﻿LIMESTONES 
  OF 
  NEW 
  YORK 
  AND 
  THEIR 
  ECONOMIC 
  VALUE 
  359 
  

  

  Falls 
  the 
  rock 
  in 
  this 
  belt 
  is 
  usually 
  very 
  siliceous 
  and 
  is 
  known 
  as 
  

   sandrock. 
  * 
  

  

  In 
  Herkimer, 
  Fulton, 
  Saratoga 
  and 
  Montgomery 
  counties 
  this 
  

   formation 
  underlies 
  a 
  considerable 
  area 
  and 
  often 
  forms 
  cliffs 
  

   along 
  the 
  rivers 
  and 
  creeks. 
  Its 
  normal 
  character 
  is 
  fairly 
  con- 
  

   stant, 
  viz, 
  a 
  light 
  bluish 
  gray, 
  fine 
  grained, 
  massive 
  bedded 
  

   sandy 
  limestone. 
  The 
  weathered 
  surfaces 
  are 
  generally 
  a 
  dirty 
  

   buff. 
  The 
  following 
  localities 
  are 
  noted 
  by 
  N. 
  H. 
  Darton 
  as 
  

   affording 
  good 
  exposures 
  : 
  a 
  

  

  About 
  Middleville, 
  Littlefalls 
  and 
  northwestward 
  along 
  the 
  

   fault 
  scarp, 
  on 
  East 
  Canada 
  creek, 
  about 
  St 
  Johnsville, 
  along 
  

   the 
  Mohawk 
  from 
  Canajoharie 
  to 
  the 
  " 
  Noses 
  " 
  the 
  quarries 
  at 
  

   Tribeshill 
  along 
  the 
  Mohawk 
  from 
  Amsterdam 
  to 
  Hoffmans, 
  also 
  

   in 
  southwestern 
  Saratoga 
  co. 
  and 
  west 
  of 
  Saratoga 
  Springs. 
  

  

  According 
  to 
  Walcott 
  6 
  the 
  section 
  of 
  Calciferous 
  near 
  Sara- 
  

   toga 
  involves 
  : 
  

  

  Massive 
  layers 
  of 
  steel 
  gray, 
  more 
  or 
  less 
  arenaceous 
  

  

  limestone 
  125 
  feet 
  

  

  Massive 
  bedded, 
  slightly 
  magnesian, 
  gray 
  and 
  dove 
  

   colored 
  limestone 
  35 
  

  

  Unfossiliferous, 
  impure, 
  compact, 
  more 
  or 
  less 
  siliceous 
  

   limestone 
  95 
  

  

  Dark 
  gray, 
  even 
  bedded 
  limestone. 
  50 
  

  

  Oolitic 
  limestone 
  . 
  30 
  

  

  Trenton. 
  The 
  Trenton 
  limestones 
  involve 
  several 
  different 
  

   members, 
  viz, 
  Birdseye, 
  Black 
  river 
  and 
  Trenton, 
  the 
  latter 
  being 
  

   the 
  upper 
  one. 
  

  

  The 
  most 
  southern 
  area 
  is 
  a 
  small 
  patch 
  of 
  impure, 
  fossili- 
  

   ferous 
  limestone 
  along 
  the 
  river 
  road 
  four 
  miles 
  north 
  of 
  New- 
  

   burgh. 
  

  

  An 
  important 
  belt 
  extends 
  southward 
  along 
  the 
  Champlain 
  

   valley, 
  then 
  along 
  the 
  Mohawk 
  to 
  Littlefalls 
  and 
  thence 
  north- 
  

   westward 
  to 
  Watertown. 
  Beds 
  of 
  the 
  same 
  age 
  also 
  occur 
  east 
  

   of 
  Lake 
  Champlain 
  and 
  extend 
  southward 
  into 
  Washington 
  co. 
  

  

  a 
  13th 
  Rep't 
  N. 
  Y. 
  state 
  geol. 
  1893, 
  p. 
  418. 
  

   fcBull. 
  no. 
  81, 
  U. 
  S. 
  geol. 
  survey, 
  p. 
  346. 
  

  

  