BabelNet

bn:00040167n

Noun Concept

Categories: Geochronology, Geologic time scales, Geology, Geological periods, Units of geologic time by rank

period geological period epoch era geologic period

A unit of geological time during which a system of rocks formed WordNet 3.0

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A unit of geological time during which a system of rocks formed WordNet 3.0 & Open English WordNet

A geological period is one of the several subdivisions of geologic time enabling cross-referencing of rocks and geologic events from place to place. Wikipedia

A subdivision of geologic time Wikipedia Disambiguation

Subdivision of geological time; shorter than an era and longer than an epoch Wikidata

A period of time in history seen as a single coherent entity. OmegaWiki

The length of time during which the same characteristics of a periodic phenomenon recur, such as the repetition of a wave or the rotation of a planet. Wiktionary

Ganoid fishes swarmed during the earlier geological periods WordNet 3.0 & Open English WordNet

IS A

geological time

geochronological unit

HAS PART

PART OF

HAS KIND