﻿r32 
  NEW 
  YORK 
  STATE- 
  MUSEUM 
  

  

  first 
  bend 
  it 
  is 
  9° 
  S 
  30° 
  E, 
  but 
  above 
  the 
  bridge 
  all 
  the 
  beds 
  are 
  

   considerably 
  folded 
  and 
  are 
  also 
  a 
  repetition 
  of 
  the 
  beds 
  seen 
  in 
  

   the 
  gorge, 
  in 
  decreasing 
  order 
  as 
  one 
  proceeds 
  up 
  stream. 
  

  

  Hinckley. 
  An 
  isolated 
  outcrop 
  of 
  15 
  feet 
  of 
  light 
  gray, 
  rather 
  

   coarsely 
  crystalline 
  limestone, 
  alternating 
  with 
  encrinal 
  shaly 
  lime- 
  

   stone, 
  apparently 
  rather 
  high 
  Trenton, 
  occurs 
  beneath 
  the 
  bridge 
  at 
  

   HinckleVj 
  (133 
  A). 
  The 
  limestone 
  is 
  quite 
  soft, 
  with 
  numerous 
  

   more 
  or 
  less 
  comminuted 
  fossil 
  remains. 
  

   Ceraurus 
  pleurexanthemus 
  Platystrophia 
  hiforata 
  

  

  Isotelus 
  gigas 
  Dalmanella 
  testudinaria^ 
  abund- 
  

  

  ant. 
  

   Crinoidal 
  columns, 
  abundant. 
  Bryozoa 
  

  

  Above 
  this 
  the 
  river 
  flows 
  deep 
  and 
  sluggish 
  between 
  banks 
  of 
  

   black 
  mud 
  and 
  sand.** 
  

  

  Grant. 
  Opposite 
  the 
  saw-mill 
  on 
  Black 
  creek 
  in 
  the 
  town 
  of 
  

   Grant, 
  about 
  ten 
  feet 
  of 
  rather 
  low 
  Trenton 
  is 
  seen 
  (133 
  B). 
  It 
  is 
  

   impure 
  and 
  nodular 
  with 
  crinoids 
  and 
  monticuliporids. 
  Black 
  

   creek 
  above 
  this, 
  as 
  far 
  as 
  the 
  town 
  of 
  Gray, 
  shows 
  only 
  stratified 
  

   dark 
  gray 
  clay. 
  

  

  Hawkinsville. 
  From 
  Hinckley 
  to 
  Forestport 
  and 
  thence 
  to 
  

   Hawkinsville, 
  the 
  crystalline-sedimentary 
  contact 
  can 
  not 
  be 
  traced 
  

   on 
  account 
  of 
  the 
  deep 
  sand 
  deposits. 
  An 
  extensive 
  peneplane 
  at 
  

   an 
  elevation 
  of 
  1200 
  feet, 
  surrounds 
  Forestport 
  and 
  extends 
  for 
  

   miles. 
  It 
  is 
  entirely 
  of 
  sand 
  and 
  largely 
  barren 
  of 
  vegetation 
  (Brigham 
  

   '88 
  p. 
  114). 
  This 
  plateau 
  falls 
  off 
  abruptly 
  on 
  the 
  west, 
  in 
  a 
  line 
  which 
  

   the 
  canal 
  approximately 
  parallels 
  although 
  at 
  some 
  distance 
  from 
  it 
  ; 
  

   the 
  escarpment 
  of 
  its 
  edge 
  being 
  bare 
  and 
  sharply 
  defined 
  in 
  

   the 
  distance. 
  None 
  of 
  the 
  streams 
  have 
  cut 
  to 
  the 
  base 
  of 
  this 
  

   sand 
  plain. 
  

  

  On 
  a 
  small 
  stream 
  near 
  the 
  tow-path 
  bridge 
  just 
  south 
  of 
  Hawk- 
  

   insville, 
  three 
  feet 
  of 
  horizontal 
  layers 
  of 
  Trenton 
  are 
  exposed 
  

   (139 
  A). 
  These 
  contain 
  

  

  Dalmanella 
  testudinaria 
  Isotelus 
  gigas 
  

  

  Pleotanibonites 
  sericeus 
  Ceraurus 
  pleurexanthemus 
  - 
  

  

  Hafinesqui/na 
  deltoidea 
  

  

  a 
  On 
  the 
  occurrence 
  of 
  diatomaceous 
  earths 
  among 
  the 
  glacial 
  deposits 
  at 
  Hinckley, 
  see 
  

   Cox, 
  C. 
  F. 
  Trans. 
  N. 
  Y. 
  acad. 
  sci. 
  12 
  ; 
  S19-220 
  and 
  18 
  ; 
  101. 
  

  

  