Thanetium

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system series step ≈ age ( mya )
higher higher higher younger
Paleogene Oligocene Chattium 23.03
⬍
28.1
Rupelium 28.1
⬍
33.9
Eocene Priobonium 33.9
⬍
38
Bartonium 38
⬍
41.3
lutetium 41.3
⬍
47.8
Ypresium 47.8
⬍
56
Paleocene Thanetium 56
⬍
59.2
Seelandium 59.2
⬍
61.6
Danium 61.6
⬍
66
deeper deeper deeper older

The Thanetium (abbreviated only Thanet or Thanet level) is the upper chronostratigraphic level of the Paleocene (within the Paleogene ) in the history of the earth . It is therefore equated with the Upper Paleocene . Geochronologically, the Thanetium covers the period from 59.2 to 56 million years. The Thanetium follows the Seelandium and is replaced by the Ypresium , the lowest stage of the Eocene .

The Paleocene / Eocene temperature maximum stood at the transition from the Thanetian to the Ypresian .

Naming and history

The step is named after the English island of Thanet ( Kent ), on which the type locality is located. The name was introduced to scientific literature in 1874 by the Swiss geologist Eugène Renevier .

Definition and GSSP

The base of the step was placed on the base of the Magnetic Polarity Chronozone C26n. The upper limit of the level (or the lower limit of the Ypresium level above) is defined by a negative carbon isotope horizon. A globally valid reference profile (GSSP = Global Stratotype Section and Point) for the basis of the Thanetium has not yet been ratified.

correlation

In the biostratigraphic structure of the European terrestrial paleogene with the help of land mammals (ELMMZ paleogene) the Thanetium corresponds to the lower part of the Neustrium . In the biostratigraphic structure of the East Asian terrestrial paleogene with the help of land mammals (ALMA), the Gashatan corresponds to the upper Thanetium.

literature

  • Felix M. Gradstein, Jim Ogg, Jim Smith, Alan Smith (Eds.): A Geologic timescale 2004 . 3rd edition. Cambridge University Press, Cambridge et al. 2004, ISBN 0-521-78673-8 .
  • Hans Murawski, Wilhelm Meyer: Geological dictionary . 10th revised and expanded edition. Enke Verlag, Stuttgart 1998, ISBN 3-432-84100-0 ( Enke paperback ).
  • Eugène Renevier : Tableau des terrains sédimentaires formés pendant les époques de la phase organique du globe terrestre . In: Bulletin de la Societé Vaudoise des Sciences Naturelles . 12/70: tableau III, 13/72, 1874, ISSN  0037-9603 , pp. 218-252.

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