﻿GEOLOGICAL 
  SURVEY 
  OF 
  THE 
  STATE 
  OF 
  NEW 
  YORK. 
  

  

  (GEOLOGICAL 
  MAP.) 
  

  

  Preliminary 
  Report 
  on 
  the 
  Geology 
  of 
  Ulster 
  

  

  County. 
  

  

  By 
  N. 
  H. 
  DARTON. 
  

  

  Contents 
  : 
  

  

  Physiography. 
  General 
  Structural 
  Relations. 
  Stratigraphy.— 
  White 
  

   conglomeratic 
  sandstone. 
  Red 
  conglomeratic 
  sandstone. 
  Upper 
  flag 
  series. 
  

   Lower 
  flag 
  series. 
  Hamilton 
  shales. 
  Onondaga 
  limestone. 
  Esopus 
  shale. 
  

   Oriskany 
  sandstone. 
  Upper 
  shaly 
  limestone. 
  Becraft 
  limestone. 
  Loicer 
  

   shaly 
  limestone. 
  Pentamerus 
  limestone. 
  Tentaculite 
  limestone. 
  Cement 
  

   and 
  waterlime 
  series. 
  Coralline 
  limestone. 
  Clinton 
  to 
  Medina 
  beds. 
  

   Shawangunk 
  grit. 
  Hudson 
  river 
  formation. 
  Wappinger 
  limestone. 
  Local 
  

   Geology. 
  — 
  The 
  limestone 
  belt 
  from 
  West 
  Camp 
  to 
  Katrine. 
  Kingston 
  

   region, 
  Rosendale-Whiteport 
  cement 
  region. 
  The 
  Shawangunk 
  moun- 
  

   tain. 
  The 
  Rondout 
  valley 
  from 
  above 
  High 
  Falls 
  to 
  beyond 
  Ellenville. 
  

   The 
  Catskill 
  mountains. 
  The 
  Southeastern 
  Townships. 
  

  

  James 
  Hall, 
  State 
  Geologist 
  : 
  

  

  Sib. 
  — 
  Ulster 
  county 
  is 
  in 
  central 
  southeastern 
  JSTew 
  York 
  and 
  

   occupies 
  an 
  area 
  of 
  approximately 
  1400 
  square 
  miles. 
  

  

  It 
  extends 
  from 
  a 
  frontage 
  along 
  the 
  Hudson 
  river 
  about 
  

   thirty-seven 
  miles 
  westward 
  into 
  the 
  southern 
  Catskills. 
  To 
  the 
  

   south 
  it 
  is 
  bounded 
  by 
  Orange 
  county, 
  to 
  the 
  southwest 
  by 
  Sulli- 
  

   van 
  county, 
  to 
  the 
  northwest 
  by 
  Delaware 
  county, 
  and 
  to 
  the 
  

   north 
  by 
  Greene 
  county. 
  

  

  The 
  area 
  of 
  Ulster 
  county 
  presents 
  a 
  considerable 
  diversity 
  of 
  

   topographic 
  features, 
  comprising 
  mountains 
  of 
  several 
  kinds, 
  

   hills 
  and 
  ridges 
  in 
  great 
  variety, 
  valleys 
  of 
  a 
  number 
  of 
  types, 
  

   terraces, 
  glacial 
  phenomena 
  and 
  drainage 
  in 
  various 
  stages 
  of 
  

   development. 
  

  

  In 
  plate 
  1 
  an 
  attempt 
  has 
  been 
  made 
  to 
  represent 
  the 
  principal 
  

   physiographic 
  features 
  of 
  the 
  county 
  by 
  a 
  device 
  known 
  as 
  a 
  

  

  