Egerium
The Egerium (also called Eger stage, Egeria or Eger for short) is a regional chronostratigraphic stage and the Oligocene / Miocene boundary in the central Paratethys area. It is about the upper part of the international chronostratigraphic stage of Chattiums and with the entire Aquitanium correlated stage. In absolute numbers, the egerium corresponds roughly to the period from 25.8 to 20.3 million years. In the central Paratethys, the regional level of the Egerium is superimposed by the regional level of the Kiscellium and by the regional level of the Eggenburgium .
Naming and stratotype
The step is named after the city of Eger in Hungary , near which the type profile (stratotype) is located. The name and stage were proposed jointly in 1968 by the Hungarian geologist Tamás Báldi and the Czech geologist Ján Senes .
definition
The lower limit is defined in the Paratethys area with the onset of the foraminifera species Miogypsina formosensis and Miogypsina septentrionalis . The upper limit is the onset of a typical scallop fauna, which is already to be placed in the Eggenburgium. It therefore corresponds to the upper part of the international chronostratigraphic Chattium level and the entire Aquitanium level.
literature
- Ján Seneš (Ed.): Chronostratigraphy and Neostratotypes Miocene of the central Paratethys . Volume VM 3 : Tamás Baldi: OM. Egeria. The Egerer, Pouzdřaner, Puchkirchener layer group and the Bretkaer formation. Publishing house of the Slovak Academy of Sciences, Bratislava 1975.