﻿REPORT 
  

  

  ON 
  A 
  

  

  Preliminary 
  Examination 
  of 
  the 
  General 
  and 
  Economic 
  

  

  Geology 
  of 
  Four 
  Townships 
  in 
  St. 
  Lawrence 
  

  

  and 
  Jefferson 
  Counties, 
  New 
  York. 
  

  

  By 
  C. 
  H. 
  SMYTH, 
  Jr. 
  

  

  Prof. 
  James 
  Hall, 
  State 
  Geologist: 
  

  

  Sir. 
  — 
  The 
  genetic 
  and 
  structural 
  problems 
  presented 
  by 
  the 
  

   crystalline 
  rocks 
  of 
  northern 
  'New 
  York 
  are 
  of 
  such 
  a 
  nature 
  that 
  

   their 
  solution 
  demands 
  extended 
  and 
  careful 
  investigation. 
  The 
  

   present 
  paper 
  is 
  submitted 
  not 
  as 
  a 
  final 
  contribution 
  to 
  the 
  

   geology 
  of 
  ihe 
  region, 
  embodying 
  the 
  result 
  of 
  thorough 
  study, 
  

   but, 
  rather, 
  as 
  a 
  report 
  of 
  progress, 
  giving 
  some 
  idea 
  of 
  the 
  char- 
  

   acter 
  of 
  the 
  problems 
  to 
  be 
  solved 
  and 
  the 
  efforts 
  made 
  toward 
  

   that 
  end. 
  

  

  The 
  area 
  examined 
  contains 
  about 
  225 
  square 
  miles 
  and 
  includes 
  

   the 
  towns 
  of 
  G-ouverneur, 
  Fowler 
  and 
  the 
  southern 
  part 
  of 
  Kossie 
  

   in 
  St. 
  Lawrence 
  county, 
  and 
  Antwerp 
  in 
  Jefferson 
  county. 
  This 
  

   area 
  is 
  occupied 
  in 
  the 
  main 
  by 
  rocks 
  belonging 
  to 
  four 
  lithologic 
  

   groups, 
  viz., 
  gneiss, 
  granite, 
  crystalline 
  limestone 
  and 
  sandstone 
  

   or 
  quartzite. 
  These 
  lithologic 
  groups 
  are 
  used 
  as 
  a 
  basis 
  for 
  the 
  

   accompanying 
  map, 
  no 
  other 
  mode 
  of 
  classification 
  being 
  as 
  yet 
  

   available. 
  But 
  these 
  distinctions 
  are 
  not 
  without 
  their 
  time 
  

   value, 
  as 
  the 
  sandstone 
  is 
  clearly 
  the 
  most 
  recent 
  rock, 
  the 
  granite 
  

   next, 
  while 
  a 
  portion 
  of 
  the 
  gneiss 
  is 
  probably 
  the 
  oldest, 
  under- 
  

   lying 
  all 
  the 
  others. 
  These 
  rocks, 
  as 
  they 
  occur 
  in 
  a 
  small 
  por- 
  

   tion 
  of 
  the 
  area 
  examined, 
  have 
  been 
  described 
  by 
  the 
  Avri;er* 
  

  

  * 
  0. 
  H. 
  Smyth, 
  J>.; 
  A 
  -Geological 
  Reconnoi 
  usance 
  in 
  the 
  vicinity 
  of 
  Gouvepneur, 
  N. 
  Y„, 
  N. 
  Y 
  

   Acad. 
  Sci., 
  XII 
  [, 
  pp. 
  97-103, 
  also 
  Petrography 
  of 
  the 
  Gnisses 
  of 
  Gouverneur, 
  N. 
  Y., 
  ibid., 
  pp. 
  

   203-217. 
  

  

  