﻿192 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  There 
  are 
  also 
  fossils 
  in 
  bluish, 
  argillaceous 
  shales 
  occurring: 
  

   just 
  above 
  the 
  sandstone. 
  On 
  each 
  side 
  of 
  the 
  summit 
  20 
  feet 
  

   below 
  the, 
  fossiliferous 
  sandstone 
  are 
  smooth, 
  bluish 
  shales 
  

   which 
  weather 
  olive 
  and 
  some 
  grayish 
  green 
  flagging 
  stone 
  in 
  

   which 
  fossils 
  were 
  not 
  found. 
  This 
  fossiliferous 
  zone 
  is 
  re- 
  

   garded 
  as 
  indicating 
  the 
  appearance 
  of 
  the 
  Ithaca 
  fauna, 
  suc- 
  

   ceeding 
  the 
  barren 
  sandstones 
  and 
  shales 
  of 
  the 
  Sherburne 
  forma- 
  

   tion 
  and 
  it 
  is 
  referred 
  to 
  the 
  Ithaca 
  formation 
  although 
  the- 
  

   hasty 
  search 
  for 
  fossils 
  did 
  not 
  yield 
  specimens, 
  of 
  Spirifer 
  

   mesastrialis 
  Hall. 
  The 
  list 
  of 
  fossils 
  is 
  as 
  follows: 
  

  

  1 
  Spirifer 
  mucronatus 
  (Con.) 
  Bill. 
  (c) 
  

  

  2 
  S. 
  tullius 
  Hall 
  (r) 
  

  

  3 
  Tropidoleptus 
  carinatus 
  (Con.) 
  Hall 
  (r) 
  

  

  4 
  Microdon 
  (Gypricardella) 
  bellistriatus 
  Con. 
  (rr) 
  

  

  5 
  M. 
  (C. 
  ) 
  gregarius 
  Hall 
  (rr) 
  

  

  6 
  Sphenotus 
  cuneatus 
  (Con.) 
  Hall 
  (rr) 
  

  

  7 
  Schizodus 
  appressus 
  (Con.) 
  Hall 
  (rr) 
  

   On 
  the 
  south 
  side 
  of 
  the 
  road 
  farther 
  east 
  near 
  the 
  Summit- 
  

   Fulton 
  township 
  line 
  along 
  the 
  upper 
  course 
  of 
  one 
  of 
  the 
  

   branches 
  of 
  the 
  Westkill 
  are 
  coarse, 
  grayish 
  sandstone 
  and 
  

   thinner 
  blue 
  shales 
  (C 
  8 
  — 
  ). 
  This 
  ledge 
  is 
  140 
  feet 
  lower 
  than 
  

   the 
  fossiliferous 
  zone 
  of 
  C 
  8 
  and 
  is 
  propably 
  near 
  the 
  top 
  of 
  the 
  

   Hamilton. 
  Fossils 
  occur 
  rather 
  sparingly, 
  the 
  three 
  following 
  

   species 
  having 
  been 
  collected 
  during 
  a 
  few 
  minutes 
  search: 
  

  

  1 
  Tropidoleptus 
  carinatus 
  (Con.) 
  Hall 
  (r) 
  

  

  2 
  Spirifer 
  sp. 
  ( 
  rr 
  ) 
  

  

  Fragments. 
  

  

  3 
  Nuculites 
  oblongatus 
  Con. 
  (rr) 
  

  

  Large 
  specimen. 
  — 
  35 
  mm 
  long 
  and 
  19 
  high. 
  

  

  On 
  the 
  western 
  side 
  of 
  the 
  divide 
  going 
  down 
  into 
  the 
  second 
  

   valley, 
  sandstone 
  and 
  coarse 
  shales 
  containing 
  abundant 
  Hamil- 
  

   ton 
  fossils 
  were 
  found 
  120 
  feet 
  below 
  the 
  zone 
  C 
  8 
  . 
  Between 
  the 
  

   two 
  fossiliferous 
  zones 
  are 
  exposures 
  of 
  sandstones 
  and 
  smooth 
  

   bluish 
  to 
  olive 
  shales 
  which 
  closely 
  resemble, 
  lithologically, 
  those 
  

   of 
  the 
  typical 
  Sherburne 
  formation. 
  To 
  the 
  north 
  of 
  the 
  road 
  

   and 
  northeast 
  of 
  Summit 
  is 
  a 
  high, 
  rounded 
  hill, 
  known 
  as 
  Cob- 
  

   ble 
  hill, 
  on 
  which 
  are 
  plenty 
  of 
  these 
  fine 
  shales, 
  the 
  Sherburne 
  

   formation 
  apparently 
  capping 
  the 
  hill. 
  

  

  The 
  section 
  described 
  above 
  may 
  be 
  represented 
  diagrammatic- 
  

   ally 
  in 
  the 
  following 
  manner: 
  

  

  