Aquitanium

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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 Aquitanium (in German usage mostly shortened to Aquitan or referred to as Aquitan level) is the lowest chronostratigraphic level of the Miocene ( Neogene ) in the history of the earth . In absolute numbers ( geochronologically ) the stage covers the period from about 23.03 to about 20.44 million years. The stage comes after the Chattium and is followed by the Burdigalium .

Naming and history

The name of the stage is derived from the Latin name of Aquitaine ( France ). The level and name were introduced into scientific literature in 1853 by the Swiss geologist and paleontologist Karl Mayer-Eymar .

Definition and GSSP

The lower limit of the level is characterized by several events: the base of the magnetic polarity chronozone C6Cn.2n, the first appearance of the foraminifera species Paragloborotalia kugleri and the extinction of the calcareous nannoplankton species Reticulofenestra bisecta (base of the nannoplankton zone NN1). The end is defined by the first appearance of the foraminifera species Globigerinoides altiaperturus or the upper limit of the magnetic polarity chronozone C6An. The reference profile established by the International Commission for Stratigraphy (GSSP = Global Stratotype Section and Point) is the Lemme-Carrosio profile near Carrosio , north of Genoa in Italy .

literature

  • Felix Gradstein, Jim Ogg, Jim & Alan Smith: A Geologic timescale. Cambridge University Press 2004 ISBN 978-0-521-78673-7
  • Karl Mayer-Eymar: Attempting a new classification of the tertiary structures of Europe . Negotiations of the Swiss Natural Research Society. (Annual meeting in Trogen, August 17–19, 1857), pp. 70–71 et 165–199, Basel table 1858.
  • Hans Murawski & Wilhelm Meyer: Geological dictionary . 10., rework. u. exp. Ed., 278 p., Enke Verlag, Stuttgart 1998 ISBN 3-432-84100-0 .
  • FF Steininger, MP Aubry, WA Berggren, M. Biolzi, AM Borsetti, JE Cartlidge, F. Cati, R. Corfield, R. Gelati, S. Iaccarino, C. Napoleone, F. Ottner, F. Rogl, R. Roetzel , S. Spezzaferri, F. Tateo, G. Villa and D. Zevenboom: The Global Stratotype Section and Point (GSSP) for the base of the Neogene . Episodes, 20 (1): 23-28 Beijing 1997 ISSN  0705-3797 .

Web links