Orosirian
Sign in to saveAlso known as Orosirian Period, Orosirian System
The Orosirian (; , meaning "mountain range") is the third geologic period in the Paleoproterozoic Era. It spans 250 million years and lasted from to million years ago (Ma), following the Rhyacian Period and preceding the Statherian Period. Instead of being based on stratigraphy, these dates are defined chronometrically.
Key facts
- Geologic timespan.name
- Orosirian
- Geologic timespan.color
- Orosirian
- Geologic timespan.top_bar
- all time
- Geologic timespan.image_map
- 2000 Ma paleoglobe.png
- Geologic timespan.caption_map
- A map of Earth as it appeared during the early Orosirian, c. 2 Ga
- Geologic timespan.timeline
- Orosirian
- Geologic timespan.name_formality
- Formal
- Geologic timespan.celestial_body
- earth
- Geologic timespan.usage
- Global (ICS)
- Geologic timespan.timescales_used
- ICS Time Scale
- Geologic timespan.chrono_unit
- Period
- Geologic timespan.strat_unit
- System
- Geologic timespan.timespan_formality
- Formal
- Geologic timespan.lower_boundary_def
- Defined chronometrically
- Geologic timespan.upper_boundary_def
- Defined chronometrically
via Wikipedia infobox
Wikidata facts
- Instance of
- system
- Named after
- mountain range
- Followed by
- Statherian
- Follows
- Rhyacian
Show 5 more facts
- start time
- 2050000000
- end time
- 1800000000
- sRGB color hex triplet
- F76898
- Commons category
- Orosirian
- IPA transcription
- /ˌɒroʊˈsɪəriən/
Sources (2)
via Wikidata · CC0
~1 min read
Encyclopedic overview
4 sectionsContents
- History
- Paleogeography
- References
- Further reading
The Orosirian (; , meaning "mountain range") is the third geologic period in the Paleoproterozoic Era. It spans 250 million years and lasted from to million years ago (Ma), following the Rhyacian Period and preceding the Statherian Period. Instead of being based on stratigraphy, these dates are defined chronometrically.
== History == For the time period from about 2060 to 1780 Mya, an alternative period based on stratigraphy rather than chronometry, named the Columbian, was suggested in the geological timescale review 2012 edited by Gradstein et al., but , this has not yet been officially adopted by the IUGS.
Excerpted from Wikipedia’s “Orosirian” article, available under the CC BY-SA 4.0 licence.