Granodiorite
Credit Line: Mineralogical and Geological Museum at Harvard University
Object number: ROC122768
DescriptionCoarse-grained sample composed of plagioclase (≤ 1 cm), quartz (≤ 5 mm), muscovite (≤ 5 mm), biotite (≤ 3 mm), and hornblende. Darker patched are weathered surfaces.