EntityQ2916245· pop 13· linked from 172 articlesnoduleSign in to saveknot, mass, or lump of a mineral or mineral aggregate with a contrasting compositionConnectionsoceanEntitysilicon dioxideEntityconcretionEntityironEntitygeologyEntityInternational Standard Book NumberEntitycobaltEntitynickelEntitymineralEntitycoalEntityfossilEntityPoriferaEntityDalianCitylimestoneEntityflintEntitymineralogyEntitysedimentary rockEntitychalkEntitycalciteEntitypyriteEntityCategoriesMineralogyMineralsPetrologySedimentary rocks