﻿540 
  Forty- 
  seventh 
  Report 
  on 
  the 
  State 
  Musefm. 
  

  

  section 
  of 
  plate 
  7. 
  These 
  undulations 
  are 
  the 
  beginnings 
  of 
  

   the 
  flexures 
  which 
  extend 
  southward 
  into 
  the 
  Shawangunk 
  

   mountain. 
  

  

  The 
  Onondaga 
  limestone 
  occupies 
  a 
  long 
  slope 
  along 
  a 
  belt 
  west 
  

   of 
  the 
  Esopus 
  shales. 
  It 
  is 
  the 
  usual 
  light-blue 
  gray 
  cherty 
  

   limestone. 
  JSTorth 
  of 
  the 
  Cottekill 
  there 
  are 
  several 
  outlying 
  

   masses 
  on 
  the 
  Esopus 
  shales 
  that 
  are 
  so 
  large 
  I 
  have 
  represented 
  

   them 
  on 
  the 
  geologic 
  map. 
  They 
  average 
  about 
  twenty 
  feet 
  in 
  

   diameter 
  and 
  appear 
  to 
  be 
  in 
  place. 
  The 
  dips 
  of 
  the 
  limestones 
  

   are 
  very 
  gentle 
  to 
  the 
  west 
  into 
  the 
  north 
  and 
  south 
  valley 
  of 
  

   Esopus 
  creek. 
  West 
  of 
  this 
  valley 
  rise 
  steep 
  slopes 
  of 
  Hamilton 
  

   shales, 
  but 
  these 
  are 
  deeply 
  and 
  widely 
  trenched 
  by 
  the 
  northwest 
  

   and 
  southeast 
  portion 
  of 
  Esopus 
  creek. 
  

  

  Seawanottne: 
  Mountain. 
  

  

  The 
  Shawangunk 
  mountain 
  lies 
  between 
  the 
  Walkill 
  valley 
  and 
  

   the 
  southern 
  Ca 
  tskills. 
  It 
  rises 
  gradually 
  south 
  from 
  Eosendale 
  

   and 
  finally 
  attains 
  an 
  elevation 
  of 
  2200 
  feet 
  and 
  a 
  width 
  of 
  five 
  

   miles 
  east 
  of 
  Ellenville. 
  It 
  continues 
  to 
  the 
  southward 
  with 
  

   diminished 
  width 
  and 
  height 
  through 
  New 
  Jersey 
  and 
  Pennsyl- 
  

   vania. 
  In 
  these 
  States 
  it 
  is 
  known 
  as 
  the 
  Kittatining 
  or 
  Blue 
  

   mountain, 
  and 
  it 
  is 
  crossed 
  by 
  the 
  Delaware, 
  Lehigh 
  and 
  Sus- 
  

   quehanna 
  water 
  gaps. 
  

  

  The 
  well-known 
  summer 
  resorts 
  of 
  Lake 
  Mohonk 
  and 
  Lak 
  e 
  1 
  Einne- 
  

   waska 
  are 
  on 
  the 
  summit 
  of 
  the 
  Shawangunk 
  mountain 
  in 
  Ulster 
  

   county 
  so 
  that 
  the 
  region 
  has 
  become 
  familiar 
  to 
  a 
  large 
  number 
  

   of 
  visitors. 
  Unfortunately, 
  however, 
  a 
  description 
  of 
  its 
  geology 
  

   has 
  never 
  been 
  published 
  and 
  the 
  brief 
  references 
  in 
  the 
  report 
  

   of 
  Mather* 
  throw 
  but 
  little 
  light 
  on 
  the 
  subject. 
  

  

  The 
  structure 
  of 
  this 
  mountain 
  in 
  Ulster 
  county 
  is 
  a 
  particu- 
  

   larly 
  interesting 
  illustration 
  of 
  close 
  relation 
  of 
  rock 
  texture 
  to 
  

   topography, 
  for 
  the 
  presence 
  of 
  the 
  mountain 
  and 
  its 
  form 
  are 
  

   directly 
  dependent 
  on 
  the 
  structure 
  of 
  a 
  relatively 
  thin 
  sheet 
  of 
  

   hard 
  rock. 
  In 
  the 
  accompanying 
  stereographic 
  map, 
  plate 
  1 
  2, 
  

   an 
  attempt 
  has 
  been 
  made 
  to 
  represent 
  its 
  character, 
  and 
  its 
  

   structure 
  is 
  shown 
  in 
  the 
  cross-sections 
  at 
  the 
  ends 
  of 
  blocks 
  into 
  

  

  * 
  Geology 
  of 
  New 
  York; 
  Report 
  on 
  the 
  First 
  District. 
  1848. 
  

  

  