^ « 



^ <D 



g a g a g a 



" n • Co- (-1 O • 



O tn .25 ,4 ^ .2 T, £ ." 



J.2 *" "m rri '" '^ V7 '=« 



5>^ 22_>;. ^ ^ >. 



<^ 



cS 



\^ ^ < '^ ^ < O ^ < 



2.0 53.02 46.98 52.3 5 47.7 5 2.57 51.9 45.8 1.5 



2.0 79.64 20.36 79.2 20.8 2.55 73.3 25.7 1.5 



2.0 84.90 15.10 84.6 15.4 2.56 76.9 21.5 1.2 



2.0 85.58 14.42 85.3 14.7 2.55 80.4 18.G 1.4 



2.0 86.51 13.49 86.2 13.8 2.55 80.6 18.5 1.7 



2.0 86.22 13.78 85.8 14.2 2.55 77.4 21.7 1.35 



75.6 24.4 67.2 30.8 2.0 



72.3 27.7 71.1 27.3 1.6 



5 Corrected for FeO. 



6 The specific gravity used for the microcline was 2.62 for all; that given 

 in the table is for the albite. 



137 



