﻿CLASSIFICATION, 
  ETC. 
  OP 
  HAMILTON 
  AND 
  CHEMUNG 
  SERIES 
  217 
  

  

  (O 
  2 
  ) 
  above 
  the 
  sandstones 
  are 
  fossils, 
  Spirifer 
  mesastrialis 
  Hall 
  

   being 
  abundant. 
  This 
  species 
  is 
  associated 
  with 
  some 
  others 
  and 
  

   in 
  the 
  few 
  minutes 
  spent 
  in 
  hunting 
  for 
  fossils 
  at 
  this 
  locality 
  the 
  

   following 
  list 
  was 
  obtained: 
  

  

  1 
  Spirifer 
  mesastrialis 
  Hall 
  (a) 
  

  

  2 
  Tropldoleptus 
  carinatus 
  (Con.) 
  Hall 
  (rr) 
  

  

  3 
  Camarotoechia 
  sp. 
  (r) 
  

  

  Too 
  imperfectly 
  preserved 
  for 
  specific 
  identification. 
  

  

  4 
  Goniophora 
  cf. 
  Tiamiltonensis 
  (Hall) 
  Miller 
  (rr) 
  

  

  5 
  Actmopteria 
  boydi 
  (Con.) 
  Hall 
  (rr) 
  

   In 
  the 
  massive 
  sandstones 
  below 
  the 
  f 
  ossiliferous 
  shales 
  Amni- 
  

  

  genia 
  catskillensis 
  (Van.) 
  Hall 
  occurs, 
  which 
  is 
  considered 
  the 
  

   characteristic 
  fossil 
  of 
  the 
  Oneonta 
  sandstone." 
  Below 
  the 
  mas- 
  

   sive 
  sandstones 
  on 
  the 
  hillside 
  are 
  numerous 
  loose 
  pieces 
  of 
  red 
  

   shale 
  and 
  sandstone. 
  This 
  fossiliferous 
  zone 
  is 
  some 
  600 
  feet 
  

   above 
  the 
  Schoharie 
  river 
  at 
  Gilboa 
  and 
  clearly 
  above 
  the 
  lowest 
  

   zones 
  of 
  red 
  shale 
  in 
  that 
  vicinity 
  and 
  at 
  the 
  Manorkill. 
  The 
  

   lithologic 
  character 
  and 
  fauna 
  of 
  the 
  massive, 
  greenish 
  gray 
  sand- 
  

   stones 
  (O 
  1 
  ) 
  are 
  those 
  of 
  the 
  Oneonta 
  formation, 
  while 
  the 
  shales 
  

   of 
  O 
  2 
  contain 
  an 
  Ithaca 
  fauna 
  similar 
  to 
  that 
  of 
  zones 
  A 
  2 
  and 
  A 
  4 
  

   to 
  the 
  southwest 
  of 
  Gilboa. 
  A 
  dip 
  of 
  about 
  90 
  feet 
  a 
  mile 
  to 
  

   the 
  southwest 
  would 
  carry 
  the 
  zone 
  O 
  2 
  down 
  to 
  the 
  horizon 
  of 
  

   A 
  2 
  which 
  is 
  between 
  two 
  and 
  one 
  half 
  and 
  three 
  miles 
  farther 
  

   southwest. 
  

  

  LXXV 
  X 
  2 
  . 
  An 
  interesting 
  section 
  was 
  studied 
  farther 
  northeast 
  

   on 
  the 
  Mackey 
  farm 
  to 
  the 
  west 
  of 
  the 
  Plattenkill. 
  This 
  locality 
  is 
  

   about 
  two 
  and 
  three 
  quarters 
  miles 
  northeast 
  of 
  Gilboa 
  and 
  the 
  

   Plattenkill 
  at 
  that 
  locality 
  is 
  some 
  550 
  feet 
  higher 
  than 
  the 
  

   Schoharie 
  river 
  at 
  the 
  mouth 
  of 
  the 
  creek. 
  On 
  the 
  Mackey 
  farm 
  

   140 
  feet 
  higher 
  than 
  the 
  creek 
  is 
  a 
  ledge 
  of 
  uneven 
  bedded, 
  gray- 
  

   ish 
  and 
  rather 
  coarse 
  grained 
  sandstones. 
  20 
  feet 
  higher 
  or 
  ap- 
  

   proximately 
  710 
  feet 
  above 
  the 
  Schoharie 
  river 
  are 
  thin 
  bedded, 
  

   grayish 
  sandstones 
  (X 
  2 
  ) 
  which 
  contain 
  quite 
  a 
  number 
  of 
  species, 
  

   Spirifer 
  mesastrialis 
  Hall 
  occurring 
  abundantly. 
  The 
  fauna 
  is 
  as 
  

   follows: 
  

  

  