﻿STRATIGRAPHIC 
  GEOLOGY 
  OF 
  THE 
  EASTERN 
  HELDERBERGS 
  345 
  

  

  sandstone"; 
  and 
  a 
  section 
  by 
  Mr 
  John 
  Gebbard 
  which 
  Mr 
  Conrad 
  

   quotes 
  on 
  the 
  same 
  page. 
  No. 
  16 
  is 
  Esopus 
  shale 
  or 
  Cauda-galli 
  

   grit 
  and 
  no. 
  17 
  is 
  the 
  Onondaga 
  limestone, 
  for 
  Pileopsis 
  tubifer= 
  

   Platyceras 
  dumosum 
  1 
  is 
  not 
  found 
  in 
  any 
  other 
  formation 
  except 
  

   perhaps 
  the 
  Schoharie 
  grit. 
  The 
  fossils 
  named 
  by 
  Mr 
  Conrad 
  for 
  

   no. 
  18, 
  " 
  The 
  sandstone 
  of 
  Clarksville 
  " 
  leave 
  no 
  doubt 
  that 
  this 
  

   formation 
  is 
  the 
  Schoharie 
  grit. 
  Calymene 
  platys 
  is 
  characteristic 
  

   of 
  the 
  Schoharie. 
  The 
  Orthoceras 
  may 
  be 
  any 
  one 
  of 
  the 
  numer- 
  

   ous 
  large 
  species 
  contained 
  in 
  this 
  formation 
  and 
  it 
  seems 
  to 
  be 
  

   implied 
  that 
  Pterinea 
  (bilobite) 
  and 
  Conocardium 
  cimeus 
  are 
  the 
  

   same, 
  Conocardium 
  cuneus 
  being 
  characteristic 
  of 
  the 
  Schoharie 
  

   grit. 
  The 
  question 
  remains 
  why 
  did 
  Mr 
  Conrad 
  commit 
  the 
  error 
  

   of 
  putting 
  the 
  sandstone 
  of 
  Clarksville 
  above 
  the 
  limestone 
  in- 
  

   stead 
  of 
  below 
  it? 
  Above 
  the 
  " 
  sandstone 
  and 
  limestone 
  of 
  

   Clarksville," 
  Mr 
  Conrad 
  placed 
  the 
  Oriskany, 
  no. 
  19, 
  and 
  the 
  Om 
  

   ondaga, 
  no. 
  20. 
  This 
  may 
  probably 
  be 
  explained 
  by 
  the 
  fact 
  that 
  

   Mr 
  Conrad 
  did 
  not 
  recognize 
  the 
  Oriskany 
  at 
  Clarksville 
  for 
  it 
  

   is 
  only 
  about 
  one 
  foot 
  thick 
  and 
  very 
  sparingly 
  exposed, 
  and 
  if 
  

   seen 
  it 
  might 
  have 
  been 
  taken 
  for 
  the 
  lower 
  layer 
  of 
  the 
  Esopus 
  

   shale 
  as 
  the 
  Oriskany 
  has 
  the 
  same 
  general 
  color 
  and 
  the 
  upper 
  

   surface 
  is 
  covered 
  with 
  marks 
  of 
  the 
  Spirophyton 
  cauda-galli. 
  

   And 
  he 
  did 
  not 
  -correlate 
  the 
  limestone 
  of 
  Clarksville 
  with 
  the 
  

   Onondaga 
  limestone 
  which 
  is 
  found 
  resting 
  on 
  the 
  Oriskany 
  west 
  

   of 
  Oneida 
  co. 
  

  

  Prof. 
  Emmons 
  in 
  his 
  agricultural 
  report 
  frequently 
  men- 
  

   tions 
  a 
  Mr 
  Clark 
  of 
  New 
  Scotland. 
  New 
  Scotland 
  as 
  used 
  here 
  

   does 
  not 
  refer 
  to 
  the 
  village 
  of 
  that 
  name 
  but 
  to 
  the 
  township. 
  

   The 
  description 
  which 
  Prof. 
  Emmons 
  gives 
  of 
  the 
  country 
  about 
  

   Mr 
  Clark's 
  leads 
  the 
  writer 
  to 
  believe 
  that 
  it 
  was 
  the 
  present 
  

   village 
  of 
  Clarksville 
  and 
  that 
  the 
  gentleman 
  was 
  Mr 
  Adam 
  

   Clark, 
  from 
  whom 
  the 
  place 
  takes 
  its 
  name. 
  At 
  the 
  time 
  that 
  

   Prof, 
  Emmons's 
  report 
  was 
  written 
  the 
  villages 
  of 
  Clarksville 
  and 
  

   New 
  Scotland 
  did 
  not 
  exist. 
  The 
  report 
  contains 
  a 
  picture 
  of 
  the 
  

   lower 
  end 
  of 
  the 
  gorge 
  through 
  the 
  Esopus 
  shales 
  below 
  the 
  

  

  a 
  3d 
  an. 
  rep't 
  T. 
  A. 
  Conrad, 
  pajaentologist 
  N. 
  Y. 
  state 
  geol. 
  survey, 
  1840. 
  p. 
  203. 
  

  

  hlbid, 
  p. 
  205. 
  

  

  (Ibid, 
  p. 
  207. 
  ; 
  

  

  