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Definition 2024
Siderian
Siderian
English
Adjective
Siderian (comparative more Siderian, superlative most Siderian)
- (geology) Of a geologic period within the Paleoproterozoic era from about 2500 to 2300 million years ago.
Proper noun
Siderian
- (geology) The Siderian period.
Translations
Siderian period
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See also
- Appendix:Geologic timescale