﻿Brigham 
  — 
  Drift 
  Bowlders 
  in 
  Central 
  New 
  York. 
  219 
  

  

  the 
  Oriskany 
  sandstones. 
  These 
  bowlders 
  occur 
  at 
  all 
  altitudes 
  

   and 
  some 
  have 
  been 
  elevated 
  considerably 
  within 
  moderate 
  

   distances. 
  The 
  Oneida 
  fragments, 
  at 
  their 
  greatest 
  height 
  in 
  

   northeastern 
  Madison, 
  have 
  been 
  lifted 
  600 
  feet 
  in 
  14 
  miles, 
  if 
  

   we 
  consider 
  them 
  to 
  have 
  come 
  from 
  the 
  highest 
  point 
  in 
  the 
  

   outcrop. 
  It 
  is 
  more 
  probable 
  that 
  they 
  came 
  from 
  a 
  locality 
  

   which 
  would 
  require 
  an 
  elevation 
  of 
  800 
  feet 
  in 
  10 
  miles. 
  

  

  Scale 
  4 
  miles 
  to 
  the 
  inch. 
  Dotted 
  line 
  gives 
  the 
  base 
  of 
  main 
  valley 
  walls. 
  

   Divides 
  at 
  Waterville. 
  Bouckville 
  and 
  Pratts. 
  Oriskany 
  and 
  Helderberg 
  ledges 
  at 
  

   A. 
  Altitudes 
  of 
  L 
  and 
  U 
  approximate 
  those 
  of 
  D 
  and 
  K. 
  

  

  The 
  bowlderets 
  are 
  commonly 
  more 
  rounded 
  to 
  the 
  southward, 
  

   though 
  to 
  this 
  there 
  are 
  notable 
  exceptions, 
  perhaps 
  due 
  to 
  

   splitting 
  in 
  transit.* 
  It 
  was 
  hoped 
  that 
  Oneida 
  fragments 
  north 
  

   and 
  south 
  of 
  the 
  moraine 
  would 
  afford 
  interesting 
  comparisons 
  

   as 
  to 
  amount 
  of 
  discoloration 
  and 
  disintegration 
  since 
  the 
  

   time 
  of 
  deposit. 
  Iso 
  such 
  result 
  was 
  realized. 
  It 
  is 
  thought 
  

  

  * 
  See 
  N. 
  S. 
  Shaler, 
  Bowlder 
  Train 
  from 
  Iron 
  Bill, 
  Bull. 
  Mus. 
  Comp. 
  Zool., 
  vol. 
  

   xvi. 
  No. 
  11, 
  p. 
  199. 
  

  

  