Sample 03MW0102 is an unfoliated quartz monzonite
with a composition of K-feldspar (50%), plagioclase (35%), quartz (8%),
chlorite (2%), biotite (2%), muscovite (1%), and trace sphene, epidote,
and oxides. There is little evidence of deformation in the sample.
Perthitic K-feldspar phenocrysts show fractures that are filled with
quartz. Intergrowths of plagioclase and K-feldspar are common.
Plagioclase is altered to sericite and sausserite. It is unclear as to
whether chlorite is intergrown with or replacing biotite