﻿STRATIGRAPHIC 
  GEOLOGY 
  OF 
  THE 
  EASTERN 
  HELDERBERGS 
  

  

  33' 
  

  

  Feet 
  

  

  Parrish. 
  This 
  limestone 
  was 
  formerly 
  called 
  the 
  

   Upper 
  Pentamerus 
  but 
  recently 
  Prof. 
  Hall 
  has 
  

   named 
  it 
  the 
  Becraft 
  liniestone. 
  a 
  

  

  A 
  7 
  Grayish 
  calcareous 
  shales 
  and 
  shaly 
  limestones. 
  

   The 
  shales 
  contain 
  great 
  numbers 
  of 
  fossils 
  many 
  

   of 
  which 
  are 
  nicely 
  preserved. 
  This 
  formation 
  con- 
  

   stitutes 
  the 
  lower 
  part 
  of 
  the 
  first 
  terrace 
  to 
  the 
  

   west 
  of 
  New 
  Salem 
  and 
  has 
  the 
  most 
  gentle 
  slope 
  

   of 
  any 
  of 
  the 
  formations 
  composing 
  this 
  part 
  of 
  the 
  

   hill 
  until 
  the 
  talus 
  at 
  its 
  base 
  is 
  reached. 
  Shaly 
  

   limestone. 
  

  

  A 
  6 
  Massive 
  bluish 
  gray 
  limestone 
  forming 
  the 
  upper 
  

   part 
  of 
  the 
  conspicuous 
  cliff 
  to 
  the 
  west 
  of 
  New 
  

   Salem. 
  This 
  limestone 
  forms 
  the 
  upper 
  part 
  of 
  the 
  

   prominent 
  cliff 
  which 
  may 
  be 
  followed 
  from 
  south- 
  

   west 
  of 
  New 
  Salem 
  around 
  the 
  northeastern 
  and 
  

   northern 
  ends 
  of 
  the 
  Helderbergs 
  to 
  Altamont. 
  An 
  

   excellent 
  idea, 
  of 
  the 
  massive 
  appearance 
  of 
  this 
  lime- 
  

   stone 
  is 
  given 
  in 
  an 
  accompanying 
  plate 
  the 
  upper 
  

   part 
  of 
  which 
  shows 
  the 
  limestone 
  as 
  it 
  appears 
  on 
  

   the 
  western 
  side 
  of 
  the 
  " 
  Indian 
  Ladder" 
  road 
  at 
  the 
  

   northern 
  end 
  of 
  the 
  Helderbergs. 
  Pentamerus 
  lime- 
  

   stone. 
  

  

  A 
  8 
  Thinner 
  bedded 
  limestones 
  than 
  the 
  above 
  which 
  

   are 
  transitional 
  in 
  lithologic 
  and 
  faunal 
  characters 
  

   from 
  the 
  Pentamerus 
  to 
  the 
  Tentaculite 
  limestone. 
  

  

  A' 
  Dark 
  blue 
  thin-bedded 
  limestones, 
  the 
  layers 
  of 
  

   which 
  are 
  generally 
  from 
  one 
  to 
  three 
  inches 
  in 
  

   thickness 
  and 
  break 
  with 
  a 
  ringing 
  sound. 
  These 
  

   thin 
  limestones 
  form 
  the 
  lower 
  part 
  of 
  the 
  vertical 
  

   cliff 
  from 
  New 
  Salem 
  around 
  the 
  northern 
  end 
  of 
  

   the 
  Helderbergs 
  to 
  Altamont. 
  Tentaculite 
  lime- 
  

   stone. 
  

  

  120=583 
  

  

  50=463 
  

  

  12=413 
  

  

  34=401 
  

  

  a 
  13th 
  an. 
  rep't 
  N. 
  Y. 
  state 
  geologist, 
  p. 
  212. 
  

  

  