Frasnian

Also known as Frasnian Stage, Frasnian Age

The Frasnian is one of two faunal stages in the Late Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Givetian Stage and followed by the Famennian Stage.

Key facts

Geologic timespan.name: Frasnian
Geologic timespan.color: Frasnian
Geologic timespan.time_start: 382.31
Geologic timespan.time_start_uncertainty: 1.36
Geologic timespan.time_end: 372.15
Geologic timespan.time_end_uncertainty: 0.46
Geologic timespan.image_map: 380 Ma plate tectonic reconstruction.png
Geologic timespan.caption_map: Paleogeography of the Late Devonian, 380 Ma
Geologic timespan.timeline: Devonian
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 Ancyrodella rotundiloba
Geologic timespan.lower_gssp_location: Col du Puech de la Suque, Montagne Noire, France

via Wikipedia infobox

Described at

FRASNIAN | Université de Liège

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The name Frasnian, which comes from the locality of Frasnes near Couvin in Belgium, was introduced by Gosselet in 1879 and was formally retained for the lower stage of the Upper Devonian by the Subcommission on Devonian Stratigraphy in 1981. The modern definition of the Frasnian is based on conodonts and the historical background of the stage is developed in detail herein. Data about the lithostratigraphy, sedimentology, biostratigraphy, chronostratigraphy and absolute age of the Frasnian can also been found in this contribution. Département de Paléontologie, Institut royal des Sciences naturelles de Belgique, rue Vautier 29, B-1000 Bruxelles; E-mail: [email protected]. U.R. Pétrologie sédimentaire, B20, Université de Liège, Sart Tilman, B-4000 Liège; E-mail: [email protected].

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Wikidata facts

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sRGB color hex triplet: F4EAB9
start time: 382700000-
end time: 372200000-
Commons category: Frasnian
described at URL: popups.uliege.be/1374-8505/index.php?id=1071

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The Frasnian is one of two faunal stages in the Late Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Givetian Stage and followed by the Famennian Stage.

Major reef-building was under way during the Frasnian Stage, particularly in western Canada and Australia. On land, the first forests were taking shape. In North America, the Antler orogeny peaked, which were contemporary with the Bretonic phase of the Variscan orogeny in Europe.