﻿94 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  quartzose 
  bed 
  terminating 
  the 
  lower 
  shales. 
  While 
  nearly 
  white 
  

   when 
  fresh, 
  this 
  rock 
  generally 
  weathers 
  to 
  a 
  grayish 
  yellow 
  color 
  

   and 
  often 
  exhibits 
  yellow 
  iron 
  stains. 
  On 
  the 
  weathered 
  edges 
  

   cross-bedding 
  structure 
  is 
  well 
  brought 
  out. 
  When 
  separated 
  from 
  

   the 
  rocks 
  below 
  by 
  a 
  shaly 
  bed, 
  this 
  rock 
  generally 
  projects 
  from 
  the 
  

   bank 
  for 
  a 
  suiHcient 
  distance 
  to 
  form 
  a 
  shelter 
  for 
  the 
  watchman 
  in 
  

   case 
  of 
  a 
  sudden 
  shower. 
  Where 
  this 
  sandstone 
  comes 
  down 
  to 
  the 
  

   level 
  of 
  the 
  roadbed, 
  at 
  a 
  projecting 
  cusp 
  of 
  the 
  clifY, 
  it 
  has 
  been 
  cut 
  

   through 
  and 
  a 
  portion 
  of 
  it 
  left 
  between 
  the 
  track 
  and 
  the 
  gorge. 
  

   In 
  the 
  shadow 
  of 
  this 
  rock 
  mass 
  stands 
  the 
  second 
  of 
  the 
  watch- 
  

   men's 
  shanties 
  which 
  we 
  meet 
  with 
  in 
  approaching 
  from 
  the 
  mouth 
  

   of 
  the 
  gorge.^ 
  The 
  upper 
  quartzose 
  bed 
  has 
  here 
  a 
  thickness 
  of 
  

   7J 
  feet. 
  Several 
  hundred 
  feet 
  south 
  of 
  this 
  point, 
  where 
  the 
  top 
  of 
  

   this 
  sandstone 
  is 
  level 
  with 
  the 
  roadbed, 
  a 
  huge 
  ripple, 
  15 
  feet 
  from 
  

   crest 
  to 
  crest, 
  and 
  nearly 
  2 
  feet 
  deep, 
  is 
  shown 
  on 
  the 
  river 
  side 
  of 
  

   the 
  track. 
  This 
  " 
  giant 
  ripple 
  " 
  was 
  described 
  and 
  illustrated 
  by 
  

   Gilbert,^ 
  who 
  found 
  other 
  ripples 
  of 
  similar 
  size 
  in 
  the 
  Medina 
  sand- 
  

   stone 
  at 
  Lockport, 
  as 
  well 
  as 
  in 
  the 
  quartzose 
  sandstone 
  near 
  Lewis- 
  

   ton. 
  

  

  On 
  the 
  surfaces 
  of 
  the 
  flagging 
  stones 
  which 
  are 
  derived 
  from 
  

   the 
  Medina 
  sandstones, 
  ripple 
  marks 
  of 
  small 
  size 
  are 
  not 
  uncom- 
  

   mon, 
  and 
  the 
  sidewalks 
  of 
  Buffalo 
  and 
  other 
  cities 
  where 
  this 
  rock 
  

   is 
  Utilized, 
  often 
  exhibit 
  fine 
  examples 
  of 
  such 
  rippled 
  rock 
  sur- 
  

   faces. 
  

  

  In 
  the 
  clifif 
  of 
  Milk 
  cave 
  falls 
  (or 
  St 
  Patrick's 
  falls), 
  which 
  is 
  the 
  

   second 
  lateral 
  fall 
  below 
  the 
  mouth 
  of 
  the 
  gorge, 
  the 
  upper 
  beds 
  

   of 
  the 
  Medina 
  formation 
  are 
  well 
  shown. 
  The 
  concretionary 
  layer 
  

   is 
  near 
  the 
  level 
  of 
  the 
  roadbed, 
  and 
  has 
  a 
  thickness 
  of 
  3 
  feet. 
  29 
  

   feet 
  above 
  it 
  is 
  the 
  base 
  of 
  the 
  upper 
  gray 
  quartzose 
  sandstone,, 
  

   before 
  reaching 
  which 
  we 
  find 
  that 
  the 
  red 
  sandstone 
  gradually 
  

   loses 
  its 
  bright 
  color, 
  at 
  first 
  being 
  mottled, 
  and 
  then 
  at 
  times 
  losing 
  

   its 
  red 
  color 
  altogether, 
  though 
  the 
  thin 
  partings 
  of 
  shale 
  still 
  retain 
  

  

  ^This 
  is 
  occupied 
  by 
  John 
  Garlow, 
  on 
  whose 
  beat 
  most 
  of 
  the 
  " 
  Niagara 
  

   crinoids 
  " 
  (Caryocrinus 
  ornatus) 
  are 
  to 
  be 
  found. 
  Specimens 
  

   may 
  generally 
  be 
  obtained 
  from 
  him 
  at 
  a 
  small 
  price. 
  

  

  'Bui. 
  geol. 
  soc. 
  Am. 
  10:135-40, 
  pi. 
  13, 
  ^S. 
  2. 
  

  

  