﻿HUDSON 
  RIVER 
  BEDS 
  NEAR 
  ALBANY 
  513 
  

  

  Hudson., 
  have, 
  besides 
  the 
  graptolites, 
  yielded 
  only 
  few 
  other 
  

   fossils, 
  and 
  none 
  of 
  decisive 
  taxonomic 
  value 
  (see 
  p. 
  569); 
  that 
  

   these 
  graptolites 
  are 
  restricted 
  to 
  these 
  beds 
  ; 
  that, 
  farther, 
  these 
  

   beds 
  are 
  hidden 
  away 
  in 
  a 
  huge 
  mass 
  of 
  mostly 
  barren 
  shales 
  and 
  

   sandstones, 
  and 
  that, 
  finally, 
  this 
  whole 
  mass 
  of 
  rocks, 
  which 
  

   contains 
  Trenton, 
  Utica 
  and 
  Lorraine 
  beds 
  in 
  similar 
  lithologic 
  

   development, 
  is 
  in 
  New 
  York 
  as 
  well 
  as 
  in 
  Canada 
  cut 
  off 
  from 
  

   the 
  neighboring 
  terranes 
  by 
  extensive 
  faults, 
  thus 
  apparently 
  also 
  

   frustrating 
  all 
  attempts 
  at 
  a 
  stratigraphic 
  solution 
  of 
  the 
  prob- 
  

   lem. 
  

  

  DISCOVERY 
  OF 
  OUTCROPS 
  (STATIONS) 
  WITH 
  FOSSILS 
  

  

  It 
  is 
  only 
  in 
  view 
  of 
  these 
  extreme 
  difficulties 
  which 
  besiege 
  the 
  

   Hudson 
  river 
  problem 
  that 
  the 
  writer 
  presents* 
  his 
  observations 
  

   on 
  this 
  problem 
  in 
  an 
  area 
  which 
  appears 
  insignificant 
  in 
  com- 
  

   parison 
  with 
  the 
  great 
  geographic 
  extension 
  of 
  the 
  beds 
  in 
  ques- 
  

   tion. 
  But 
  only 
  by 
  restriction 
  to 
  a 
  definite 
  small 
  territory 
  has 
  it 
  

   been 
  possible 
  to 
  visit 
  every 
  outcrop 
  and, 
  what 
  is 
  still 
  more 
  im- 
  

   portant, 
  to 
  collect 
  in 
  every 
  outcrop 
  most 
  exhaustively 
  and 
  min- 
  

   utely. 
  As 
  a 
  gratifying 
  result 
  of 
  this 
  method, 
  there 
  were 
  found 
  in 
  

   the 
  region 
  described 
  in 
  the 
  introduction, 
  29 
  localities 
  which 
  fur- 
  

   nished 
  fossils. 
  These, 
  with 
  7 
  localities 
  known 
  before, 
  give 
  36 
  sta- 
  

   tions 
  with 
  fossils. 
  These 
  can 
  be 
  arranged 
  according 
  to 
  their 
  fos- 
  

   sil 
  contents 
  in 
  four 
  zones, 
  which, 
  following 
  the 
  general 
  strike 
  

   of 
  about 
  n 
  20° 
  e 
  of 
  the 
  rocks 
  in 
  this 
  part 
  of 
  the 
  Hudson 
  river 
  

   valley, 
  extend 
  from 
  n 
  n 
  e 
  to 
  s 
  s 
  w. 
  The 
  stations 
  will 
  be 
  

   described 
  according 
  to 
  these 
  zones 
  (see 
  map). 
  

  

  DESCRIPTION 
  OF 
  STATIONS 
  

  

  A 
  LORRAINE 
  BEDS 
  

  

  Station 
  1. 
  Cohoes 
  falls 
  of 
  the 
  Mohawk 
  river 
  

  

  All 
  along 
  the 
  lower 
  Mohawk 
  and 
  specially 
  from 
  the 
  high 
  falls 
  

   of 
  the 
  river 
  at 
  Cohoes 
  to 
  the 
  islands 
  in 
  the 
  Hudson 
  river 
  opposite 
  

   the 
  mouth 
  of 
  the 
  Mohawk, 
  is 
  exposed 
  an 
  enormous 
  mass 
  of 
  

   greatly 
  contorted 
  rocks 
  (a 
  sketch 
  of 
  these 
  contortions 
  is 
  given 
  by 
  

   Mather, 
  4, 
  pi. 
  2, 
  fig. 
  1) 
  of 
  mostly 
  shaly 
  character; 
  that 
  is 
  argil- 
  

  

  