geologiska perioder
type: Concept
preferred label: geological eras @en
preferred label: geologiset kaudet @fi
narrower: proterozooiska eran

proterozooiska eran
type: Concept
preferred label: proterotsooinen kausi @fi
preferred label: proterozoic era @en
broader: geologiska perioder
broader: prekambrium
in scheme: conceptscheme
broader generic: geologiska perioder
broader partitive: prekambrium

prekambrium
type: Concept
preferred label: prekambrinen maailmankausi @fi
preferred label: pre-cambrian era @en
narrower: proterozooiska eran