﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  99 
  

  

  shanties 
  on 
  the 
  railroad, 
  where 
  the 
  top 
  of 
  the 
  CHnton 
  Hmestone 
  is 
  

   on 
  a 
  level 
  with 
  the 
  roadbed, 
  this 
  rock 
  w^as 
  formerly 
  quarried 
  on 
  the 
  

   river 
  side, 
  and 
  here 
  a 
  good 
  opportunity 
  is 
  afforded 
  to 
  collect 
  fossils 
  

   from 
  the 
  limestone 
  fragments. 
  Blocks 
  of 
  the 
  various 
  limestones 
  

   are 
  also 
  seen 
  by 
  the 
  side 
  of 
  the 
  track 
  between 
  the 
  second 
  and 
  third 
  

   shanties. 
  

  

  At 
  the 
  whirlpool 
  on 
  the 
  Canadian 
  side 
  the 
  Clinton 
  limestones 
  

   are 
  seen 
  in 
  both 
  banks 
  of 
  the 
  old 
  St 
  Davids 
  gorge, 
  the 
  section 
  on 
  

   the 
  west 
  showing 
  glacial 
  striae. 
  Near 
  the 
  foot 
  of 
  the 
  eastern 
  wall 
  

   of 
  this 
  old 
  gorge 
  and 
  on 
  the 
  talus 
  heaps 
  which 
  flank 
  it, 
  are 
  large 
  

   masses 
  of 
  calcareous 
  tufa 
  often 
  inclosing 
  leaves, 
  moss 
  or 
  other 
  vege- 
  

   table 
  structures. 
  These 
  masses 
  appear 
  to 
  come 
  from 
  the 
  horizon 
  

   of 
  the 
  Clinton 
  Hmestone, 
  though 
  they 
  have 
  not 
  been 
  seen 
  in 
  place, 
  

   and 
  it 
  is 
  not 
  improbable 
  that 
  a 
  " 
  petrifying 
  spring 
  " 
  carrying 
  a 
  

   strong 
  solution 
  of 
  carbonate 
  of 
  lime 
  issues 
  from 
  this 
  rock. 
  Springs 
  

   issue 
  abundantly 
  from 
  between 
  the 
  two 
  members 
  of 
  the 
  Clinton 
  

   limestone, 
  and 
  they 
  carry 
  lime 
  in 
  solution, 
  as 
  is 
  indicated 
  by 
  the 
  

   deposit 
  of 
  soft 
  calcareous 
  ooze 
  on 
  the 
  rocks 
  and 
  other 
  substances 
  

   over 
  which 
  this 
  water 
  flows. 
  On 
  exposure 
  to 
  the 
  atmosphere 
  this 
  

   ooze 
  will 
  dry 
  and 
  harden. 
  The 
  "joint 
  faces 
  of 
  the 
  Clinton 
  limestone 
  

   are 
  everywhere 
  veneered 
  over 
  with 
  a 
  thin 
  deposit 
  of 
  calcium 
  car- 
  

   bonate. 
  

  

  Limestone 
  lenses 
  of 
  the 
  Clinton. 
  At 
  intervals 
  in 
  the 
  upper 
  Clinton 
  

   limestone 
  may 
  be 
  seen 
  large 
  lenticular 
  masses 
  of 
  a 
  compact, 
  hard 
  

   and 
  apparently 
  structureless 
  limestone, 
  often 
  concretionary 
  and 
  not 
  

   infrequently 
  showing 
  numerous 
  smooth 
  and 
  striated 
  surfaces 
  of 
  the 
  

   type 
  known 
  as 
  " 
  slickensides 
  " 
  and 
  which 
  are 
  indicative 
  of 
  shearing 
  

   movements. 
  One 
  of 
  these 
  masses 
  is 
  visible 
  in 
  the 
  bank 
  opposite 
  

   the 
  third 
  watchman's 
  hut. 
  Its 
  greatest 
  thickness 
  is 
  about 
  8 
  feet, 
  

   and 
  it 
  lies 
  between 
  the 
  upper 
  limestone 
  and 
  the 
  overlying 
  shale, 
  

   being 
  partly 
  embedded 
  in 
  both. 
  The 
  rock 
  is 
  often 
  cavernous 
  or 
  

   geodiferous, 
  the 
  cavities 
  when 
  freshly 
  broken 
  being 
  filled 
  by 
  snowy 
  

   gypsum 
  or 
  grayish 
  anhydrite. 
  Fossils 
  are 
  abundant 
  in 
  this 
  rock. 
  

  

  Several 
  other 
  lenses 
  of 
  this 
  type 
  are 
  visible 
  in 
  the 
  upper 
  Clinton 
  

   limestone 
  where 
  it 
  is 
  crossed 
  by 
  the 
  Rome, 
  Watertown 
  and 
  Ogdens- 
  

   burg 
  railroad 
  below 
  Lewiston 
  hights. 
  These 
  masses 
  are 
  however 
  

  

  