﻿678 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  occasional 
  appearance 
  of 
  slickensides. 
  All 
  the 
  rock 
  is 
  much 
  

   shattered, 
  and 
  the 
  cracks 
  are, 
  for 
  the 
  most 
  part, 
  filled 
  by 
  seams 
  

   of 
  calcite, 
  varying 
  from 
  the 
  breadth 
  of 
  a 
  hair 
  up 
  to 
  two 
  or 
  three 
  

   inches. 
  This 
  peculiar 
  shearing 
  is 
  more 
  prominent 
  also 
  in 
  certain 
  

   layers 
  than 
  in 
  others, 
  and 
  some 
  are 
  nearly 
  free 
  from 
  it. 
  These 
  

   slaty 
  limestones 
  are 
  also 
  unfossiliferous, 
  and, 
  it 
  is 
  thought, 
  furnish 
  

   a 
  possible 
  explanation 
  of 
  the 
  dip 
  at 
  Point 
  au 
  Fer, 
  for 
  the 
  demon- 
  

   stration 
  of 
  which 
  the 
  Point 
  must 
  be 
  revisited. 
  In 
  Chazy 
  town- 
  

   ship 
  the 
  Trenton 
  belt 
  possesses 
  considerable 
  width, 
  presenting 
  

   numerous, 
  though 
  very 
  poor 
  outcrops, 
  which 
  in 
  general 
  are 
  

   abundantly 
  fossiliferous. 
  In 
  the 
  river-bed 
  near 
  Chazy 
  village 
  

   the 
  lower 
  beds 
  occur, 
  conformably 
  overlying 
  the 
  Black 
  River 
  

   and 
  Chazy 
  limestones, 
  with 
  a 
  dip 
  of 
  twenty-five 
  degrees 
  to 
  north, 
  

   sixty 
  degrees 
  east. 
  One 
  mile 
  to 
  the 
  northeast 
  the 
  Trenton 
  is 
  

   again 
  exposed 
  in 
  the 
  river-bed 
  at 
  a 
  mill, 
  and 
  here 
  dips 
  ten 
  

   degrees 
  south, 
  fifty 
  degrees 
  east, 
  the 
  Maclurea 
  beds 
  of 
  the 
  

   Chazy, 
  which 
  outcrop 
  one-quarter 
  of 
  a 
  mile 
  to 
  the 
  northwest, 
  

   having 
  the 
  same 
  dip. 
  Between 
  these 
  points 
  and 
  the 
  lake, 
  how- 
  

   ever, 
  all 
  the 
  dips 
  are 
  to 
  the 
  northwest, 
  though 
  exposures 
  are 
  too 
  

   poor 
  in 
  the 
  main 
  to 
  furnish 
  reliable 
  dips. 
  This 
  Trenton 
  belt 
  east 
  

   of 
  Chazy 
  village 
  is 
  three 
  miles 
  wide, 
  then 
  cut 
  off 
  by 
  the 
  lake, 
  but 
  

   passing 
  south 
  it 
  rapidly 
  narrows, 
  and 
  the 
  Chazy 
  limestone 
  

   reaches 
  the 
  shore 
  at 
  Montey's 
  bay. 
  

  

  In 
  Beekmantown, 
  rocks 
  referred 
  to 
  the 
  Trenton 
  are 
  found 
  in 
  

   the 
  southern 
  part 
  of 
  the 
  township 
  in 
  a 
  belt 
  one 
  and 
  one-half 
  

   miles 
  wide, 
  back 
  from 
  the 
  lake 
  shore, 
  the 
  black, 
  slaty 
  limestones 
  

   outcropping 
  in 
  a 
  series 
  of 
  short, 
  sharp 
  parallel 
  ridges, 
  with 
  a 
  

   rather 
  steep 
  dip 
  to 
  the 
  south 
  of 
  east, 
  and 
  continuing 
  on 
  into 
  

   Plattsburgh 
  township, 
  sparingly 
  fossiliferous, 
  but 
  sufficiently 
  so 
  

   to 
  demonstrate 
  their 
  age. 
  North 
  of 
  these 
  Trenton 
  beds 
  are 
  

   frequent 
  exposures 
  along 
  the 
  lake 
  shore, 
  of 
  rocks 
  somewhat 
  

   resembling 
  them, 
  which 
  furnished 
  practically 
  no 
  fossils, 
  and 
  

   which, 
  for 
  the 
  present, 
  must 
  be 
  classed 
  as 
  of 
  uncertain 
  age. 
  They 
  

   consist 
  of 
  thin 
  beds 
  of 
  dark 
  blue 
  or 
  nearly 
  black 
  limestone, 
  with 
  

   some 
  slaty 
  beds, 
  occasional 
  blue-gray 
  beds, 
  and 
  some 
  quite 
  

   sandy, 
  light-colored 
  heds. 
  They 
  are, 
  as 
  a 
  whole, 
  more 
  mas>ive 
  

   than 
  the 
  Trenton 
  beds 
  south 
  of 
  them 
  and 
  differ 
  in 
  dip, 
  this 
  being 
  

   north 
  of 
  east 
  instead 
  of 
  south 
  of 
  east, 
  and 
  veering 
  gradually 
  to 
  

   the 
  north 
  as 
  they 
  are 
  followed 
  north 
  along 
  the 
  lake. 
  At 
  the 
  

  

  