sedimentary fungus are formed by metals / mutualism that unsettle compacting / cementing together
fungus is fungus. clavicipitaceae is not fungus. rubidium is unalloyed_metal. tungsten is unalloyed_metal. clavicipitaceae is fungus. wood_decay_fungus is not fungus. basidiomycete is fungus. wood_decay_fungus is fungus. basidiomycota is fungus. rust is fungus.