Littleton formation Quartzite
Credit Line: Mineralogical and Geological Museum at Harvard University
Object number: BILLINGS-W-222
DescriptionQuartzite consisting of 72% quartz, 13% biotite (≤ 0.5 mm), 6% plagioclase, 4% muscovite (≤ 2 mm), 4% sillimanite, 1% garnet, and trace amounts of apatite and magnetite. Faint foliation is present with darker minerals.