Sample 03MW2617 is a granite containing K-feldspar
(40%), quartz (30%), plagioclase (20%), biotite (4%), chlorite (3%),
muscovite (1%), oxides (1%), and trace garnet, epidote, and sericite.
K-feldspar porphyries show intergrowths with plagioclase. Biotite is
being replaced by chlorite. Garnet, present in small amounts, is
fine-grained (0.1-0.4 mm) and commonly rimmed by muscovite. Muscovite
appears to cross-cut biotite, suggesting that it is probably a secondary
mineral. No foliation is recognized.