﻿

  NKW 
  VOKK 
  E 
  Ml 
  SE1 
  M 
  

  

  erthrusl 
  of 
  the 
  eastern 
  wing 
  over 
  the 
  western, 
  bring- 
  

   beds 
  in 
  contact 
  with 
  the 
  Dicellograptus 
  i»rds 
  in 
  

   the 
  >ld 
  (fig, 
  h. 
  

  

  ^ 
  a 
  

  

  a 
  

  

  Fig. 
  -J 
  Orerthnwl 
  fault. 
  

  

  1 
  Reduction 
  to 
  a* 
  plain. 
  The 
  erosion, 
  working 
  proportionally 
  

   in 
  the 
  elevation 
  of 
  the 
  beds 
  and, 
  later, 
  on 
  the 
  abrasion 
  by 
  the 
  

   seas 
  of 
  upper 
  Bilnric 
  and 
  Devonic 
  time, 
  as 
  evinced 
  by 
  the 
  uncon- 
  

   formable 
  deposition 
  of 
  the 
  limestones 
  at 
  Becraft 
  mountain 
  

   (Columbia 
  county), 
  on 
  the 
  " 
  Hudson 
  river 
  " 
  shales, 
  reduced 
  the 
  

   surface 
  of 
  the 
  disturbed 
  area 
  to 
  nearly 
  or 
  entirely 
  the 
  condition 
  

   of 
  a 
  plain. 
  leaving 
  the 
  steeply 
  dipping 
  conformable 
  and 
  inverted 
  

   of 
  beds 
  and 
  the 
  overthrust 
  fault 
  as 
  witnesses 
  of 
  the 
  former 
  

   powerful 
  activity 
  of 
  orogenic 
  forces 
  (fig. 
  5). 
  

  

  f 
  

  

  6 
  

  

  4 
  

  

  c 
  

  

  b 
  

  

  

  -C^^nErE^ 
  

  

  a 
  

  

  _■ 
  5 
  Profile 
  through 
  Iluilson 
  valley 
  at 
  Wateivli.t 
  

  

  The 
  small 
  anticlines 
  i 
  Vly 
  are 
  the 
  weak 
  western 
  

  

  if 
  the 
  fold-producing 
  forces; 
  for 
  they 
  run 
  parallel 
  

  

  to 
  the 
  deformations 
  of 
  the 
  crust 
  in 
  the 
  east, 
  while 
  the 
  

  

  anticlim 
  >. 
  prettj 
  examples 
  of 
  which 
  arc 
  visible 
  along 
  the 
  

  

  