﻿98 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  shows: 
  20 
  per 
  cent 
  orthoclase 
  ; 
  25 
  per 
  cent 
  oligoclase 
  to 
  labrado- 
  

   rite 
  ; 
  50 
  per 
  cent 
  hornblende 
  ; 
  2 
  per 
  cent 
  biotite 
  ; 
  2 
  per 
  cent 
  mag- 
  

   netite 
  ; 
  together 
  with 
  a 
  little 
  pyrite, 
  zoisite, 
  and 
  apatite. 
  As 
  com- 
  

   pared 
  with 
  the 
  similar 
  rock 
  from 
  the 
  Rogers 
  mine 
  the 
  lack 
  of 
  

   hypersthene 
  is 
  noteworthy. 
  Imbedded 
  in 
  the 
  gray 
  matrix 
  are 
  

   numerous 
  shattered, 
  reddish-brown 
  garnets 
  (almandite) 
  which 
  

   range 
  in 
  size 
  up 
  to 
  several 
  inches 
  in 
  diameter. 
  Black 
  hornblende 
  

   rims 
  are 
  invariably 
  present 
  around 
  the 
  garnets. 
  

  

  This 
  garnet 
  rock 
  is 
  a 
  long, 
  narrow, 
  well-defined 
  inclusion 
  of 
  

   Grenville 
  gneiss 
  in 
  a 
  granitic 
  f 
  acies 
  of 
  the 
  great 
  syenite-granite 
  

   intrusive 
  body. 
  

  

  This 
  mine 
  has 
  not 
  been 
  worked 
  for 
  about 
  twenty 
  years. 
  After 
  

   blasting 
  out 
  the 
  garnet-bearing 
  rock 
  and 
  reducing 
  it 
  by 
  sledge 
  

   hammers, 
  the 
  garnets 
  were 
  picked 
  out 
  by 
  hand. 
  

  

  3 
  At 
  the 
  Rexford 
  mine 
  the 
  type 
  of 
  occurrence 
  is 
  much 
  like 
  that 
  

   of 
  Oven 
  mountain, 
  only 
  here 
  there 
  appear 
  to 
  be 
  several 
  smaller 
  

   inclusions 
  of 
  the 
  garnet-bearing 
  gneiss 
  instead 
  of 
  one, 
  and 
  the 
  

   country 
  rock 
  is 
  a 
  very 
  gneissoid 
  quartz-syenite. 
  Garnets 
  up 
  to 
  

   five 
  inches 
  across, 
  always 
  with 
  hornblende 
  rims, 
  were 
  noted. 
  

   There 
  are 
  several 
  mine 
  openings 
  but 
  none 
  have 
  been 
  worked 
  for 
  

   about 
  fifteen 
  years. 
  

  

  4 
  The 
  old 
  mine 
  on 
  the 
  Parker 
  farm 
  occurs 
  in 
  a 
  mixed 
  gneiss 
  

   area 
  with 
  granitic 
  syenite 
  and 
  Grenville 
  interbedded 
  parallel 
  to 
  

   the 
  foliation 
  strike. 
  These 
  bands 
  of 
  rock 
  are 
  often 
  twenty 
  to 
  

   forty 
  feet 
  wide, 
  one 
  of 
  them 
  being 
  made 
  up 
  of 
  a 
  nearly 
  pure, 
  

   granular, 
  medium 
  grained 
  mass 
  of 
  irregular 
  crystals 
  of 
  reddish- 
  

   brown 
  garnet 
  and 
  bright 
  green 
  pyroxene 
  (coccolite?). 
  About 
  

   twenty 
  years 
  ago 
  this 
  band 
  of 
  garnet 
  rock 
  was 
  mined, 
  crushed 
  

   and 
  put 
  into 
  barrels, 
  there 
  being 
  no 
  attempt 
  to 
  separate 
  the 
  py- 
  

   roxene 
  from 
  the 
  garnet. 
  

  

  5 
  At 
  the 
  Sanders 
  Brothers 
  mine 
  the 
  mode 
  of 
  occurence 
  is 
  

   very 
  similar 
  to 
  that 
  of 
  the 
  Parker 
  mine, 
  the 
  bands 
  of 
  Grenville 
  

   being, 
  however, 
  somewhat 
  less 
  pronounced 
  and 
  numerous. 
  The 
  

   rock 
  which 
  is 
  mined 
  is 
  pretty 
  badly 
  granulated 
  and 
  consists 
  

   mostly 
  of 
  intimately 
  associated 
  reddish-brown 
  garnet 
  and 
  green 
  

   pyroxene 
  (coccolite?) 
  in 
  small 
  grains, 
  with 
  sometimes 
  a 
  little 
  

   quartz 
  and 
  feldspar. 
  There 
  are 
  some 
  streaks 
  or 
  patches 
  of 
  nearly 
  

   pure 
  garnet. 
  Work 
  began 
  in 
  1907 
  on 
  the 
  south 
  side 
  of 
  the 
  creek, 
  

   but 
  now 
  all 
  the 
  mining 
  is 
  confined 
  to 
  the 
  north 
  side. 
  The 
  garnet- 
  

   pyroxene 
  rock 
  is 
  crushed, 
  put 
  into 
  bags, 
  and 
  shipped 
  to 
  all 
  parts 
  

   of 
  the 
  world. 
  

  

  