bn:00040167n
Noun Concept
Categories: Units of geologic time by rank, Geology, Geochronology, Geological periods, Geologic time scales
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period  geological period  epoch  era  geologic period
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A unit of geological time during which a system of rocks formed WordNet 3.0
English:
geology
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EN
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
EN
Ganoid fishes swarmed during the earlier geological periods WordNet 3.0 & Open English WordNet
WordNet 3.0 & Open English WordNet
Wikipedia
Wikidata
Wiktionary
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OmegaWiki
Wikidata Alias
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