﻿77 
  

  

  3 
  NucuUtes 
  oblongatus 
  Con. 
  (it) 
  

  

  4 
  Palaeoneilo 
  sp. 
  (rr) 
  

  

  5 
  Tmtaculites 
  sp. 
  (rr) 
  

  

  6 
  A 
  small 
  Gastropod 
  (rr) 
  

  

  XXIII 
  D 
  10 
  . 
  The 
  slope 
  of 
  the 
  hill 
  is 
  then 
  covered 
  for 
  about 
  189 
  

   feet 
  and 
  overgrown 
  with 
  underbrush 
  when 
  the 
  base 
  of 
  the 
  con- 
  

   spicuous 
  rocks 
  known 
  as 
  the 
  "Oneonta 
  ledge" 
  is 
  reached 
  at 
  398 
  feet 
  

   above 
  the 
  railroad. 
  This 
  is 
  an 
  interrupted 
  and 
  broken 
  ledge 
  vary- 
  

   ing 
  in 
  thickness 
  from 
  10 
  to 
  30 
  feet 
  or 
  more, 
  composed 
  of 
  coarse 
  

   grained 
  greenish 
  gray 
  sandstone 
  that 
  forms 
  massive 
  layers- 
  Suc- 
  

   ceeding 
  this 
  is 
  a 
  covered 
  slope 
  of 
  64 
  feet 
  when 
  a 
  smaller 
  ledge 
  — 
  

   D 
  12 
  of 
  the 
  section 
  — 
  is 
  reached 
  at 
  an 
  elevation 
  of 
  492 
  feet 
  above 
  the 
  

   railroad. 
  At 
  the 
  base 
  is 
  a 
  stratum 
  of 
  coarse 
  gray 
  sandstone 
  

   capped 
  by 
  red 
  sandstone. 
  The 
  summit 
  of 
  the 
  hill 
  is 
  somewhat 
  

   higher 
  but 
  there 
  are 
  no 
  further 
  outcrops 
  of 
  rocks. 
  The 
  rocks 
  com- 
  

   posing 
  zones 
  D 
  10 
  and 
  D 
  12 
  are 
  typical 
  exposures 
  of 
  the 
  Oneonta 
  

   formation. 
  The 
  base 
  of 
  the 
  formation 
  is 
  undoubtedly 
  considerably 
  

   lower 
  and 
  concealed 
  by 
  the 
  deposit 
  of 
  drift, 
  for 
  on 
  the 
  Emmons 
  

   farm 
  about 
  four 
  miles 
  east 
  of 
  Powell 
  hill 
  the 
  base 
  of 
  the 
  Oneonta 
  

   sandstone 
  is 
  390 
  feet 
  above 
  the 
  railroad 
  level 
  and 
  on 
  the 
  south 
  

   side 
  of 
  the 
  Susquehanna 
  river 
  opposite 
  Oneonta 
  it 
  is 
  about 
  265 
  

   feet 
  above 
  the 
  level 
  of 
  the 
  Oneonta 
  railroad 
  station. 
  

  

  