Burdigalian
| Burdigalian | ||
|---|---|---|
| 20.45 – 15.98 Ma | ||
| Chronology | ||
−24— – −22— – −20— – −18— – −16— – −14— – −12— – −10— – −8— – −6— – −4— – −2— | ||
Subdivision of the Neogene according to the ICS, as of 2024.[3] Vertical axis scale: Millions of years ago | ||
- Near FAD of the Planktonic Foraminiferan Globigerinoides altiaperturus
- Near top of magnetic polarity chronozone C6An
- Near top of magnetic polarity chronozone C5Cn.1n
- Near FAD of the Planktonic Foraminiferan Praeorbulina glomerosa
- La Vedova, Italy
- St. Peter's Pool, Malta
- Astronomically tuned ODP-core
The Burdigalian is, in the geologic timescale, an age or stage in the early Miocene. It spans the time between 20.45 Ma and 15.98 Ma (million years ago). Preceded by the Aquitanian, the Burdigalian was the first and longest warming period of the Miocene[4] and is succeeded by the Langhian.
Stratigraphic definition
[edit ]The name Burdigalian comes from Burdigala, the Latin name for the city of Bordeaux, France. The Burdigalian Stage was introduced in scientific literature by Charles Depéret in 1892.
The base of the Burdigalian is at the first appearance of foram species Globigerinoides altiaperturus and the top of magnetic chronozone C6An. As of 2016[update] , an official GSSP for the Burdigalian had not yet been assigned.
The top of the Burdigalian (the base of the Langhian) is defined by the first appearance of foram species Praeorbulina glomerosa and is also coeval with the top of magnetic chronozone C5Cn.1n.
Paleontology
[edit ]Famous Burdigalian palaeontologic localities include the Turritellenplatte of Ermingen in Germany and the Dominican amber deposits of Hispaniola.
Possible human evolutionary ancestors such as Victoriapithecus evolved during this time interval.
Palaeoclimatology
[edit ]Southwestern Africa began to desertify near the end of the Burdigalian, approximately 17 to 16 Ma.[5]
References
[edit ]Footnotes
[edit ]- ↑ Krijgsman, Wout; Garcés, Miguel; Langereis, Cor G.; Daams, R.; Van Dam, J.; Van Der Meulen, A. J.; Agustí, Jordi; Cabrera, Lluis (August 1996). "A new chronology for the middle to late Miocene continental record in Spain" . Earth and Planetary Science Letters. 142 (3–4): 367–380. Bibcode:1996E&PSL.142..367K. doi:10.1016/0012-821X(96)00109-4 . Retrieved October 2, 2025.
- ↑ Gregory J., Retallack (1997). "Neogene Expansion of the North American Prairie" . PALAIOS. 12 (4): 380–390. doi:10.2307/3515337. eISSN 1938-5323. ISSN 0883-1351. JSTOR 3515337 . Retrieved October 2, 2025.
- ↑ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy . December 2024. Retrieved October 23, 2025.
- ↑ Edward Petuch, Ph.D. Florida Atlantic University, Department of Geosciences."FAU Department of Geosciences". Archived from the original on 20 June 2010. Retrieved 2010年05月01日.
- ↑ Senut, Brigitte; Pickford, Martin; Ségalen, Loïc (21 June 2009). "Neogene desertification of Africa" . Comptes Rendus Géoscience . 341 (8–9): 591–602. doi:10.1016/j.crte.200903008. ISSN 1631-0713 . Retrieved 28 February 2026 – via Académie des Sciences Institut de France.
Literature
[edit ]
- Depéret, C.; 1892: Note sur la classification et le parallélisme du Système miocène, Bulletin de la Société Géologique de France 3(20), p. CXLV-CLVI. (in French)
- Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press.
External links
[edit ]
- GeoWhen Database - Burdigalian
- Neogene timescale, at the website of the subcommission for stratigraphic information of the ICS
- Neogene timescale at the website of the Norwegian network of offshore records of geology and stratigraphy
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