﻿{576 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  small 
  area 
  just 
  south 
  of 
  Chazy 
  village 
  mapped 
  by 
  Brainerd 
  and 
  

   Seely, 
  nearly 
  the 
  entire 
  series 
  is 
  shown, 
  the 
  higher 
  beds 
  out- 
  

   cropping 
  a 
  mile 
  east 
  of 
  the 
  lowest, 
  and 
  capped 
  by 
  the 
  Bl 
  *ck 
  River 
  

   and 
  Trenton 
  which 
  continue 
  on 
  thence 
  to 
  the 
  lake.* 
  But 
  less 
  

   than 
  three 
  miles 
  south 
  of 
  Chazy 
  village 
  the 
  easternmost 
  Chazy 
  

   outcrops 
  are 
  four 
  miles 
  distant 
  from 
  the 
  most 
  western, 
  and 
  the 
  

   eastern 
  outcrops 
  are 
  not 
  of 
  the 
  upper 
  Chazy 
  but 
  of 
  the 
  Maclurea 
  

   beds. 
  The 
  dip 
  is 
  somewhat 
  less 
  than 
  at 
  the 
  village, 
  but 
  by 
  no 
  

   means 
  sufficiently 
  so 
  to 
  account 
  for 
  the 
  greatly 
  increased 
  width 
  

   of 
  outcrop 
  ; 
  narrow 
  definite 
  horizons 
  are 
  found 
  repeated 
  in 
  going 
  

   from 
  east 
  to 
  west. 
  A 
  barren 
  interval 
  in 
  which 
  no 
  outcrops 
  occur 
  

   appears 
  in 
  the 
  center 
  of 
  the 
  area, 
  and 
  rapidly 
  widens 
  toward 
  the 
  

   southwest, 
  while 
  in 
  the 
  southern 
  part 
  of 
  the 
  township 
  outcrops 
  of 
  

   the 
  unfossiliferous 
  dolomite 
  of 
  doubtful 
  age 
  begin 
  to 
  appear. 
  On 
  

   the 
  Chazy-Beekmantown 
  line, 
  and 
  for 
  two 
  miles 
  north 
  of 
  it, 
  no 
  

   exposures 
  occur 
  in 
  the 
  entire 
  width 
  of 
  Chazy 
  township, 
  except 
  

   these 
  few 
  outcrops 
  in 
  the 
  center, 
  and 
  others 
  near 
  West 
  Chazy, 
  

   which 
  are 
  believed 
  to 
  be 
  Calciferous 
  sandstone, 
  but 
  for 
  the 
  present 
  

   are 
  classed 
  provisionally- 
  with 
  these" 
  beds. 
  As 
  has 
  already 
  been 
  

   stated, 
  no 
  Chazy 
  fossils 
  have 
  been 
  found 
  in 
  Beekmantown, 
  the 
  only 
  

   exposures 
  being 
  of 
  these 
  unfossiliferous 
  beds, 
  whose 
  outcrops 
  run 
  

   close 
  to 
  the 
  Trenton 
  exposures 
  along 
  the 
  lake, 
  indicating 
  that 
  

   much 
  or 
  all 
  of 
  the 
  Chazy 
  is 
  lacking 
  here. 
  Just 
  across 
  the 
  line 
  

   in 
  Plattsburgh 
  township, 
  however, 
  the 
  Chazy 
  reappears 
  and 
  is 
  

   largely 
  quarried 
  along 
  the 
  road 
  from 
  East 
  Beekmantown 
  to 
  

   Plattsburgh, 
  but 
  only 
  a 
  small 
  portion 
  of 
  the 
  entire 
  thickness 
  is 
  

   shown. 
  Further 
  south, 
  at 
  Bluff 
  Point, 
  is 
  an 
  excellent 
  section, 
  

   about 
  350 
  feet 
  thick, 
  comprising 
  a 
  large 
  part 
  of 
  the 
  lower 
  

   and 
  middle 
  divisions. 
  At 
  the 
  large 
  pulp 
  mill, 
  at 
  the 
  rapids 
  

   in 
  the 
  Saranac 
  river, 
  three 
  miles 
  southwest 
  of 
  Plattsburgh, 
  fifty 
  

   feet 
  of 
  alternating 
  limestone 
  and 
  slaty 
  layers, 
  with 
  sandy 
  bands 
  

   at 
  the 
  bottom, 
  are 
  well 
  shown, 
  and 
  are 
  believed 
  to 
  represent 
  the 
  

   basal 
  beds 
  of 
  the 
  Chazy 
  on 
  Yalcour 
  Island, 
  as 
  described 
  by 
  Messrs. 
  

   Brainerd 
  and 
  Seely.* 
  Thence 
  westward 
  the 
  township 
  furnishes 
  

   no 
  outcrops 
  till 
  the 
  Potsdam 
  ledges 
  are 
  reached. 
  

  

  In 
  northeastern 
  Peru 
  a 
  portion 
  of 
  the 
  Chazy 
  limestone 
  outcrops 
  

   near 
  the 
  lake 
  shore, 
  disclosing 
  the 
  upper 
  beds 
  of 
  the 
  lower 
  division, 
  

   and 
  the 
  basal 
  Maclurea 
  beds. 
  Exposures 
  further 
  south 
  are 
  shut 
  

  

  * 
  Am. 
  Gleol., 
  Vol. 
  II, 
  p. 
  326. 
  t 
  Bull. 
  Geol. 
  Soc. 
  Am., 
  Vol. 
  II, 
  pp. 
  291-6. 
  

  

  