﻿682 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  the 
  village 
  other 
  Black 
  River 
  outcrops 
  lie 
  nearly 
  as 
  close 
  to 
  the 
  

   •Potsdam. 
  In 
  the 
  vicinity 
  of 
  the 
  village 
  the 
  greatest 
  and 
  most 
  

   rapid 
  variations 
  in 
  the 
  strike 
  and 
  dip 
  of 
  the 
  limestones 
  occur. 
  

   On 
  the 
  Champlaiti-Chazy 
  line 
  the 
  Rhynchonella 
  plena 
  beds 
  of 
  

   the 
  upper 
  Chazy 
  lie 
  close 
  to 
  the 
  Potsdam, 
  with 
  a 
  strike 
  which 
  

   would 
  bring 
  them 
  together 
  a 
  short 
  distance 
  away. 
  Passing 
  north 
  

   into 
  Champlain 
  township 
  no 
  outcrops 
  between 
  the 
  Potsdam 
  and 
  

   the 
  lake 
  appear 
  till 
  Coopersville 
  is 
  reached. 
  The 
  Potsdam 
  

   exposed 
  in 
  Corbeau 
  creek, 
  west 
  of 
  Coopersville, 
  with 
  a 
  dip 
  

   of 
  live 
  degrees 
  to 
  the 
  north, 
  lies 
  only 
  three-quarters 
  of 
  a 
  mile 
  

   west 
  of 
  an 
  outcrop 
  of 
  the 
  Maclurea 
  beds, 
  dipping 
  five 
  degrees 
  to 
  

   the 
  east, 
  much 
  too 
  narrow 
  an 
  interval 
  to 
  contain 
  the 
  lower 
  

   Chazy 
  beds 
  and 
  the 
  entire 
  Calciferous. 
  Korth 
  of 
  Coopersville 
  the 
  

   Potsdam 
  line 
  of 
  outcrop 
  swings 
  to 
  the 
  west 
  and 
  the 
  Calciferous 
  

   begins 
  to 
  appear. 
  At 
  first 
  onfv 
  the 
  passage 
  beds 
  are 
  seen, 
  but 
  

   further 
  north 
  a 
  considerable 
  thickness 
  of 
  the 
  lower 
  Calciferous 
  

   beds 
  occur, 
  and 
  it 
  has 
  alread}^ 
  been 
  shown 
  that 
  along 
  this 
  fault 
  

   line 
  in 
  Champlain 
  township 
  the 
  lower 
  division 
  of 
  the 
  Chazy 
  and 
  

   an 
  unknown 
  amount 
  of 
  the 
  upper 
  Calciferous 
  are 
  lacking. 
  In 
  

   western 
  Chazy 
  the 
  lower 
  division 
  of 
  the 
  Chazy 
  limestone 
  lies 
  

   close 
  to 
  the 
  Potsdam. 
  South 
  of 
  these 
  Chazy 
  outcrops 
  the 
  

   un 
  classed 
  dolomites, 
  probably 
  Calciferous, 
  appear 
  at 
  West 
  Chaz}^, 
  

   and 
  beyond 
  this 
  point 
  southward 
  any 
  further 
  tracing 
  of 
  this 
  

   dislocation 
  is 
  made 
  impossible 
  by 
  the 
  total 
  lack 
  of 
  exposures. 
  

   There 
  is 
  clearly 
  a 
  fault 
  along 
  this 
  line, 
  whose 
  position 
  on 
  the 
  

   map 
  is 
  indicated 
  by 
  the 
  western 
  edge 
  of 
  the 
  Chazy 
  outcrop 
  

   throughout 
  Chazy 
  and 
  Champlain 
  townships. 
  The 
  greatest 
  

   disturbance 
  and 
  maximum 
  throw 
  are 
  at 
  Chazy 
  village, 
  decreasing 
  

   thence 
  north 
  and 
  south.* 
  

  

  In 
  Chazy 
  township 
  are 
  further 
  evidences 
  of 
  dislocation. 
  A 
  

   little 
  over 
  a 
  mile 
  south 
  of 
  Chazy 
  village 
  the 
  line 
  of 
  Chazy- 
  

   Trenton 
  contact 
  swings 
  to 
  the 
  east, 
  the 
  Chazy-Potsdam 
  contact 
  

   continuing 
  to 
  bear 
  to 
  the 
  southwest. 
  Three 
  miles 
  south 
  of 
  

   Chazy 
  village, 
  as 
  a 
  result 
  of 
  this 
  divergence, 
  Chazy 
  rocks 
  outcrop 
  

   throughout 
  a 
  belt 
  four 
  miles 
  in 
  breadth, 
  whereas 
  at 
  Chazy 
  

   village, 
  with 
  only 
  slightly 
  increased 
  dip, 
  the 
  entire 
  formation 
  

   outcrops 
  within 
  a 
  breadth 
  of 
  one 
  mile. 
  Moreover, 
  passing 
  across 
  

  

  * 
  Conf 
  . 
  Bminerd 
  and 
  Seely, 
  Am. 
  Geol, 
  vol. 
  II, 
  p. 
  327; 
  Bull. 
  Am. 
  Mus. 
  Nat. 
  Hut., 
  vol. 
  Ill, 
  

   d. 
  12; 
  CD. 
  Walcott, 
  Bull. 
  U. 
  8. 
  Geol. 
  Surv. 
  No. 
  80, 
  p. 
  22, 
  

  

  