﻿Refort 
  of 
  the 
  State 
  Geologist. 
  521 
  

  

  covered 
  by 
  a 
  Champlain 
  sand 
  plain. 
  Their 
  location 
  and 
  the 
  

   structural 
  features 
  which 
  they 
  present 
  are 
  shown 
  by 
  the 
  dip 
  

   marks 
  on 
  the 
  map 
  and 
  by 
  the 
  sections. 
  There 
  are 
  many 
  expo- 
  

   sures 
  in 
  the 
  eastern 
  part 
  of 
  the 
  city, 
  and 
  in 
  those 
  near 
  the 
  Ulster 
  

   and 
  Delaware 
  railway, 
  east 
  of 
  the 
  station, 
  an 
  irregular 
  synclinal 
  

   is 
  seen, 
  which 
  extends 
  across 
  the 
  principal 
  axes 
  of 
  the 
  north 
  and 
  

   south 
  flexure. 
  The 
  dips 
  are 
  very 
  variable 
  along 
  this 
  belt 
  and 
  

   the 
  beds 
  are 
  considerably 
  broken. 
  There 
  are 
  many 
  veins 
  of 
  

   calcite 
  in 
  the 
  fractured 
  portions 
  which 
  give 
  a 
  rather 
  unusual 
  

   checkered 
  aspect 
  to 
  the 
  limestone. 
  

  

  Southwest 
  of 
  Kingston, 
  up 
  the 
  Esopus 
  valley, 
  there 
  extends 
  a 
  

   wide 
  belt 
  of 
  Onondaga 
  limestone. 
  It 
  is 
  traversed 
  by 
  gentle 
  

   flexures 
  which 
  extend 
  from 
  the 
  southward 
  and 
  gradually 
  die 
  out 
  

   north 
  of 
  Esopus 
  creek. 
  On 
  the 
  anticlinals 
  the 
  Esopus 
  shales 
  

   extend 
  northward 
  in 
  fringes, 
  and 
  there 
  are 
  corresponding 
  south- 
  

   ward 
  extensions 
  of 
  the 
  limestone 
  in 
  the 
  adjoining 
  synclinals. 
  

   The 
  most 
  prominent 
  of 
  these 
  flexures 
  are 
  about 
  Hurley. 
  On 
  

   the 
  west 
  side 
  of 
  the 
  Esopus 
  creek 
  there 
  rise 
  steep 
  slopes 
  of 
  

   Hamilton 
  shales 
  surmounted 
  by 
  terraces 
  of 
  the 
  flagstone 
  

   series. 
  The 
  slope 
  is 
  steep 
  and 
  continues 
  for 
  a 
  long 
  distance, 
  but 
  

   it 
  is 
  broken 
  down 
  for 
  an 
  interval 
  west 
  of 
  Kingston. 
  The 
  

   beds 
  are 
  dark 
  shales 
  with 
  intercalated 
  thin 
  sandy 
  beds. 
  There 
  

   are 
  many 
  exposures 
  north 
  and 
  west 
  of 
  Kingston 
  in 
  slopes 
  and 
  

   along 
  creeks. 
  

  

  Southeast 
  from 
  'Wilbur 
  the 
  monoclinal 
  ridge 
  continues 
  for 
  

   some 
  distance 
  along 
  the 
  north 
  side 
  of 
  Kondout 
  creek, 
  presenting 
  

   the 
  general 
  features 
  shown 
  on 
  the 
  left 
  of 
  section 
  Y, 
  plate 
  4. 
  The 
  

   synclinal 
  and 
  anticlinal 
  of 
  Esopus 
  shale 
  west 
  of 
  this 
  ridge 
  pitch 
  

   up 
  to 
  the 
  southward, 
  and, 
  finally, 
  the 
  underlying 
  formations 
  are 
  

   brought 
  up 
  in 
  succession 
  to 
  the 
  surface. 
  These 
  are, 
  however, 
  

   soon 
  cut 
  off 
  to 
  the 
  westward 
  by 
  Esopus 
  shales 
  brought 
  up 
  

   by 
  a 
  fault 
  which 
  begins 
  on 
  the 
  arch 
  of 
  the 
  anticlinal 
  and 
  

   gradually 
  crosses 
  the 
  ridge 
  to 
  the 
  southward. 
  The 
  structure 
  

   of 
  this 
  district 
  was 
  determined 
  by 
  Prof. 
  W. 
  M. 
  Davis, 
  

   and 
  in 
  the 
  following 
  figure 
  a 
  portion 
  of 
  his 
  map 
  is 
  repro- 
  

   duced, 
  which 
  I 
  believe 
  fully 
  illustrates 
  the 
  relations. 
  I 
  have 
  

   introduced 
  on 
  this 
  map 
  a 
  portion 
  of 
  the 
  northeastern 
  flank 
  

   of 
  the 
  Rosendale-Whiteport 
  anticlinal 
  which 
  was 
  not 
  shown 
  on 
  

   the 
  original. 
  The 
  structure 
  of 
  the 
  south 
  end 
  of 
  the 
  ridge 
  is 
  also 
  

   shown 
  in 
  the 
  first 
  section 
  on 
  plate 
  7. 
  

   66 
  

  

  