﻿Report 
  of 
  the 
  State 
  Geologist. 
  673 
  

  

  rarely 
  shaly 
  or 
  slaty 
  layers 
  are 
  met 
  with 
  ; 
  red 
  and 
  white 
  are 
  the 
  

   prevailing 
  colors, 
  the 
  red 
  largely 
  predominating 
  with 
  approach 
  

   to 
  areas 
  of 
  older 
  rocks 
  ; 
  but 
  gray 
  bands 
  also 
  occur, 
  some 
  with 
  a 
  

   greenish 
  tint, 
  yellow 
  layers 
  iron-stained 
  in 
  whole 
  or 
  in 
  part 
  are 
  

   common, 
  and 
  finally 
  glauconitic 
  looking 
  bands 
  are 
  also 
  found. 
  

   In 
  Mooers, 
  Chanrplain, 
  Altona 
  and 
  Chazy 
  the 
  prevailing 
  dip 
  is 
  

   about 
  north 
  twenty 
  degrees 
  east 
  and 
  quite 
  gentle, 
  seldom 
  

   exceeding 
  five 
  degrees 
  and 
  commonly 
  less. 
  Further 
  south 
  the 
  

   prevai 
  ing 
  direction 
  is 
  to 
  the 
  east, 
  or 
  south 
  of 
  east, 
  but 
  the 
  dip 
  is 
  

   also 
  gentle. 
  Local 
  discrepancies 
  occur, 
  as 
  near 
  Chazy 
  village, 
  

   where 
  there 
  is 
  great 
  variation 
  in 
  direction 
  in 
  a 
  limited 
  area, 
  and 
  

   at 
  Lapham's 
  Mills 
  in 
  Peru, 
  wliere 
  the 
  dip 
  is 
  south 
  fifty 
  degrees 
  

   west. 
  These 
  variations 
  are 
  in 
  some 
  cases 
  certainly, 
  and 
  in 
  others 
  

   probably, 
  due 
  to 
  local 
  tilting 
  accompanying 
  faulting. 
  

  

  The 
  Calciferous 
  sandrock. 
  — 
  Rocks 
  of 
  Calciferous 
  age 
  occur 
  

   exposed 
  in 
  considerable 
  force 
  in 
  Champlain, 
  Beekmantown 
  and 
  

   Peru 
  townships, 
  but 
  in 
  general 
  the 
  exposures 
  are 
  poor 
  and 
  scattered, 
  

   and 
  the 
  order 
  of 
  succession 
  and 
  thickness 
  of 
  the 
  various 
  members 
  

   has 
  not 
  been 
  made 
  out. 
  The 
  exposures 
  in 
  Champlain 
  and 
  Beek- 
  

   mantown 
  give 
  at 
  least 
  400 
  feet 
  in 
  thickness, 
  as 
  a 
  rough 
  measure- 
  

   ment, 
  but 
  this 
  is 
  surely 
  only 
  a 
  fraction 
  of 
  the 
  real 
  thickness. 
  

   The 
  prevailing 
  rocks 
  are 
  massive, 
  gray 
  or 
  blue-gray, 
  sandy 
  dolo- 
  

   mites, 
  and 
  dolomitic 
  sandstones, 
  very 
  irregularly 
  bedded, 
  so 
  that 
  

   •with 
  poor 
  exposures 
  it 
  is 
  often 
  a 
  difficult 
  matter 
  to 
  get 
  a 
  good 
  

   determination 
  of 
  the 
  dip. 
  On 
  exposed 
  surfaces 
  the 
  calcareous 
  

   material 
  has 
  been 
  largely 
  leached 
  out, 
  and 
  in 
  certain 
  of 
  the 
  beds 
  

   thick 
  yellowish 
  brown 
  weathered 
  sandy 
  crusts 
  are 
  characteristic. 
  

   In 
  Champlain 
  township, 
  where 
  its 
  contact 
  with 
  the 
  Potsdam 
  is 
  

   well 
  exhibited, 
  the 
  typical 
  Potsdam 
  and 
  typical 
  Calciferous 
  are 
  

   separated 
  from 
  each 
  other 
  by 
  a 
  series 
  of 
  passage 
  beds. 
  These 
  

   are 
  dark-colored 
  sandstones, 
  sometimes 
  pebbly, 
  often 
  quite 
  coarse, 
  

   which 
  contain 
  a 
  small 
  per 
  cent 
  of 
  dolomitic 
  matter. 
  "No 
  such 
  

   rocks 
  have 
  been 
  found 
  in 
  the 
  main 
  body 
  of 
  the 
  Potsdam, 
  so 
  their 
  

   stratigraphic 
  position 
  seems 
  clear, 
  whether 
  they 
  be 
  classed 
  as 
  

   Potsdam 
  or 
  Calciferous. 
  Mr. 
  Walcott 
  has 
  described 
  similar 
  pas- 
  

   sage 
  beds 
  at 
  Chateaugay 
  Chasm 
  in 
  Franklin 
  county.* 
  In 
  this 
  

   township 
  an 
  unknown 
  thickness 
  of 
  the 
  upper 
  Calciferous 
  and 
  the 
  

   basal 
  portion 
  of 
  the 
  succeeding 
  Chazy 
  limestone 
  do 
  not 
  appear 
  

  

  *Bull. 
  80, 
  U. 
  S. 
  Geol. 
  Sur., 
  p. 
  342-3. 
  

  

  85 
  

  

  