﻿i86 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  ously 
  tilted 
  fault 
  blocks 
  will 
  no 
  doubt 
  furnish 
  other 
  examples 
  of 
  

   these 
  inliers 
  when 
  fully 
  mapped. 
  Likewise 
  the 
  folded 
  region 
  on 
  

   the 
  east 
  side 
  of 
  the 
  Hudson 
  and 
  in 
  Orange 
  county 
  contains 
  in- 
  

   liers 
  whose 
  principal 
  cause 
  is 
  faulting, 
  but 
  all 
  of 
  these 
  are 
  also 
  

  

  more 
  or 
  less 
  involved 
  in 
  folding. 
  

  

  Fig. 
  26 
  Diagram 
  of 
  faulted 
  and 
  tilted 
  blocks 
  in 
  eastern 
  Ftilton 
  county, 
  N. 
  Y. 
  (after 
  

   Darton). 
  Looking 
  north; 
  showing 
  relations 
  of 
  inliers 
  of 
  text 
  figure 
  25 
  to 
  faults 
  

  

  Where 
  a 
  block 
  has 
  remained 
  standing 
  between 
  two 
  faults 
  inclin- 
  

   ing 
  away 
  from 
  each 
  other, 
  a 
  horst 
  is 
  produced. 
  This 
  group 
  of 
  

   inliers 
  has 
  typically 
  the 
  form 
  of 
  a 
  parallelogram 
  or 
  of 
  a 
  rectangle. 
  

   I^he 
  greater 
  portion 
  of 
  the 
  Precambric 
  inlier 
  at 
  Little 
  Falls, 
  that 
  

   to 
  the 
  east 
  of 
  the 
  town, 
  partakes 
  of 
  the 
  nature 
  of 
  a 
  horst 
  by 
  being 
  

   included 
  between 
  two 
  parallel 
  faults 
  of 
  opposite 
  throw, 
  as 
  shown 
  

   by 
  Gushing 
  [see 
  text 
  fig. 
  27, 
  28]. 
  

  

  As 
  a 
  horst 
  of 
  the 
  first 
  order 
  in 
  this 
  State, 
  we 
  have 
  probably 
  to 
  

   consider 
  the 
  large 
  inlier 
  of 
  gneisses 
  and 
  associated 
  rocks 
  of 
  the 
  

   Highlands, 
  since 
  Berkey^ 
  has 
  shown 
  that 
  this 
  block 
  is 
  bounded 
  

   by 
  two 
  parallel 
  faults 
  between 
  Cornwall 
  and 
  Peekskill. 
  It 
  is 
  

   stated 
  by 
  Berkey 
  [loc. 
  cit. 
  p. 
  374] 
  that 
  the 
  northern 
  fault 
  con- 
  

   sists 
  rather 
  of 
  a 
  succession 
  of 
  them, 
  '' 
  each 
  separate 
  fault 
  line 
  strik- 
  

   ing 
  out 
  towar<i 
  the 
  northeast 
  into 
  the 
  bounding 
  slates 
  and 
  its 
  place 
  

  

  ' 
  Berkey, 
  C. 
  P. 
  N. 
  Y. 
  State 
  Mus. 
  Bui. 
  107. 
  IQ07. 
  

  

  