Specimen Number48-2-028Alternate Number77-145CommentsMedium-grained equigranular granodiorite; quartz + k-spar + plagioclase + amphibole + biotite.In Teaching CollectionNoMineral(s)quartzk-sparplagioclaseamphibolebiotiteField NotesSample from PhD (U Michigan) of Dr. Phil Brown, longtime Professor of Geology at University of Wisconsin-Madison. Copy of field notes shown in photo below.Rock NamegranodioriteDistrictTungsten HillsMinePine CreekExternal LinkMindatGeo-LocationRidge orebody on surface.Deposit TypeSkarnGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience