|Subdivision of the Neogene Period|
according to the ICS, as of 2017.
The Burdigalian is, in the geologic timescale, an age or stage in the early Miocene. It spans the time between 20.43 ± 0.05 Ma and 15.97 ± 0.05 Ma (million years ago). Preceded by the Aquitanian, the Burdigalian was the first and longest warming period of the Miocene and is succeeded by the Langhian.
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, 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.
|Wikisource has original works on the topic: Cenozoic#Neogene|
- Depéret, C.; 1892: Note sur la classification et le parallélisme du Système miocène, Bulletin de la Societé 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.