Burdigalium

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system series step ≈ age ( mya )
after that after that after that younger
Neogene Pliocene Piacenzium 2.588
⬍
3.6
Zancleum 3.6
⬍
5.333
Miocene Messinium 5.333
⬍
7,246
Tortonium 7,246
⬍
11.62
Serravallium 11.62
⬍
13.82
Langhium 13.82
⬍
15.97
Burdigalium 15.97
⬍
20.44
Aquitanium 20.44
⬍
23.03
before before before older

The Burdigalium (mostly shortened to Burdigal in German usage) is the second chronostratigraphic stage of the Miocene ( Neogene ) in geological history . In absolute numbers ( geochronologically ) the stage covers the period from about 20.44 to about 15.97 million years. The level follows the Aquitanium and is followed by the Langhium . Aquitanium and Burdigalium form the Lower Miocene.

Naming and history

The name of the stage is derived from the Latin name of Bordeaux (= Burdigala) ( France ). The stage and name were proposed and introduced into scientific literature by the French geologist Charles Depéret in 1892.

Definition and GSSP

The lower limit of the level is defined by the first appearance of the foraminifera species Globigerinoides altiaperturus or the upper limit of the magnetic polarity chronozone C6An. The stage ends with the first onset of the foraminifera species Praeorbulina glomerosa or the upper limit of the magnetic polarity chronozone C5Cn.1n. An official type profile of the International Commission for Stratigraphy (GSSP = "Global Stratotype Section and Point") has not yet been defined for this level.

literature

  • Charles Depéret: Note sur la classification et le parallélisme du Système miocène. Bulletin de la Societé Géologique de France, série 3, 20: CXLV-CLVI, Paris 1892 ISSN  0037-9409 .
  • Felix Gradstein, Jim Ogg, Jim & Alan Smith: A Geologic timescale. Cambridge University Press 2004 ISBN 978-0-521-78673-7
  • Hans Murawski & Wilhelm Meyer: Geological dictionary . 10., rework. u. exp. Ed., 278 p., Enke Verlag, Stuttgart 1998 ISBN 3-432-84100-0 .

Web links