﻿r26 
  NEW 
  YORK 
  STxVTE 
  MUSEUM 
  

  

  is 
  gneissoid, 
  containing 
  much 
  biotite, 
  garnets 
  and 
  often, 
  crushed 
  

   feldspars. 
  The 
  foliation 
  banding 
  of 
  the 
  ledges 
  bears 
  N 
  65" 
  E. 
  

   Outcrops 
  of 
  the 
  same 
  character 
  are 
  seen 
  from 
  this 
  point 
  northward 
  

   along 
  Mount 
  creek 
  (loc. 
  135). 
  The 
  other 
  streams 
  in 
  the 
  town 
  of 
  

   Ohio, 
  Herkimer 
  co., 
  are 
  in 
  a 
  sand 
  plain 
  and 
  show 
  no 
  outcrops 
  in 
  

   their 
  channels. 
  

  

  The 
  north 
  or 
  main 
  tributary 
  of 
  West 
  Canada 
  creek 
  has 
  no 
  out- 
  

   crop 
  exposed 
  in 
  its 
  valley 
  until 
  North 
  wood 
  is 
  reached 
  ; 
  and 
  flows 
  for 
  

   four 
  miles 
  between 
  sandy 
  banks 
  of 
  drift, 
  often 
  with 
  high 
  terraces. 
  

   There 
  is 
  an 
  outcrop 
  of 
  crystalline 
  rock 
  beneath 
  the 
  saw-mill 
  at 
  

   Northwood 
  and 
  on 
  the 
  neighboring 
  hillsides 
  (136). 
  It 
  is 
  less 
  

   gneissic 
  and 
  more 
  feldspathic 
  than 
  that 
  on 
  Mount 
  creek. 
  The 
  

   country 
  rock 
  between 
  Hinckley 
  and 
  Forestport 
  is 
  deeply 
  buried 
  

   beneath 
  saud 
  hills 
  and 
  plateaus. 
  At 
  Forestport 
  extensive 
  outcrops 
  

   of 
  coarse 
  hornbleudic 
  red 
  granite 
  occur 
  along 
  Big 
  Woodhullcreek, 
  

   Alder 
  creek 
  and 
  the 
  ''feeder" 
  of 
  the 
  Black 
  river 
  canal 
  (138). 
  The 
  

   stone 
  is 
  almost 
  identical 
  with 
  the 
  red 
  granites 
  of 
  Maine 
  and 
  eastern 
  

   Massachusetts. 
  From 
  Forestport 
  to 
  Hawkinsville 
  the 
  " 
  feeder 
  " 
  

   has 
  been 
  excavated 
  chiefly 
  in 
  loose 
  material. 
  Extensive 
  outcrops 
  

   of 
  a 
  handsome 
  fine-grained 
  light-gray 
  gabbro 
  (139 
  B) 
  occur 
  on 
  

   Crystal 
  creek 
  in 
  the 
  center 
  of 
  the 
  town 
  of 
  Hawkinsville 
  and 
  within 
  

   quarter 
  of 
  a 
  mile 
  of 
  ledges 
  of 
  Trenton 
  limestone. 
  (139 
  A). 
  No 
  

   crystalhnes 
  are 
  seen 
  in 
  Boonville 
  nor 
  Leyden. 
  Above 
  the 
  bridge 
  at 
  

   Port 
  Leyden, 
  Black 
  river 
  flows 
  through 
  a 
  rather 
  narrow 
  alluvial 
  

   plain 
  without 
  outcrops. 
  At 
  and 
  below 
  the 
  bridge, 
  (loc. 
  142 
  C) 
  are 
  

   large 
  gabbro 
  bosses 
  similar 
  to 
  those 
  at 
  Hawkinsville 
  but 
  reddish 
  in 
  

   color. 
  The 
  masses 
  of 
  rock 
  are 
  very 
  strongly 
  banded 
  in 
  a 
  vertical 
  

   direction, 
  with 
  black 
  streaks 
  rich 
  in 
  biotite 
  and 
  somewhat 
  gneissic. 
  

   There 
  are, 
  also, 
  numerous 
  narrow 
  quartz 
  veins. 
  From 
  Port 
  Ley- 
  

   den 
  to 
  Lyon 
  falls 
  the 
  channel 
  of 
  Black 
  river 
  is 
  entirely 
  in 
  the 
  

   gabbro 
  (143 
  D). 
  The 
  latter 
  is 
  strongly 
  banded 
  at 
  Lyon 
  falls, 
  specially 
  

   near 
  the 
  pulp 
  mill, 
  (143 
  A) 
  (Fig. 
  1.) 
  where 
  the 
  flowage 
  lines 
  have 
  a 
  

   direction 
  of 
  N 
  60° 
  E. 
  Where 
  unaltered 
  it 
  is 
  a 
  dark 
  colored 
  rock, 
  

   chiefly 
  labradorite, 
  with 
  considerable 
  pyrite 
  and 
  occasionally 
  grains 
  

   of 
  quartz. 
  The 
  labradorite 
  of 
  the 
  rock 
  along 
  Moose 
  creek 
  has 
  

   weathered 
  to 
  a 
  brilliant 
  brick 
  red 
  (143 
  B 
  & 
  C). 
  

  

  