﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  

  

  115 
  

  

  length 
  of 
  1305 
  feet, 
  is 
  now 
  preserved 
  in 
  the 
  museum 
  of 
  the 
  Buffalo 
  

   society 
  of 
  natural 
  sciences, 
  and 
  from 
  it 
  the 
  following 
  succession 
  of 
  

   strata 
  can 
  be 
  demonstrated.^ 
  

  

  Rondout 
  

   waterHme 
  

  

  f 
  WaterHme 
  above 
  the 
  mouth 
  of 
  the 
  well, 
  about 
  

  

  Salina 
  

  

  Feet 
  

  

  7 
  

  

  25 
  

  

  5 
  

  

  13 
  

  

  4 
  

  

  2 
  

  

  12 
  

  

  I 
  

  

  4 
  

  

  7 
  

  

  ! 
  Shale 
  and 
  cement 
  rock 
  in 
  thin 
  streaks 
  

  

  Tolerably 
  pure 
  cement 
  rock 
  

   [ 
  Shale 
  and 
  cement 
  rock 
  in 
  thin 
  streaks 
  

   Pure 
  w^hite 
  gypsum 
  

   Shale 
  

  

  White 
  gypsum 
  

   Shale 
  

  

  White 
  gypsum 
  

   Shale 
  and 
  gypsum 
  mottled 
  

   Drab 
  colored 
  shale 
  with 
  several 
  thin 
  layers 
  of 
  

  

  white 
  gypsum 
  

   Dark 
  colored 
  limestone 
  

   Shale 
  and 
  limestone 
  

   Compact 
  shale 
  

  

  Gypsum 
  and 
  shale 
  mottled 
  and 
  in 
  streaks 
  ap- 
  

   proximating 
  290± 
  

   The 
  gypsum 
  of 
  this 
  formation 
  has 
  never 
  been 
  mined 
  in 
  this 
  dis- 
  

   trict, 
  owing 
  to 
  the 
  strong 
  flow 
  of 
  water 
  through 
  these 
  strata. 
  No 
  

   salt 
  beds 
  are 
  found 
  in 
  the 
  SaHna 
  of 
  this 
  region, 
  though 
  they 
  are 
  

   characteristic 
  of 
  the 
  formation 
  farther 
  east. 
  Salt 
  water 
  is 
  however 
  

   obtained. 
  Fossils 
  are 
  very 
  rare 
  throughout 
  these 
  beds; 
  none 
  have 
  

   been 
  found 
  in 
  the 
  exposures 
  on 
  the 
  Niagara 
  river. 
  

  

  58 
  

  

  2 
  

  

  4 
  

   3 
  

  

  Rondout 
  waterlime 
  

  

  The 
  Salina 
  beds 
  of 
  this 
  region 
  grade 
  upward 
  into 
  a 
  magnesian 
  

   limestone 
  which 
  contains 
  a 
  considerable 
  amount 
  of 
  aluminium^ 
  sili- 
  

   cate. 
  The 
  upper 
  portion 
  of 
  this 
  series, 
  which 
  in 
  the 
  Niagara 
  region 
  

   has 
  a 
  thickness 
  of 
  about 
  50 
  feet, 
  is 
  very 
  uniform 
  in 
  character 
  and 
  

   suitable 
  for 
  the 
  manufacture 
  of 
  hydrauHc 
  cement. 
  In 
  North 
  Buf- 
  

   falo, 
  extensive 
  quarries 
  have 
  been 
  opened 
  in 
  this 
  rock 
  by 
  the 
  Bufifalo 
  

  

  ^Pohlman. 
  Cement 
  and 
  gypsum 
  deposits 
  in 
  Buffalo. 
  Am. 
  inst. 
  min. 
  eng. 
  

   Trans. 
  Oct. 
  1888. 
  

  

  