Pontium

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The pontium (also pontia or shortened to pont) is a regional chronostratigraphic stage of the Upper Miocene ( Neogene ) in the central Paratethys area. The pontium is correlated with the international chronostratigraphic degree of the Messinium . Thus it corresponds approximately to the period 7.246 (+/- 0.005) million to 5.332 (+/- 0.005) million years (for a different dating see). It is above the regional level of the Pannonian and is being replaced by the Dacium , which was part of the international series of the Pliocene heard.

Naming and stratotype

The name comes from the Latin name Pontus Euxinus for the Black Sea. The stage was proposed by Pierre Guilleaume Fréderic Le Play in 1842.

definition

In the stratigraphic table of Austria the pontium is correlated with the entire messinium . In contrast, the Dutch-Romanian team of authors Snel, Mărunţeanu, Macaleţ, Meulenkamp and van Vugt are of the opinion that the pontium only corresponds to the upper part of the messinium. The pontium is used in the older literature z. Sometimes also referred to as Upper Pannon , because stratigraphic similarities to the Pannonian and Vienna basins can be recognized, and occasionally also to tertiary coal mining areas in Styria (?).

Breakdown

The pontium is divided into the three regional sub-levels of the

  • Bosphorium,
  • Portafferium and
  • Novorossium (= Odessium)

divided. However, these terms are used less often.

Tectonics at the time of the pontium

In the time of the Pontium, the Alpid mountain formation came to an end. In the course of this, the Paratethys formed from the Black Forest to the Black Sea and slowly silted up as it progressed eastwards . The climate was still warm (before the Quaternary Ice Ages).

credentials

  1. ↑ Snel et al., 2006: 6.15 ± 0.11 to 5.30 ± 0.1 million years

literature

  • Frédéric LePlay: Formation tertiaire de la steppe pontique. In: Anatolij Nikolaevič Demidov (ed.): Voyage dans la Russie méridionale et la Crimée. Volume 4, pp. 150-168, St. Petersburg 1842
  • Hans Murawski & Wilhelm Meyer: Geological dictionary . 10., rework. u. exp. Ed., 278 p., Enke Verlag, Stuttgart 1998 ISBN 3-432-84100-0 .
  • E. Snel, M. Mărunţeanu, R. Macaleţ, JE Meulenkamp and N. van Vugt: Late Miocene to Early Pliocene chronostratigraphic framework for the Dacic Basin, Romania. Palaeogeography, Palaeoclimatology, Palaeoecology, 238: 107-124, Amsterdam 2006 ISSN  0031-0182

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