   ; 
  " 
  •'' 
  £ion, 
  to 
  which 
  the 
  investigated 
  territory, 
  by 
  the 
  char- 
  

  

  er 
  of 
  the 
  disturbances 
  and 
  of 
  those 
  of 
  the 
  neighboring 
  regions 
  

  

  beta 
  £8. 
  This 
  clastic 
  character 
  and 
  the 
  greal 
  thickness 
  of 
  the 
  

  

  mass 
  of 
  shales 
  are 
  both 
  characteristic 
  features 
  of 
  the 
  Appalachian 
  

  

  and 
  of 
  themselves 
  constitute 
  evidence 
  in 
  support 
  of 
  the 
  

  

  structure 
  indicated. 
  

  

  