﻿Report 
  of 
  the 
  State 
  Geologist. 
  505 
  

  

  Wappinger 
  limestone. 
  — 
  This 
  formation 
  occupies 
  a 
  very 
  small 
  

   area 
  in 
  the 
  southeastern 
  corner 
  of 
  the 
  county, 
  south 
  of 
  Marlborough. 
  

   It 
  consists 
  of 
  light 
  bluish-gray 
  limestone-containing 
  considerable 
  

   arenaceous 
  material 
  and 
  closely 
  resembling 
  the 
  purer 
  varieties 
  of 
  

   the 
  Calciferous 
  sandrock 
  of 
  the 
  Mohawk 
  valley 
  in 
  its 
  general 
  

   appearance. 
  It 
  has 
  the 
  same 
  dull 
  gray 
  glimmering 
  fracture 
  and 
  

   similar 
  cavities 
  containing 
  calcite 
  and 
  quartz, 
  and 
  weather 
  to 
  a 
  

   dull 
  buff 
  tint. 
  The 
  beds 
  are 
  three 
  to 
  four 
  feet 
  thick 
  in 
  greater 
  

   part, 
  with 
  some 
  shaly 
  streaks 
  showing 
  near 
  the 
  lowest 
  exposures. 
  

   The 
  thickness 
  above 
  the 
  surface 
  is 
  150 
  feet, 
  of 
  which 
  the 
  lower 
  

   fifty 
  feet 
  outcrop 
  in 
  a 
  cliff 
  along 
  the 
  Hudson 
  river. 
  The 
  forma- 
  

   tion 
  is 
  the 
  oldest 
  in 
  the 
  county, 
  and 
  its 
  age 
  is 
  upper 
  Cambrian. 
  

   The 
  beds 
  intervening 
  between 
  the 
  Wappinger 
  limestone 
  and 
  the 
  

   Hudson 
  river 
  shales 
  are 
  cut 
  out 
  by 
  the 
  fault 
  which 
  has 
  brought 
  

   the 
  limestone 
  to 
  its 
  present 
  position. 
  

  

  Local 
  Geology. 
  

  

  The 
  limestone 
  belt 
  from 
  West 
  Camp 
  to 
  Katrine. 
  — 
  In 
  plate 
  2 
  

   there 
  is 
  given 
  a 
  series 
  of 
  cross 
  sections 
  illustrating 
  the 
  principal 
  

   structural 
  features 
  from 
  several 
  miles 
  above 
  West 
  Camp 
  to 
  

   a 
  short 
  distance 
  south 
  of 
  Saugerties. 
  The 
  salient 
  features 
  of 
  

   this 
  portion 
  of 
  the 
  belt 
  are 
  the 
  anticlinal 
  valley 
  and 
  the 
  geosyn- 
  

   clinal 
  ridge 
  which 
  end 
  near 
  West 
  Camp, 
  and 
  the 
  anticlinal 
  ridge 
  

   southeast 
  of 
  Katsbaan. 
  The 
  geosynclinal 
  ridge 
  is 
  considerably 
  

   eroded 
  near 
  West 
  Camp 
  and 
  contains 
  only 
  a 
  small 
  thickness 
  of 
  

   lower 
  Shaly 
  beds 
  at 
  the 
  county 
  line. 
  The 
  Pentamerus 
  beds 
  are 
  

   bared 
  over 
  a 
  considerable 
  area 
  southward 
  and 
  terminate 
  to 
  the 
  

   east 
  and 
  west 
  in 
  cliffs 
  of 
  considerable 
  prominence. 
  At 
  the 
  base 
  

   of 
  the 
  cliffs 
  on 
  the 
  east 
  side, 
  just 
  west 
  of 
  the 
  railroad, 
  portions 
  of. 
  

   the 
  Tentaculite 
  and 
  waterlime 
  beds 
  are 
  exposed 
  having 
  an 
  

   aggregate 
  thickness 
  of 
  about 
  sixty 
  feet. 
  The 
  waterlime 
  beds 
  

   are 
  not 
  fully 
  exhibited, 
  but 
  there 
  are 
  no 
  traces 
  of 
  cement 
  rock 
  

   apparent. 
  Underlying 
  them 
  there 
  is 
  exposed 
  at 
  one 
  point 
  a 
  

   three-foot 
  bed 
  of 
  light 
  blue-gray, 
  tough, 
  massive 
  limestone 
  con- 
  

   taining 
  corals 
  of 
  Magara 
  age. 
  On 
  the 
  west 
  side 
  of 
  the 
  ridge 
  the 
  

   limestones 
  dip 
  to 
  the 
  west-northwest 
  ; 
  on 
  the 
  western 
  side 
  to 
  the 
  

   east, 
  both 
  at 
  low 
  angles 
  and 
  with 
  a 
  perceptible 
  pitch 
  to 
  the 
  north. 
  

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