﻿GEOLOGICAL 
  SURVEY 
  OF 
  THE 
  STATE 
  OF 
  NEW 
  YORK. 
  

  

  (GEOLOGICAL 
  MAP.) 
  

  

  Geology 
  of 
  the 
  Mohawk 
  Valley 
  in 
  Herkimer, 
  

   Fulton, 
  Montgomery 
  and 
  Saratoga 
  Counties. 
  

  

  By 
  N. 
  H. 
  DARTON 
  

  

  Contents: 
  Stratigraphy. 
  — 
  Potsdam 
  sandstone; 
  Calciferous, 
  Birdseye, 
  

   Black 
  River 
  and 
  Trenton 
  limestones; 
  Utica 
  slate. 
  

  

  James 
  Hall, 
  State 
  Geologist 
  : 
  

  

  Sir. 
  — 
  This 
  report 
  is 
  an 
  account 
  of 
  studies 
  made 
  during 
  the 
  

   summer 
  of 
  1893, 
  of 
  the 
  geology 
  of 
  the 
  Mohawk 
  valley 
  in 
  the 
  

   counties 
  above 
  named. 
  The 
  purpose 
  of 
  the 
  work 
  was 
  to 
  deter- 
  

   mine 
  the 
  distribution 
  of 
  the 
  formations 
  for 
  the 
  geological 
  map 
  of 
  

   the 
  State 
  on 
  a 
  scale 
  of 
  five 
  miles 
  to 
  the 
  inch. 
  

  

  Stratigraphy. 
  

  

  Yanuxem 
  has 
  described 
  the 
  stratigraphy 
  of 
  the 
  Mohawk 
  valley 
  

   at 
  considerable 
  length 
  and 
  I 
  have 
  but 
  little 
  additional 
  data 
  for 
  

   this 
  region, 
  except 
  as 
  to 
  certain 
  local 
  details. 
  For 
  the 
  region 
  

   northward 
  there 
  is 
  but 
  little 
  information 
  on 
  record, 
  excepting 
  

   the 
  stratigraphy 
  of 
  the 
  vicinity 
  of 
  Saratoga 
  Springs,- 
  which 
  has 
  

   been 
  described 
  by 
  Walcott. 
  The 
  Mohawk 
  and 
  Saratoga 
  sections, 
  

   however, 
  comprise 
  the 
  principal 
  stratigraphic 
  components 
  of 
  the 
  

   region 
  to 
  which 
  this 
  paper 
  relates. 
  This 
  chapter 
  may 
  be 
  con- 
  

   sidered 
  a 
  resume 
  extended 
  somewhat 
  by 
  an 
  account 
  of 
  such 
  

   details 
  as 
  I 
  have 
  to 
  present. 
  The 
  principal 
  new 
  information 
  is 
  in 
  

  

  