period of time in natural history
type: Concept
narrower: climatic periods
preferred label: luonnontieteellinen ajanjakso @fi

geological eras
type: Concept
preferred label: geologiska perioder @sv
preferred label: geologiset kaudet @fi
related: climatic periods

ages
type: Concept
preferred label: aikakaudet @fi
preferred label: tidsperioder @sv
related: climatic periods

climatic changes
type: Concept
preferred label: ilmastonmuutokset @fi
preferred label: klimatförändringar @sv
related: climatic periods

ice ages
type: Concept
preferred label: jääkaudet @fi
preferred label: istider @sv
related: climatic periods

climatic periods
type: Concept
broader: period of time in natural history
in scheme: conceptscheme
preferred label: ilmastokaudet @fi
preferred label: klimatperioder @sv
related: ages
related: ice ages
related: geological eras
related: climatic changes
scope note: Namnen på olika klimatperioder kan användas som ämnesord, t.ex. boreal tid @sv
scope note: Ilmastokausien nimiä voi käyttää asiasanoina, esim. boreaalikausi