Statherian

The Statherian (pron.: /stəˈθɪəriən/; Greek: statheros, 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 is characterized on most continents by either new platforms or final cratonization of fold belts.

The supercontinent Columbia formed at the beginning of this period.

References

• "Statherian Period". GeoWhen Database. Archived from the original on May 12, 2006. Retrieved January 5, 2006. 
• James G. Ogg (2004). "Status on Divisions of the International Geologic Time Scale". Lethaia 37 (2): 183–199. doi:10.1080/00241160410006492. 

Preceded by Archean Eon	2.5 Ga - Proterozoic Eon - 542 Ma										Followed by Phanerozoic Eon
	2.5 Ga - Paleoproterozoic Era -1.6 Ga				1.6 Ga - Mesoproterozoic Era -1.0 Ga			1.0 Ga - Neoproterozoic Era -542 Ma
	Siderian	Rhyacian	Orosirian	Statherian	Calymmian	Ectasian	Stenian	Tonian	Cryogenian	Ediacaran