Very coarse orthoclase-gabbra from near Duluth, Minnesota, 
Scale 10 dvameters Or dinary Laght- 
Sce pyes RE sd, om 268. 
Apatrte (i ; vlzgocdese (2/; orthoclase(a),; Celanzferous' magnetile (ed, 
diallage (sl, often uttered to uralstre hornblende (6/, und & Biridite 
> pyrite(t) ; pcher(P/ Surrounds ng the mag netrle anc pyrite and con- 
tarneng biotite seoazes ofa seooncdary reature [1a/. 
