﻿Report 
  of 
  the 
  State 
  Geologist. 
  405 
  

  

  small 
  area 
  in 
  greater 
  part 
  associated 
  with 
  gravel 
  streaks. 
  

   Near 
  the 
  Catskill, 
  Davis 
  describes 
  a 
  six-inch 
  layer 
  lying 
  

   on 
  the 
  Helderberg 
  formation, 
  consisting 
  of 
  limestone 
  pebbles 
  

   up 
  to 
  an 
  inch 
  in 
  diameter, 
  intermixed 
  with 
  coarse 
  quartz 
  grains, 
  

   which 
  he 
  considers 
  Oriskany. 
  West 
  of 
  Sanger 
  lies, 
  on 
  the 
  road 
  

   to 
  Quarry 
  ville, 
  the 
  Oriskany 
  is 
  represented 
  by 
  a 
  six 
  to 
  eight 
  foot 
  

   bed 
  of 
  dark 
  quartzite, 
  with 
  calcareous 
  layers 
  exhibiting 
  fossils, 
  

   and 
  this 
  bed 
  is 
  also 
  seen 
  with 
  somewhat 
  diminished 
  thickness 
  

   along 
  Esopus 
  creek 
  toward 
  Glenerie. 
  From 
  here 
  southward 
  

   the 
  formation 
  appears 
  to 
  be 
  continuous 
  and 
  its 
  thickness 
  

   increases. 
  Davis 
  reports 
  about 
  Kingston 
  twenty 
  to 
  thirty 
  feet 
  

   of 
  Oriskany, 
  consisting 
  of 
  an 
  unfossilif 
  erous 
  lower 
  member, 
  in 
  

   places 
  absent, 
  of 
  white 
  quartz 
  sand 
  in 
  part 
  a 
  quartzite, 
  but 
  

   " 
  sometimes 
  loosely 
  built 
  of 
  subangular 
  white 
  pebbles 
  up 
  to 
  an 
  

   inch 
  in 
  diameter," 
  and 
  an 
  upper 
  member 
  of 
  fossiliferous 
  white 
  

   grit. 
  I 
  could 
  not 
  find 
  so 
  great 
  a 
  thickness, 
  but 
  my 
  observations 
  

   in 
  this 
  vicinity 
  were 
  not 
  extensive. 
  

  

  Along 
  the 
  Wallkill 
  Valley 
  railroad 
  the 
  Oriskany 
  is 
  exposed 
  for 
  

   several 
  miles 
  north 
  from 
  Whiteport, 
  and 
  consists 
  of 
  a 
  calcareous 
  

   sandrock 
  merging 
  into 
  dark 
  quartzite, 
  the 
  former 
  exhibiting 
  

   abundant 
  fossds 
  in 
  its 
  weathered 
  portions. 
  

  

  Just 
  south 
  of 
  Gottekill 
  the 
  formation 
  is 
  a 
  dark-blue, 
  fine- 
  

   grained 
  silicious 
  limestone 
  four 
  or 
  five 
  feet 
  in 
  thickness 
  and 
  

   moderately 
  fossiliferous. 
  Its 
  character 
  is 
  similar 
  along 
  the 
  east- 
  

   ern 
  slope 
  of 
  Stone 
  Ridge, 
  where 
  I 
  observed 
  it 
  at 
  several 
  points. 
  

   The 
  last 
  exposure 
  I 
  saw 
  southward 
  was 
  a 
  half 
  mile 
  north 
  of 
  

   Wawarsing, 
  where 
  it 
  was 
  a 
  dark-gray, 
  silicious 
  limestone 
  ten 
  to 
  

   fifteen 
  feet 
  in 
  thickness. 
  

  

  The 
  Oriskany 
  formation 
  has 
  recently 
  been 
  described 
  by 
  

   Beecher 
  and 
  Clarke 
  on 
  Becraft 
  mountain, 
  south 
  of 
  the 
  city 
  of 
  

   Hudson, 
  where 
  it 
  consists 
  of 
  a 
  few 
  feet 
  of 
  arenaceous 
  limestone, 
  

   presenting 
  the 
  usual 
  physical 
  features 
  and 
  carrying 
  an 
  interesting 
  

   fauna.* 
  

  

  Helderberg 
  limestones. 
  — 
  The 
  members 
  comprised 
  under 
  this 
  

   name 
  are 
  upper 
  Shaly 
  beds, 
  the 
  Scutella 
  or 
  upper 
  Pentamerus 
  

   beds, 
  the 
  lower 
  Shaly 
  beds, 
  the 
  Pentamerus 
  beds 
  and 
  the 
  Tentac- 
  

  

  ♦Notice 
  of 
  a 
  new 
  lower 
  Oriskany 
  fauna 
  in 
  Columbia 
  county, 
  New 
  York. 
  Am. 
  Jour. 
  Sci., 
  3d 
  

   series, 
  vol. 
  44, 
  pp. 
  410-18. 
  1892. 
  

  

  