﻿Report 
  of 
  the 
  State 
  Geologist. 
  41 
  1 
  

  

  limestone 
  beds, 
  then 
  another 
  cement 
  bed 
  eleven 
  feet 
  in 
  thickness. 
  

   Above 
  these 
  are 
  the 
  Tentaculite 
  and 
  Pentamerus 
  beds. 
  

   Throughout 
  the 
  Rosendale 
  region 
  the 
  local 
  cement 
  bed 
  lies 
  con- 
  

   formably 
  [?] 
  on 
  a 
  floor 
  of 
  quartzite 
  of 
  Clinton 
  age 
  and 
  it 
  is 
  

   unusually 
  sandy 
  for 
  the 
  first 
  few 
  inches 
  above. 
  In 
  the 
  following 
  

   figure 
  the 
  relations 
  of 
  these 
  beds 
  are 
  shown. 
  

  

  These 
  cement 
  beds 
  with 
  some 
  variations 
  in 
  thickness, 
  and 
  many 
  

   in 
  character, 
  extend 
  over 
  a 
  wide 
  area 
  from 
  north 
  of 
  Whiteport 
  

   through 
  Rosendale 
  to 
  beyond 
  High 
  Falls, 
  outcropping 
  in 
  a 
  belt 
  

   about 
  eight 
  miles 
  in 
  length 
  by 
  two 
  and 
  a 
  half 
  in 
  width. 
  At 
  

   High 
  Falls 
  there 
  is 
  an 
  upper 
  bed 
  of 
  cement 
  fifteen 
  feet 
  thick 
  and 
  

   a 
  lower 
  bed 
  five 
  feet 
  thick 
  separated 
  by 
  three 
  feet 
  of 
  impure 
  

   limestone. 
  At 
  Whiteport 
  the 
  upper 
  cement 
  is 
  twelve 
  feet 
  thick, 
  

   the 
  lower 
  from 
  fifteen 
  to 
  twenty 
  and 
  the 
  intervening 
  limestone 
  

   ten 
  feet 
  in 
  thickness. 
  How 
  far 
  they 
  may 
  extend 
  under 
  the 
  over- 
  

   lying 
  rocks 
  to 
  the 
  westward 
  is 
  not 
  known 
  and 
  their 
  southern 
  

   termination 
  has 
  not 
  been 
  explored. 
  To 
  the 
  northeast 
  the 
  cement 
  

   thins 
  out 
  rapidly 
  and 
  gives 
  place 
  to 
  impure 
  cements 
  and 
  lime- 
  

   stones, 
  but 
  it 
  thickens 
  again 
  rapidly 
  in 
  the 
  Rondout 
  region. 
  At 
  

   Rondout 
  there 
  are 
  two 
  cement 
  beds, 
  the 
  lower 
  twenty 
  -two 
  feet 
  

   thick 
  and 
  the 
  upper 
  five 
  feet 
  thick 
  with 
  three 
  feet 
  of 
  mixed 
  

   limestone 
  and 
  cement 
  intervening. 
  Northward 
  the 
  lower 
  cement 
  

   bed 
  thins 
  gradually 
  and 
  the 
  intervening 
  limestone 
  and 
  the 
  upper 
  

   cement 
  thicken. 
  North 
  of 
  East 
  Kingston 
  the 
  cement 
  beds 
  

   become 
  interstratified 
  with 
  limestone 
  and 
  give 
  place 
  to 
  thin 
  inter- 
  

   beddings 
  of 
  limestone 
  and 
  waterlime 
  beds. 
  

  

  Near 
  Saugerties, 
  Catskill, 
  Coxsackie 
  and 
  South 
  Bethlehem 
  the 
  

   formation 
  is 
  exposed 
  at 
  a 
  number 
  of 
  points 
  but 
  no 
  beds 
  of 
  cement 
  

   are 
  known 
  to 
  exist 
  in 
  it. 
  Its 
  thickness 
  in 
  this 
  region 
  varies 
  from 
  

   thirty-five 
  to 
  fifteen 
  feet, 
  and 
  decreases 
  northward. 
  In 
  the 
  

   Helderberg 
  mountains 
  the 
  entire 
  thickness 
  of 
  the 
  calcareous 
  

   strata 
  below 
  the 
  Pentamerus 
  beds 
  is 
  only 
  thirty 
  feet, 
  which 
  con- 
  

   sist 
  in 
  greater 
  part 
  of 
  Tentaculite 
  beds, 
  with 
  a 
  few 
  feet 
  of 
  Salina 
  

   beds 
  at 
  the 
  base. 
  The 
  thickness 
  is 
  much 
  greater 
  south 
  of 
  

   Quaker 
  Street 
  where 
  cement 
  beds 
  are 
  reported. 
  About 
  Scho- 
  

   harie 
  the 
  thickness 
  is 
  thirty 
  feet 
  but 
  no 
  important 
  cement 
  beds 
  

   have 
  been 
  worked 
  for 
  the 
  market. 
  At 
  Howe's 
  Cave 
  the 
  thickness 
  

   is 
  forty 
  feet 
  and 
  at 
  the 
  base 
  there 
  is 
  a 
  six-foot 
  bed 
  of 
  cement 
  

   which 
  is 
  worked 
  for 
  the 
  market 
  . 
  

  

  