﻿g6 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Minor 
  intrusives, 
  cutting 
  all 
  the 
  above 
  masses, 
  occur 
  as. 
  bosses 
  

   or 
  dikes 
  of 
  gabbro, 
  pegmatite, 
  or 
  diabase. 
  

  

  An 
  important 
  structural 
  feature 
  is 
  the 
  presence 
  of 
  numerous 
  

   normal 
  faults 
  which 
  have 
  greatly 
  dissected 
  the 
  region. 
  

  

  DESCRIPTION 
  OF 
  THE 
  GARNET 
  DEPOSITS 
  

   There 
  are 
  at 
  least 
  seven 
  localities 
  in 
  Warren 
  county 
  where 
  gar- 
  

   net 
  mining 
  has 
  been 
  carried 
  on 
  as 
  follows: 
  (i) 
  Rogers 
  (Bar- 
  

   ton) 
  mine 
  1 
  near 
  the 
  top 
  of 
  Gore 
  mountain 
  and 
  three 
  and 
  one-half 
  

   miles 
  west-southwest 
  of 
  North 
  Creek; 
  (2) 
  near 
  the 
  top 
  of. 
  Oven 
  

   mountain 
  and 
  four 
  miles 
  south 
  of 
  North 
  Creek 
  ; 
  (3) 
  the 
  Rexford 
  

   mine, 
  one 
  and 
  one-third 
  m'iles 
  a 
  little 
  east 
  of 
  south 
  of 
  North 
  

   Creek; 
  (4) 
  the 
  Parker 
  mine 
  just 
  southwest 
  of 
  Daggett 
  pond 
  and 
  

   four 
  and 
  one-half 
  miles 
  northwest 
  of 
  Warrensburg; 
  (5) 
  the 
  San- 
  

   ders 
  Brothers 
  mine 
  near 
  the 
  mouth 
  of 
  Mill 
  Creek 
  and 
  two 
  miles 
  

   east 
  of 
  Wevertown; 
  (6) 
  two 
  and 
  three-fourths 
  miles 
  north 
  of 
  

   North 
  Creek; 
  and 
  (7) 
  the 
  Hooper 
  mine 
  just 
  east 
  of 
  the 
  northern 
  

   portion 
  of 
  Thirteenth 
  lake. 
  Of 
  these, 
  only 
  the 
  Rogers, 
  Sanders 
  

   Brothers, 
  and 
  Hooper 
  mines 
  are 
  now 
  in 
  operation. 
  The 
  Rogers 
  

   and 
  Hooper 
  mines 
  lie 
  within 
  the 
  Thirteenth 
  Lake 
  quadrangle 
  and 
  

   the 
  others 
  within 
  the 
  North 
  Creek 
  quadrangle. 
  All 
  the 
  above 
  mines 
  

   have 
  been 
  visited 
  by 
  the 
  writer. 
  

  

  1 
  In 
  the 
  Rogers 
  mine 
  the 
  mode 
  of 
  occurrence 
  and 
  the 
  size 
  of 
  

   the 
  garnets 
  are 
  of 
  unusual 
  interest. 
  The 
  matrix 
  or 
  rock 
  carrying 
  

   the 
  garnets 
  is 
  a 
  gray, 
  medium 
  grained 
  gneiss 
  which, 
  in 
  thin 
  sec- 
  

   tion, 
  shows 
  : 
  20 
  per 
  cent 
  orthoclase 
  ; 
  20 
  per 
  cent 
  labradorite 
  ; 
  40 
  

   per 
  cent 
  hornblende; 
  15 
  per 
  cent 
  hypersthene 
  ; 
  3 
  per 
  cent 
  biotite 
  ; 
  

   together 
  with 
  a 
  little 
  magnetite 
  and 
  zoisite. 
  Imbedded 
  in 
  this 
  

   gray 
  matrix 
  are 
  numerous, 
  well-scattered, 
  translucent, 
  reddish- 
  

   brown 
  garnets, 
  those 
  with 
  diameters 
  up 
  to 
  five 
  or 
  six 
  inches 
  being 
  

   very 
  common, 
  while 
  the 
  largest 
  ones 
  taken 
  out 
  are 
  said 
  to 
  have 
  

   been 
  about 
  the 
  size 
  of 
  a 
  bushel 
  basket. 
  These 
  garnets, 
  which 
  

   are 
  of 
  the 
  almandite 
  variety, 
  are 
  always 
  pretty 
  badly 
  crushed 
  or 
  

   coarsely 
  granulated 
  and 
  they 
  never 
  show 
  crystal 
  outlines. 
  

  

  A 
  remarkable 
  feature 
  is 
  the 
  never 
  failing 
  occurrence 
  of 
  a 
  rim 
  

   or 
  envelop 
  of 
  pure, 
  black, 
  medium 
  grained 
  hornblende 
  crystals 
  

   which 
  completely 
  inclose 
  each 
  garnet. 
  Occasionally 
  a 
  half 
  inch 
  

  

  1 
  This 
  is 
  called 
  Moore's 
  mine 
  on 
  the 
  topographic 
  map. 
  

  

  