Famennian

System/
Period		 Series/
Epoch		 Stage/
Age		 Age (Ma)
Carboniferous Mississippian Tournaisian younger
Devonian Upper/
Late		 Famennian 358.9 372.2
Frasnian 372.2 382.7
Middle Givetian 382.7 387.7
Eifelian 387.7 393.3
Lower/
Early		 Emsian 393.3 407.6
Pragian 407.6 410.8
Lochkovian 410.8 419.2
Silurian Pridoli no faunal stages defined older
Subdivision of the Devonian system
according to the ICS, as of 2017.[1]

The Famennian is the latter of two faunal stages in the Late Devonian epoch. It lasted from 372.2 million years ago to 358.9 million years ago. It was preceded by the Frasnian stage and followed by the Tournaisian stage.

It was during this age that tetrapods first appeared. In the seas, a novel major group of ammonoid cephalopods called clymeniids appeared, underwent tremendous diversification and spread worldwide, then just as suddenly went extinct.

The beginning of the Famennian is marked by a major extinction event, the Kellwasser Event, and the end with a smaller but still quite severe extinction event, the Hangenberg Event.

North American subdivisions of the Famennian include the Chautauquan, Canadaway, Conneaut, Conneautan, Conewango and Conewangan.

Name and definition

The Famennian stage was proposed in 1855 by Belgian geologist André Hubert Dumont and was accepted for the upper stage of the Upper Devonian by the Subcommission on Devonian Stratigraphy in 1981.[2] It is named after Famenne, a natural region in southern Belgium.

Palaeontology

Fish

Cartilaginous fish

Cartilaginous fish of the Fammenian
Taxa Presence Location Description Images

Placoderms

Placoderms of the Fammenian
Taxa Presence Location Description Images

Sarcopterygians

Tetrapodomorphs
Tetrapodomorphs of the Fammenian
Taxa Presence Location Description Images
Catskill Formation, Red Hill Shale, Pennsylvania

Tetrapods

Tetrapods of the Fammenian
Taxa Presence Location Description Images

Amphibians

Amphibians of the Fammenian
Taxa Presence Location Description Images
Andreyevka, Tula Oblast, Russia

References

  1. ↑ http://www.stratigraphy.org/index.php/ics-chart-timescale
  2. ↑ Thorez, Jacques; Dreesen, Roland; Streel, Maurice (2006). "Frasnian". Geologica Belgica. 9 (1–2): 27–45. Retrieved 16 March 2013.

See also


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