﻿Report 
  of 
  the 
  State 
  Geologist. 
  

  

  561 
  

  

  south 
  of 
  New 
  Paltz 
  landing 
  the 
  cuts 
  are 
  particularly 
  deep 
  and 
  

   exhibit 
  a 
  great 
  variety 
  of 
  structural 
  features 
  in 
  gray 
  slates. 
  

   Near 
  the 
  landing 
  the 
  dips 
  are 
  to 
  the 
  westward, 
  forming 
  a 
  syn- 
  

   clinal 
  between 
  the 
  river 
  and 
  the 
  high 
  ridges 
  of 
  coarse 
  rock 
  west- 
  

   ward. 
  To 
  the 
  northward, 
  part 
  of 
  this 
  synclinal 
  extends 
  to 
  the 
  

   river 
  and 
  is 
  exposed 
  in 
  the 
  railroad 
  cuts. 
  The 
  rocks 
  involved 
  

   are 
  gray 
  sandy 
  shales 
  and 
  gray, 
  flaggy, 
  fine-grained 
  sandstones. 
  

   The 
  shales 
  are 
  abruptly 
  terminated 
  south 
  of 
  Marlborough 
  by 
  a 
  

   fault 
  which 
  brings 
  up 
  the 
  Wappinger 
  limestones. 
  

  

  The 
  limestones 
  occupy 
  a 
  small 
  area 
  in 
  the 
  extreme 
  southeast- 
  

   ern 
  corner 
  of 
  the 
  county. 
  They 
  are 
  exposed 
  in 
  cliffs 
  and 
  rail- 
  

   road 
  cuts 
  extending 
  continuously 
  along 
  the 
  river 
  bank 
  to 
  the 
  

   Orange 
  county 
  line. 
  They 
  extend 
  westward 
  in 
  rolling 
  hills 
  of 
  

   typical 
  limestone 
  character, 
  with 
  many 
  scattered 
  outcrops. 
  The 
  

   dips 
  are 
  to 
  the 
  westward 
  throughout, 
  at 
  an 
  angle 
  of 
  ten 
  degrees 
  

   along 
  the 
  railroad 
  and 
  somewhat 
  more 
  in 
  the 
  hills 
  west. 
  In 
  the 
  

   vicinity 
  of 
  the 
  fault 
  there 
  is 
  considerable 
  local 
  disturbance', 
  

   mainly 
  fracturing. 
  The 
  relations 
  of 
  this 
  fault 
  are 
  quite 
  clearly 
  

   exposed 
  in 
  . 
  the 
  river 
  bank, 
  and 
  in 
  the 
  following 
  figure 
  a 
  sketch 
  

   is 
  given 
  of 
  the 
  principal 
  features. 
  

  

  Fig. 
  17.— 
  Section 
  of 
  fault 
  one-half 
  mile 
  south 
  of 
  Marlborough 
  station, 
  on 
  the 
  Hudson 
  

   river. 
  Looking 
  west. 
  Based 
  on 
  a 
  photograph. 
  

  

  The 
  faultextends 
  to 
  the 
  southwest 
  and 
  then 
  west-southwest 
  

   and 
  passes 
  out 
  of 
  the 
  county. 
  Its 
  course 
  inland 
  is 
  marked 
  by 
  an 
  

   abrupt 
  break 
  between 
  the 
  rounded 
  hills 
  of 
  slate 
  and 
  the 
  knobby 
  

   sur/ace 
  of 
  limestone. 
  

  

  .The 
  limestone 
  has 
  been 
  quarried 
  to 
  some 
  extent, 
  and 
  in 
  a 
  

   quarry 
  a 
  short 
  way 
  above 
  the 
  railroad 
  some 
  of 
  its 
  upper 
  mem- 
  

   bers 
  are 
  well 
  exposed. 
  

  

  Tl 
  

  

  