﻿Report 
  of 
  the 
  State 
  Geologist. 
  641 
  

  

  form 
  a 
  great 
  laccolite 
  at 
  Cannons 
  Point, 
  south 
  of 
  Essex, 
  and 
  

   appear 
  at 
  various 
  points 
  as 
  dikes 
  as 
  far 
  north 
  as 
  Willsboro' 
  Point. 
  

   The 
  diabase 
  and 
  related 
  caniptonites 
  are 
  found 
  all 
  along 
  

   the 
  shores, 
  in 
  almost 
  every 
  iron 
  mine 
  in 
  the 
  country, 
  in 
  the 
  

   Norian 
  mountains 
  (one 
  was 
  discovered 
  well 
  up 
  toward 
  the 
  top 
  

   of 
  Mt. 
  Mclntyre), 
  and 
  at 
  various 
  limestone 
  or 
  other 
  quarries. 
  

   They 
  furnish 
  an 
  easy 
  mark 
  for 
  erosion, 
  and 
  have 
  served 
  to 
  direct 
  

   not 
  a 
  few 
  streams. 
  Such 
  is 
  the 
  case 
  opposite 
  Caseadeville, 
  in 
  

   Keene 
  ; 
  in 
  the 
  falls 
  of 
  the 
  Ausable 
  just 
  above 
  Keene 
  Center 
  ; 
  at 
  

   the 
  falls 
  of 
  the 
  west 
  branch 
  of 
  the 
  Ausable 
  in 
  Wilmington 
  notch, 
  

   and 
  in 
  a 
  small 
  cascade 
  on 
  Mt. 
  Mclntyre. 
  The 
  general 
  features 
  

   of 
  these 
  igneous 
  rocks, 
  have 
  already 
  been 
  described 
  at 
  length 
  by 
  

   J. 
  F. 
  Kemp 
  and 
  V. 
  F. 
  Marsters, 
  in 
  Bulletin 
  107 
  of 
  the 
  U. 
  S. 
  Geol. 
  

   Survey, 
  an 
  abstract 
  of 
  which 
  appeared 
  in 
  the 
  Transactions 
  of 
  the 
  

   Few 
  York 
  Acad, 
  of 
  Science, 
  XI, 
  13, 
  1891. 
  

  

  VI. 
  The 
  glacial 
  and 
  post-glacial 
  deposits. 
  — 
  These 
  are 
  very 
  

   widespread, 
  and 
  where 
  sandy, 
  they 
  give 
  the 
  country 
  the 
  aspect 
  

   of 
  the 
  sea-shore. 
  There 
  is 
  some 
  coarse, 
  unsorted, 
  morainic 
  material, 
  

   but 
  the 
  chief 
  accumulations 
  are 
  deltas, 
  lake-deposits, 
  and 
  clays. 
  The 
  

   first 
  two 
  are 
  best 
  shown 
  in 
  the 
  interior 
  valleys, 
  and 
  of 
  all 
  such 
  pheno- 
  

   mena 
  no 
  finer 
  examples 
  could 
  be 
  desired. 
  Near 
  Lake 
  Champlain, 
  

   the 
  well-known 
  clays 
  are 
  present 
  in 
  great 
  force, 
  and 
  most 
  of 
  the 
  

   shore 
  country, 
  covered 
  on 
  the 
  map 
  by 
  the 
  little 
  circles, 
  is 
  buried 
  in 
  

   these 
  clays. 
  At 
  times 
  they 
  hide 
  ideal 
  glaciated 
  surfaces 
  of 
  Cal- 
  

   ciferous 
  limestone, 
  so 
  that 
  scratched 
  specimens 
  can 
  be 
  obtained, 
  

   which 
  are 
  the 
  best 
  the 
  writer 
  has 
  ever 
  seen. 
  This 
  is 
  especially 
  

   true 
  of 
  the 
  shore 
  ledges 
  in 
  northeastern 
  Crown 
  Point. 
  We 
  paid 
  

   only 
  general 
  attention 
  to 
  them, 
  but 
  cuuld 
  not 
  well 
  help 
  being 
  

   struck 
  with 
  the 
  abundance 
  of 
  pebbles 
  of 
  Potsdam, 
  high 
  up 
  on 
  the 
  

   gneissic 
  ridges. 
  Such 
  were 
  found 
  on 
  Bulwagga 
  mountain, 
  on 
  

   the 
  road 
  from 
  the 
  lake 
  to 
  the 
  Coot 
  Hill 
  mine. 
  

  

  Stratigraphical 
  relations 
  of 
  the 
  above 
  series. 
  — 
  The 
  rocks 
  of 
  series 
  

   V, 
  as 
  stated, 
  are 
  of 
  quite 
  universal 
  distribution, 
  penetrating 
  all 
  the 
  

   others. 
  Those 
  of 
  IV 
  are 
  limited 
  to 
  the 
  Lake 
  Champlain 
  shure, 
  

   and 
  in 
  Essex 
  county 
  extend 
  at 
  most 
  but 
  three 
  or 
  four 
  miles 
  back, 
  

   as. 
  in 
  the 
  case 
  of 
  the 
  Potsdam 
  sandstone 
  in 
  Ticonderoga, 
  Crown 
  

   Point 
  and 
  Chesterfield. 
  The 
  remotest 
  one 
  is 
  in 
  the 
  first 
  named. 
  

   It 
  is 
  seven 
  and 
  a 
  half 
  miles 
  from 
  Lake 
  Champlain, 
  and 
  

   undoubtedly 
  the 
  remnant 
  of 
  a 
  strip 
  that 
  set 
  back 
  through 
  Crown 
  

   81 
  

  

  