Specimen Number46-4-035CommentsResembles vesicular basalt, but is likely Mn-oxide. Need XRD to evaluate mineralogy.In Teaching CollectionNoMineral(s)mn-oxideRock NameMn oreDistrictTarkwaMineNsutaExternal LinkMindatDeposit TypeMetamorphosed ExhaliteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience