Givetian
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The Givetian is one of two faunal stages in the Middle Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Eifelian Stage and followed by the Frasnian Stage. It is named after the town of Givet in France. The oldest forests occurred during the late Givetian. The lower GSSP is located at Jebel Mech Irdane, Tafilalt, Morocco.
Key facts
- Geologic timespan.name
- Givetian
- Geologic timespan.color
- Givetian
- Geologic timespan.time_start
- 387.95
- Geologic timespan.time_start_uncertainty
- 1.04
- Geologic timespan.time_end
- 382.31
- Geologic timespan.time_end_uncertainty
- 1.36
- 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 Polygnathus hemiansatus
- Geologic timespan.lower_gssp_location
- Jebel Mech Irdane, Tafilalt, Morocco
- Geologic timespan.lower_gssp_accept_date
- 1994
- Geologic timespan.upper_boundary_def
- FAD of the conodont Ancyrodella rotundiloba
via Wikipedia infobox
Described at
GIVETIAN | Université de Liège
popups.uliege.be →The Givetian Stage in the Givet area is represented by the main part of the Hanonet Fm, the Trois-Fontaines Fm, the Terres d'Haurs Fm, the Mont d'Haurs Fm, the Fromelennes Fm and the lowest part of the Nismes Fm. During Eifelian-Givetian transition, the sedimentary systems evolved from a mixed siliciclastic-carbonate ramp to a carbonate platform dominated by cyclic tidal-flat and lagoonal wackestones with local patch reefs or coralgal banks. The shelf had an ESE-WNW trend and extended from the Avesnois basin (northern France) in the west to Aachen (western Germany). The sedimentation in the Ardennes consists of shallow water regressive metric (around 5 m or less) cycles. Stromatopores, corals, brachiopods, algae and cyanobacteria are abundant. Due to this general shallow water setting, the base of the Givetian Stage has been defined by the IUGS Subcommission on Devonian Stratigraphy in a GSSP in southern Morocco referring to the first occurence of the condodont species Polygnathus hemiansatus . The conodont species Icriodus obliquimarginatus appears approximately at the same level in Belgium. Royal Belgian Institute of Natural Sciences, Department of Palaeontology, Vautierstraat, 29, B-1000 Brussels, Belgium; E-mail: [email protected]. Laboratoire de Paléontologie stratigraphique, Faculté Libre des Sciences, rue de Toul, 13, F-59046 Lille cedex, France; E-mail: [email protected].
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Encyclopedic overview
3 sectionsContents
- Name and definition
- References
- Further reading
The Givetian is one of two faunal stages in the Middle Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Eifelian Stage and followed by the Frasnian Stage. It is named after the town of Givet in France. The oldest forests occurred during the late Givetian. The lower GSSP is located at Jebel Mech Irdane, Tafilalt, Morocco.
== Name and definition == The Givetian Stage was proposed in 1879 by French geologist Jules Gosselet and was accepted for the higher stage of the Middle Devonian by the Subcommission on Devonian Stratigraphy in 1981.
Excerpted from Wikipedia’s “Givetian” article, available under the CC BY-SA 4.0 licence.
On the map
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