﻿Report 
  of 
  the 
  State 
  Geologist. 
  501 
  

  

  amounts 
  vary 
  considerably. 
  At 
  High 
  Falls 
  the 
  upper 
  bed 
  is 
  

   fifteen 
  feet 
  thick, 
  the 
  lower 
  bed 
  five 
  feet 
  thick 
  with 
  three 
  feet 
  of 
  

   intervening 
  waterlime 
  beds. 
  The 
  High 
  Falls 
  are 
  over 
  the 
  thicker 
  

   bed 
  as 
  is 
  shown 
  in 
  the 
  plates. 
  Cement 
  ma} 
  7 
  be 
  looked 
  for 
  in 
  the 
  

   upper 
  Rondout 
  valley, 
  from 
  Port 
  Jackson 
  by 
  Ellen 
  ville, 
  but 
  

   owing 
  to 
  absence 
  of 
  outcrops 
  this 
  should 
  only 
  be 
  regarded 
  as 
  a 
  

   suggestion. 
  

  

  The 
  Coralline 
  limestone 
  (JYiagar 
  a 
  limestone). 
  — 
  This 
  is 
  a 
  thin 
  bed 
  

   of 
  dark-gray 
  limestone 
  which 
  underlies 
  the 
  cement 
  at 
  Rondout 
  and 
  

   for 
  a 
  short 
  distance 
  northward. 
  In 
  the 
  Rondout 
  quarries 
  its 
  thick- 
  

   ness 
  is 
  about 
  seven 
  feet. 
  At 
  the 
  entrance 
  to 
  the 
  quarries 
  in 
  Becraf 
  t 
  

   limestone, 
  a 
  mile 
  north 
  of 
  East 
  Kingston, 
  it 
  is 
  seen 
  to 
  have 
  thinned 
  

   to 
  five 
  inches. 
  To 
  the 
  northward 
  there 
  are 
  no 
  exposures 
  of 
  this 
  

   horizon 
  except 
  near 
  the 
  railroad 
  north 
  of 
  West 
  Camp 
  station, 
  

   where 
  the 
  member 
  is 
  seen 
  with 
  the 
  thickness 
  of 
  three 
  feet. 
  South 
  

   of 
  Rondout, 
  in 
  the 
  Whiteport 
  and 
  Rosendale 
  regions, 
  it 
  is 
  absent 
  

   for 
  the 
  cement 
  is 
  seen 
  lying 
  directly 
  on 
  the 
  surface 
  of 
  sandstones 
  of 
  

   greater 
  age. 
  The 
  corals 
  in 
  this 
  limestone 
  are 
  of 
  Magara 
  age, 
  as 
  

   Dr. 
  James 
  Hall 
  has 
  long 
  ago 
  shown, 
  and 
  this 
  thin 
  bed 
  is 
  the 
  

   attenuated 
  southeastern 
  extension 
  of 
  the 
  great 
  limestone 
  series 
  

   which 
  gives 
  rise 
  to 
  the 
  Falls 
  of 
  Niagara. 
  

  

  Clinton 
  and 
  Medina 
  formations. 
  — 
  The 
  beds 
  which 
  are 
  thought 
  

   to 
  represent 
  these 
  horizons 
  begin 
  a 
  few 
  miles 
  south 
  of 
  Kingston 
  

   and 
  extend 
  through 
  the 
  Whiteport-Rosendale 
  cement 
  region 
  

   and 
  up 
  the 
  Rondout 
  Creek 
  valley 
  to 
  Homowack. 
  They 
  present 
  

   considerable 
  diversity 
  in 
  character. 
  The 
  lower 
  member 
  is 
  red 
  or 
  

   reddish 
  shale 
  throughout, 
  but 
  the 
  upper 
  beds 
  vary 
  from 
  quartzite 
  

   northward 
  to 
  shaly 
  and 
  calcareous 
  beds 
  southward. 
  

  

  The 
  formation 
  comes 
  in 
  between 
  the 
  waterlime 
  and 
  Hudson 
  

   river 
  slates 
  along 
  the 
  base 
  of 
  the 
  ridge, 
  about 
  midway 
  between 
  

   Wilbur 
  and 
  Eddyville, 
  and 
  thickens 
  gradually 
  to 
  the 
  average 
  of 
  

   about 
  forty 
  feet 
  in 
  the 
  next 
  five 
  miles. 
  The 
  upper 
  member 
  of 
  

   white 
  or 
  gray, 
  thin-bedded 
  quartzite 
  begins 
  first 
  and 
  is 
  followed 
  in 
  

   a 
  couple 
  of 
  miles 
  by 
  an 
  underlying 
  series 
  of 
  hard 
  shales 
  varying 
  

   in 
  color 
  from 
  dull 
  red 
  to 
  brown. 
  These 
  two 
  members 
  preserve 
  

   their 
  distinctive 
  characters 
  to 
  some 
  distance 
  beyond 
  Rosendale, 
  

   where 
  the 
  quartzite 
  gives 
  place 
  to 
  argillaceous 
  and 
  calcareous 
  

   sediments. 
  

  

  