zonein TIMELINE

Paleoproterozoic

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Period Subdivision Timespan
Paleoproterozoic Statherian 1,800,000,000 to 1,600,000,000 years ago 
Orosirian 2,050,000,000  to 1,800,000,000 years ago
Rhyacian 2,300,000,000  to  2,050,000,000 years ago
Siderian 2,500,000,000 to 2,300,000,000 years ago