1800 – 1600 Ma
Map of Earth during the Statherian, c. 1740 Ma
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Chronological unitPeriod
Stratigraphic unitSystem
Time span formalityFormal
Lower boundary definitionDefined chronometrically
Lower GSSA ratified1991
Upper boundary definitionDefined chronometrically
Upper GSSA ratified1991

The Statherian Period (/stəˈθɪəriən/; Ancient Greek: σταθερός, romanizedstatherós, meaning "stable, firm") is the final geologic period in the Paleoproterozoic Era and lasted from 1800 Mya to 1600 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.

The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of current values.

Rafatazmia, controversially claimed to be present in Statherian beds in India, may be the oldest known confirmably eukaryotic fossil organism.

By the beginning of the Statherian, the supercontinent Columbia had assembled.

Approximately 1.7 billion years ago, a series of natural nuclear fission reactors was operational in what is now Oklo, Gabon.

See also

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