﻿AGE 
  OF 
  THE 
  TACONIC 
  SYSTEM. 
  399 
  

  

  an 
  examination 
  across 
  from 
  Stockbridge 
  in 
  Berkshire 
  county, 
  Mas- 
  

   sachusetts, 
  on 
  the 
  east, 
  toward 
  the 
  Hudson 
  River 
  on 
  the 
  west, 
  that 
  

   the 
  beds 
  have 
  throughout 
  an 
  eastward 
  dip, 
  and 
  make 
  one 
  conform- 
  

   able 
  series 
  *. 
  

  

  In 
  the 
  same 
  year 
  the 
  report 
  of 
  Prof. 
  Edward 
  Hitchcock, 
  on 
  the 
  

   Geology 
  of 
  Massachusetts, 
  was 
  published 
  in 
  two 
  volumes 
  quarto 
  f. 
  

   He 
  states 
  that 
  in 
  Berkshire 
  or 
  Western 
  Massachusetts, 
  the 
  limestone 
  

   and 
  all 
  the 
  other 
  associated 
  rocks 
  (" 
  gneiss, 
  mica-slate, 
  talcose 
  slate 
  

   [strictly, 
  hydromica-schist], 
  and 
  quartz-rock 
  ") 
  dip, 
  as 
  a 
  general 
  fact, 
  

   eastward 
  ; 
  that 
  these 
  rocks 
  are 
  often 
  found 
  interstratified 
  with 
  one 
  

   another 
  ; 
  that, 
  on 
  the 
  west 
  side 
  of 
  the 
  Taconic 
  range, 
  the 
  western 
  

   limestone 
  is 
  seen 
  at 
  a 
  locality 
  he 
  mentions 
  passing 
  under 
  the 
  slate 
  : 
  

   that 
  at 
  other 
  points 
  west 
  of 
  Massachusetts 
  the 
  limestone 
  alternates 
  

   with 
  argillaceous 
  slate 
  ; 
  and 
  concludes 
  " 
  that 
  the 
  limestone 
  of 
  

   Berkshire 
  County 
  is 
  of 
  the 
  same 
  age 
  as 
  the 
  rocks 
  with 
  which 
  it 
  is 
  

   interstratified." 
  

  

  Professor 
  W. 
  W. 
  Mather, 
  one 
  of 
  the 
  geologists 
  associated 
  with 
  

   Prof. 
  Emmons 
  in 
  the 
  Geological 
  Survey 
  of 
  the 
  State 
  of 
  New 
  York, 
  and 
  

   whose 
  Report, 
  published 
  in 
  1843, 
  makes 
  a 
  quarto 
  volume 
  of 
  650 
  

   pages 
  J, 
  gives, 
  on 
  plates 
  14, 
  16, 
  17, 
  18, 
  sections 
  of 
  the 
  rocks 
  through 
  

   the 
  Taconic 
  range, 
  and 
  to 
  its 
  centre 
  (the 
  position 
  of 
  the 
  New 
  York 
  

   State 
  boundary 
  line) 
  ; 
  and 
  in 
  each 
  of 
  them 
  the 
  schist 
  and 
  limestone 
  

   are 
  made 
  conformable. 
  In 
  the 
  text 
  of 
  the 
  Report, 
  a 
  chapter 
  is 
  de- 
  

   voted 
  to 
  the 
  " 
  Taconic 
  System 
  " 
  (so 
  named 
  previously 
  by 
  Prof. 
  Em- 
  

   mons), 
  and 
  the 
  rocks 
  are 
  made 
  Lower 
  Silurian. 
  

  

  Professor 
  Emmons, 
  in 
  the 
  account 
  of 
  the 
  Taconic 
  system 
  in 
  his 
  

   New-York 
  Geological 
  Report 
  of 
  1842 
  (and 
  also 
  in 
  his 
  later 
  publica- 
  

   tions 
  on 
  the 
  subject 
  §) 
  represents 
  the 
  schists 
  and 
  limestones 
  as 
  con- 
  

   formable, 
  and 
  as 
  having 
  a 
  prevailing 
  eastward 
  dip. 
  These 
  formations 
  

   were 
  the 
  chief 
  parts 
  of 
  his 
  Taconic 
  system 
  ; 
  and 
  this 
  conformability 
  

   was 
  with 
  him 
  evidence 
  that 
  they 
  were 
  one 
  in 
  system. 
  It 
  is 
  true 
  he 
  

   called 
  the 
  rocks 
  jne-Silurian 
  . 
  but 
  this 
  was 
  the 
  same 
  for 
  all, 
  the 
  

   limestones 
  as 
  well 
  as 
  the 
  schists. 
  

  

  Sir 
  William 
  Logan, 
  the 
  late 
  able 
  director 
  of 
  the 
  Geological 
  Survey 
  

   of 
  Canada, 
  and 
  one 
  of 
  the 
  most 
  cautious 
  geologists 
  of 
  his 
  time, 
  

  

  * 
  American 
  Journal 
  of 
  Science, 
  vol. 
  xlvii. 
  p. 
  151, 
  1844. 
  

  

  t 
  Final 
  Eeport 
  on 
  the 
  Geology 
  of 
  Massachusetts. 
  2 
  vols., 
  300 
  and 
  830 
  pp., 
  

   4to, 
  with 
  14 
  and 
  55 
  plates, 
  1841. 
  

  

  | 
  Geology 
  of 
  New 
  York 
  : 
  part 
  i., 
  comprising 
  the 
  Geology 
  of 
  the 
  First 
  Geo- 
  

   logical 
  District 
  ; 
  by 
  Prof. 
  W. 
  W. 
  Mather, 
  Prof. 
  Nat. 
  Hist, 
  in 
  the 
  Ohio 
  Uni- 
  

   versity. 
  654 
  pp. 
  4to, 
  with 
  46 
  plates, 
  including 
  a 
  geological 
  map. 
  Albany, 
  

   N. 
  Y., 
  1843. 
  

  

  § 
  Agriculture 
  of 
  New 
  York 
  ; 
  by 
  Ebenezer 
  Emmons, 
  M.D. 
  Vol. 
  i., 
  being 
  one 
  

   of 
  the 
  Reports 
  of 
  the 
  Geological 
  Survey 
  of 
  the 
  State, 
  and 
  lettered, 
  on 
  the 
  cover, 
  

   part 
  v. 
  Agriculture. 
  372 
  pp. 
  4to, 
  with 
  plates. 
  Albany, 
  N. 
  Y., 
  1846. 
  The 
  

   chapter 
  on 
  the 
  Taconic 
  System 
  covers 
  pp. 
  45-112. 
  

  

  American 
  Geology, 
  by 
  Ebenezer 
  Emmons. 
  Vol. 
  i., 
  194and252pp. 
  8vo, 
  with 
  

   18 
  plates. 
  Albany, 
  1855. 
  Chapter 
  on 
  the 
  Taconic 
  Systems 
  occupies 
  pp. 
  1-124 
  

   of 
  part 
  ii. 
  

  

  Geological 
  Eeport 
  on 
  the 
  Midland 
  Counties 
  of 
  North 
  Carolina, 
  by 
  E. 
  Emmons, 
  

   352 
  pp. 
  8vo, 
  with 
  9 
  plates 
  and 
  several 
  maps. 
  New 
  York, 
  1856. 
  Chapters 
  on 
  

   the 
  Taconic 
  System 
  occupy 
  pp. 
  49-72. 
  

  

  