﻿176 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  somewhat 
  atoning 
  for 
  this 
  neglect, 
  analyses 
  have 
  been 
  prepared 
  of 
  

   four 
  samples 
  of 
  granites 
  of 
  the 
  region, 
  as 
  shown 
  in 
  the 
  following 
  

   table 
  : 
  

  

  Si02 
  . 
  . 
  

   AI2O3. 
  

   FegOs. 
  

   FeO. 
  . 
  

   MgO.. 
  

   CaO. 
  . 
  

   NaaO. 
  

   K2O. 
  . 
  

   H2O 
  + 
  

   H2O— 
  

   Ti02... 
  

   Zr02.. 
  

   P2O5.. 
  

   CI. 
  . 
  .. 
  

  

  F 
  

  

  S 
  

  

  MnO.. 
  

   BaO. 
  . 
  

  

  76.56 
  

  

  12.95 
  

  

  .16 
  

  

  •37 
  

  

  .24 
  

  

  1.30 
  

  

  3-90 
  

   4-23 
  

  

  •25 
  

  

  .06 
  

  

  .04 
  

   •03 
  

   .02 
  

   .02 
  

   .02 
  

  

  76.41 
  

  

  12 
  .41 
  

  

  1 
  .01 
  

  

  •50 
  

  

  .46 
  

  

  .78 
  

  

  •34 
  

   •33 
  

   •34 
  

   •13 
  

   •03 
  

   .02 
  

  

  .01 
  

   .01 
  

   .06 
  

  

  100.15 
  

  

  99.84 
  

  

  73 
  

   13 
  

  

  I 
  

  

  I 
  

   5 
  

   3 
  

  

  33 
  

  

  11 
  

  

  53 
  

   45 
  

   66 
  

   01 
  

   12 
  

  

  45 
  

   17 
  

  

  

  

  

  

  

  

  

  

  

  04 
  

  

  99 
  

  

  73.10 
  

  

  14.29 
  

  

  1 
  .04 
  

  

  1 
  .04 
  

  

  •53 
  

  

  1. 
  18 
  

  

  3.08 
  

  

  5-36 
  

  

  •54 
  

  

  .07 
  

  

  .18 
  

  

  •03 
  

   •03 
  

   .02 
  

   .02 
  

   .07 
  

  

  100.58 
  

  

  70 
  

  

  13 
  

  

  15 
  

  

  47 
  

  

  I 
  

  

  52 
  

  

  I 
  

   I 
  

  

  85 
  

   60 
  

  

  3 
  

  

  72 
  

  

  4 
  

  

  39 
  

   48 
  

  

  

  01 
  

  

  

  30 
  

  

  

  05 
  

  

  

  09 
  

  

  

  07 
  

   08 
  

  

  

  05 
  

  

  99.86 
  

  

  66.59 
  

  

  14-54 
  

   2 
  .42 
  

  

  2.43 
  

   1. 
  18 
  

  

  2-15 
  

  

  3.08 
  

  

  5.62 
  

  

  .46 
  

  

  *".8i 
  

  

  .40 
  

  

  •03 
  

   .06 
  

   .08 
  

   •23 
  

   •17 
  

  

  100 
  .25 
  

  

  Note. 
  Cr203 
  and 
  CO2 
  absent 
  in 
  nos. 
  i, 
  4, 
  5 
  and 
  6. 
  

  

  1 
  White 
  (bleached) 
  granite 
  near 
  limestone, 
  i 
  mile 
  north 
  of 
  Redwood 
  

   (5K10, 
  Alexandria 
  sheet), 
  from 
  a 
  small 
  boss 
  of 
  Laurentian 
  granite 
  gneiss. 
  

   Analysis 
  by 
  E. 
  W. 
  Morley. 
  

  

  2 
  Morris 
  granite 
  of 
  Long 
  Lake 
  quadrangle, 
  one 
  of 
  the 
  later 
  granites 
  of 
  

   the 
  region. 
  N. 
  Y. 
  State 
  Mus. 
  Bui. 
  115, 
  p. 
  511. 
  

  

  3 
  Laurentian 
  granite 
  gneiss 
  from 
  the 
  Methuen 
  bathylith 
  of 
  central 
  On- 
  

   tario. 
  F. 
  D. 
  Adams, 
  Jour. 
  Geol. 
  17:17- 
  

  

  4 
  Laurentian 
  granite 
  gneiss 
  of 
  the 
  Alexandria 
  bathylith, 
  ^ 
  mile 
  south 
  

   of 
  Alexandria 
  Bay 
  (6E5, 
  Alexandria 
  sheet), 
  analysis 
  by 
  E. 
  W. 
  Morley. 
  

  

  5 
  Laurentian 
  granite 
  gneiss 
  of 
  Antwerp 
  bathylith, 
  2 
  miles 
  east 
  of 
  Theresa 
  

   (i6M4b, 
  Theresa 
  sheet), 
  chosen 
  for 
  analysis 
  because 
  of 
  apparent 
  slight 
  

   digestion 
  of 
  amphibolite. 
  E. 
  W. 
  Morley, 
  analj^st. 
  ^ 
  • 
  j 
  

  

  6 
  Picton 
  granite, 
  from 
  a 
  quarry 
  i 
  mile 
  southeast 
  of 
  Grmdstone, 
  Grmd- 
  

   stone 
  island 
  (2F3, 
  Grindstone 
  sheet). 
  Analysis 
  by 
  E. 
  W. 
  Morley. 
  

  

  That 
  the 
  granite 
  gneisses 
  hold 
  abundant 
  amphibolite 
  inclusions 
  in 
  

   various 
  stages 
  of 
  digestion, 
  so 
  that 
  the 
  rock 
  is 
  quite 
  variable 
  in 
  

   composition, 
  has 
  already 
  been 
  stated. 
  The 
  rock 
  of 
  analysis 
  4 
  was 
  

   carefully 
  selected 
  as 
  representative 
  of 
  the 
  normal, 
  acid 
  phase 
  of 
  

   the 
  rock, 
  free 
  from 
  amphibolite 
  contamination. 
  It 
  is 
  a 
  quite 
  normal, 
  

   rather 
  acid 
  granite, 
  and 
  comparison 
  with 
  analysis 
  3 
  shows 
  close 
  

   agreement 
  except 
  that 
  the 
  relative 
  proportions 
  of 
  the 
  alkalies 
  are 
  

  

  