﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  121 
  

  

  ant 
  was 
  that 
  by 
  James 
  Hall, 
  a 
  Geological 
  ]\Iap 
  of 
  the 
  Middle 
  and 
  

   Western 
  States, 
  which 
  has 
  had 
  a 
  powerful 
  influence 
  on 
  the 
  geol- 
  

   og}- 
  of 
  eastern 
  United 
  States. 
  This 
  hand-colored 
  map 
  indicates 
  

   the 
  phenomenal 
  advance 
  made 
  in 
  stratigraphy 
  since 
  the 
  publication 
  

   of 
  Eaton's 
  map 
  of 
  the 
  State 
  12 
  years 
  before, 
  and 
  Hall's 
  map 
  

   appears 
  with 
  divisions, 
  a 
  number 
  of 
  which 
  have 
  remained 
  almost 
  

   as 
  set 
  down, 
  to 
  the 
  present 
  day. 
  In 
  the 
  interval 
  between 
  the 
  

   two 
  maps, 
  Murchison 
  and 
  Sedgwick 
  in 
  Great 
  Britain 
  had 
  carried 
  

   on 
  their 
  stratigraphic 
  studies 
  clearing 
  up 
  or 
  even 
  beginning 
  a 
  real 
  

   classification 
  of 
  sedimentary 
  strata. 
  The 
  efforts 
  of 
  these 
  men 
  were 
  

   felt 
  in 
  America, 
  and 
  Xew 
  York 
  State 
  forged 
  its 
  way 
  to 
  the 
  front 
  

   under 
  the 
  leadership 
  of 
  James 
  Hall, 
  who 
  in 
  turn 
  was 
  guided 
  by 
  

   the 
  overruling- 
  persuasion 
  of 
  Murchison. 
  

  

  Accompanying 
  these 
  reports 
  and 
  published 
  separately 
  was 
  also 
  

   the 
  famous 
  " 
  1842 
  "* 
  map 
  of 
  the 
  State 
  Geologists. 
  Previous 
  to 
  its 
  

   appearance 
  all 
  geologic 
  mapping 
  had 
  been 
  greatly 
  hampered 
  by 
  a 
  

   lack 
  of 
  accurate 
  base 
  maps 
  on 
  which 
  to 
  indicate 
  the 
  geological 
  

   formations. 
  Therefore 
  the 
  State 
  had 
  a 
  special 
  map 
  engraved 
  for 
  use 
  

   by 
  the 
  survey 
  and 
  this 
  was 
  used 
  in 
  the 
  1842 
  map. 
  This 
  was 
  hand- 
  

   colored, 
  prepared 
  bv 
  the 
  four 
  geologists, 
  Emmons, 
  Hall, 
  \"'anuxem 
  

   and 
  IMather. 
  They 
  had 
  been 
  obliged 
  to 
  create 
  what 
  was 
  called 
  the 
  

   " 
  Xew 
  York 
  system 
  " 
  of 
  rocks 
  including 
  the 
  strata 
  from 
  the 
  Pots- 
  

   dam 
  to 
  the 
  Carboniferous, 
  as 
  they 
  were 
  as 
  yet 
  unable 
  to 
  correlate 
  

   the 
  various 
  strata 
  with 
  Murchison's 
  Cambrian, 
  Silurian 
  and 
  De- 
  

   vonian. 
  The 
  central 
  mass 
  of 
  the 
  Adirondacks 
  was 
  all 
  colored 
  as 
  

   Primary-. 
  

  

  Dr 
  Emmons's 
  views 
  in 
  regard 
  to 
  the 
  Taconic 
  system 
  were 
  at 
  

   variance 
  with 
  those 
  of 
  other 
  geologists 
  and 
  later 
  (1844) 
  he 
  pre- 
  

   pared 
  a 
  map 
  on 
  the 
  same 
  base 
  as 
  the 
  former 
  one, 
  but 
  having 
  his 
  

   Taconic 
  system 
  upon 
  it. 
  This 
  has 
  been 
  called 
  the 
  '' 
  Emmons 
  map." 
  

   It 
  was, 
  however, 
  never 
  widely 
  distributed. 
  The 
  1842 
  map, 
  as 
  Pro- 
  

   fessor 
  Marcou 
  says,^ 
  marked 
  " 
  a 
  second 
  starting 
  point 
  in 
  American 
  

   geology 
  " 
  and 
  adds 
  that 
  it 
  gave 
  a 
  good 
  classification 
  of 
  the 
  Ameri- 
  

   can 
  paleozoic 
  rocks 
  due 
  mainly 
  to 
  the 
  researches 
  of 
  Emmons 
  and 
  

   Vanuxem, 
  an 
  unjust 
  comment 
  due 
  to 
  his 
  personal 
  dislike 
  to 
  Pro- 
  

   fessor 
  Hall, 
  and 
  giving 
  him 
  but 
  scant 
  credit 
  for 
  his 
  important 
  share 
  

   in 
  the 
  work. 
  

  

  The 
  next 
  published 
  maps 
  were 
  those 
  of 
  Sir 
  Charles 
  Lyell 
  accom- 
  

   panying 
  his 
  North 
  American 
  travels. 
  They 
  dealt 
  with 
  western 
  

   New 
  York, 
  but 
  included 
  one 
  United 
  States 
  map, 
  the 
  New 
  York 
  

  

  'U. 
  S. 
  Geol. 
  Sur. 
  Bui. 
  7. 
  1884. 
  p. 
  59. 
  

  

  