﻿86 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  19 
  Leptodesma 
  rogersi 
  Hall 
  (c) 
  

  

  20 
  Actinopteria 
  theta 
  Hall 
  (?) 
  (rr) 
  

  

  21 
  Liopteria 
  sp. 
  (it) 
  

  

  22 
  Pleurotomaria 
  sulcomarginata 
  Con. 
  (c) 
  

  

  23 
  Bellerophon 
  rudis 
  Hall 
  (?) 
  (rr) 
  

  

  24 
  Orthoceras 
  sp. 
  (rr) 
  

   It 
  will 
  be 
  seen 
  that 
  the 
  above 
  fauna 
  corresponds 
  to 
  that 
  of 
  the 
  

  

  bluish 
  shales 
  in 
  the 
  vicinity 
  of 
  Oneonta 
  and 
  these 
  rocks 
  belong 
  in 
  

   the 
  Ithaca 
  formation, 
  as 
  well 
  as 
  those 
  occurring 
  by 
  the 
  roadside 
  

   and 
  along 
  the 
  stream 
  till 
  the 
  upper 
  part 
  of 
  the 
  glen, 
  which 
  crosses 
  

   the 
  township 
  line 
  in 
  the 
  northeast 
  corner 
  of 
  Otego 
  township, 
  is 
  

   reached 
  230 
  feet 
  above 
  the 
  base 
  of 
  the 
  shales 
  forming 
  E 
  1 
  . 
  

  

  Otego 
  

  

  To 
  the 
  west 
  of 
  Oneonta 
  is 
  Otego 
  township, 
  the 
  southern 
  part 
  of 
  

   which 
  is. 
  in 
  the 
  Susquehanna 
  river 
  valley. 
  The 
  central 
  part 
  is 
  

   crossed 
  by 
  the 
  Otsdawa 
  creek, 
  which 
  enters 
  the 
  Susquehanna 
  river 
  

   in 
  tlie 
  vicinity 
  of 
  Otego 
  village, 
  and 
  in 
  the 
  northern 
  and 
  western 
  

   parts 
  and 
  on 
  the 
  south 
  side 
  of 
  the 
  Susquehanna 
  river 
  are 
  high 
  hills. 
  

   A 
  large 
  part 
  of 
  the 
  township 
  is 
  covered 
  by 
  the 
  Oneonta 
  formation 
  

   while 
  the 
  Ithaca 
  formation 
  extends 
  along 
  the 
  Susquehanna 
  river- 
  

   valley 
  to 
  the 
  southwest 
  of 
  Otego 
  village, 
  and 
  the 
  high 
  land 
  in 
  the 
  

   western 
  part 
  of 
  the 
  township 
  belongs 
  in 
  the 
  Chemung 
  formation. 
  

  

  Ithaca 
  formation. 
  LXXI 
  C 
  1 
  . 
  In 
  the 
  eastern 
  part 
  of 
  the 
  town- 
  

   ship 
  are 
  exposures 
  of 
  rocks 
  along 
  Mill 
  creek 
  to 
  the 
  north 
  of 
  the 
  

   river 
  road 
  about 
  two 
  and 
  one 
  half 
  miles 
  east 
  of 
  Otego. 
  At 
  the 
  

   foot 
  of 
  the 
  gorge 
  are 
  about 
  eight 
  feet 
  of 
  bluish 
  shales' 
  which 
  

   weather 
  to 
  a 
  slightly 
  greenish 
  tint, 
  and 
  contain 
  some 
  concretions 
  

   and 
  a 
  few 
  fossils, 
  mostly 
  very 
  imperfectly 
  preserved. 
  

  

  LXXI 
  C 
  2 
  . 
  Above 
  the 
  shales 
  is 
  a 
  sandstone 
  stratum 
  two 
  feet 
  

   thick. 
  This 
  is 
  succeeded 
  by 
  another 
  two 
  foot 
  layer 
  of 
  very 
  irregu- 
  

   lar 
  structure 
  which, 
  in 
  places, 
  is 
  composed 
  almost 
  entirely 
  of 
  con- 
  

   cretions. 
  Above 
  are 
  more 
  sandstones, 
  some 
  of 
  which 
  are 
  slightly 
  

   calcareous 
  land 
  about 
  16 
  feet 
  above 
  the 
  concretionary 
  one 
  is 
  a 
  

   strongly 
  calcareous 
  stratum. 
  The 
  sandstones 
  are 
  about 
  22 
  feet 
  

   thick, 
  above 
  which 
  are 
  argillaceous 
  shales 
  containing 
  fossils 
  

  

  