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Statherian

The Statherian (; , meaning "stable, firm") is the fourth and final geologic period in the Paleoproterozoic Era, lasting from to million years ago (Ma) and spanning 200 million years. It follows the Orosirian Period and precedes the Calymmian Period, with the latter belonging to the Mesoproterozoic Era. Instead of being based on stratigraphy, these dates are defined chronometrically.

Key facts

Geologic timespan.name: Statherian
Geologic timespan.color: Statherian
Geologic timespan.top_bar: all time
Geologic timespan.image_map: 1740 Ma paleoglobe.png
Geologic timespan.caption_map: Map of Earth during the Statherian, c. 1740 Ma
Geologic timespan.timeline: Statherian
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

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Further reading

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.