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Wordian

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 and million years ago (Ma). It was preceded by the Roadian and followed by the Capitanian.

Key facts

Geologic timespan.name: Wordian
Geologic timespan.color: Wordian
Geologic timespan.time_start: 266.9
Geologic timespan.time_start_uncertainty: 0.4
Geologic timespan.time_end: 264.28
Geologic timespan.time_end_uncertainty: 0.16
Geologic timespan.timeline: Permian
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: Age
Geologic timespan.strat_unit: Stage
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: FAD of the Conodont Jinogondolella aserrata
Geologic timespan.lower_gssp_location: Guadalupe Pass, Guadalupe Mountains, Texas, USA
Geologic timespan.lower_gssp_accept_date: 2001
Geologic timespan.upper_boundary_def: FAD of the Conodont Jinogondolella postserrata

via Wikipedia infobox

Article

7 sections

Contents

Stratigraphy
Biostratigraphy
Wordian life
Notable formations
References
Literature
External links

==Stratigraphy== The Wordian Stage was introduced into scientific literature by Johan August Udden in 1916 and was named after the Word Formation of the North American Permian Basin. The Wordian was first used as a stratigraphic subdivision of the Guadalupian in 1961, when both names were still only used regionally in the southern US. The stage was added to the internationally used ISC timescale in 2001.