Wordian

Wordian
Wordian
Chronology
←	Permian-Triassic mass extinction event
←	end-Capitanian extinction event
←	Olson's Extinction
	Subdivision of the Permian according to the ICS, as of 2022.; Vertical axis scale: millions of years ago.;
Etymology
Name formality	Formal
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Age
Stratigraphic unit	Stage
Time span formality	Formal
Lower boundary definition	FAD of the Conodont Jinogondolella aserrata
Lower boundary GSSP	Guadalupe Pass, Guadalupe Mountains, Texas, USA; 31°51′57″N 104°49′58″W / 31.8658°N 104.8328°W
Lower GSSP ratified	2001
Upper boundary definition	FAD of the Conodont Jinogondolella postserrata
Upper boundary GSSP	Nipple Hill, Guadalupe Mountains, Texas, USA; 31°54′33″N 104°47′21″W / 31.9091°N 104.7892°W
Upper GSSP ratified	2001

In the geologic timescale, the Wordian is an age or stage of the Permian. It is the middle of three subdivisions of the Guadalupian Epoch or Series. The Wordian lasted between 266.9 and 264.28 million years ago (Ma). It was preceded by the Roadian and followed by the Capitanian.^[3]

^ "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
^ ^a ^b "GSSP for Roadian Stage". International Commission on Stratigraphy. Retrieved 13 December 2020.
^ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press