1 large block of phylite-(quartz+chlorite+muscovite), 1 piece of quartzite-dark gray. Has been subjected to metamorphism, slight schistosity visible. (graywacke?) biotite. All rocks are coated with a layer of manganese oxide.
Cite the IMLGS database as: Curators of Marine and Lacustrine Geological Samples Consortium. The Index to Marine and Lacustrine Geological Samples (IMLGS). National Geophysical Data Center, NOAA. doi:10.7289/V5H41PB8 [date of access].