﻿422 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  on 
  which 
  they 
  were 
  based 
  were 
  satisfactory, 
  there 
  is 
  always 
  a 
  

   considerable 
  range 
  for 
  error 
  in 
  aneroid 
  estimates. 
  

  

  Fig. 
  5.— 
  Section 
  from 
  near 
  Gallupville 
  across 
  the 
  Helderberg 
  escarpment. 
  H., 
  Hamilton; 
  

   On., 
  Onondaga 
  limestone; 
  CO, 
  Esopus 
  shale; 
  O., 
  Oriskany; 
  S., 
  Becraft 
  limestone; 
  P., 
  Penta- 
  

   merus 
  limestone; 
  T., 
  Tentaculite 
  limestone 
  and 
  Salina 
  waterlime; 
  HR., 
  Hudson 
  River 
  forma- 
  

   tion. 
  Scale, 
  vertical, 
  3,400 
  feet 
  to 
  one 
  inch; 
  horizontal, 
  one 
  and 
  three-quarter 
  miles 
  to 
  one 
  inch. 
  

   Looking 
  west. 
  

  

  Thence 
  southward 
  the 
  Helderberg 
  and 
  associated 
  formations 
  

   are 
  flexed 
  in 
  true 
  Appalachian 
  type, 
  in 
  a 
  succession 
  of 
  parallel 
  

   flexures 
  extending 
  north 
  and 
  south 
  for 
  long 
  distances. 
  The 
  

   inclinations 
  of 
  the 
  strata 
  are 
  in 
  larger 
  part 
  steep 
  and 
  the 
  axes 
  of 
  

   folds 
  are 
  generally 
  overturned 
  to 
  the 
  west. 
  The 
  flexures 
  give 
  

   rise 
  to 
  a 
  series 
  of 
  ridges 
  predominantly 
  synclinal 
  but 
  not 
  infre- 
  

   quently 
  anticlinal. 
  

  

  Kespectf 
  ully 
  yours, 
  

  

  JST. 
  H. 
  DAKTOK 
  

  

  