Balogh Zoltán (szerk.): Neograd 2014-2015. R. Várkonyi Ágnes (1928-2014) emlékére - A Dornyay Béla Múzeum Évkönyve 38. (Salgótarján, 2015)

Természettudomány - Hír János: Előzetes beszámoló a Kozárdi Formáció típusszelvényéből gyűjtött gerinces maradványokról

JÁNOS HÍR

A PRELIMINARY REPORT ON THE VERTEBRATE FINDS COLLECTED FROM THE TYPE SECTION OF THE KOZÁRD FORMATION

The type-section of the Kozárd Formation is found North of the vilage of Kozárd, by the road leading to Nagymező-puszta. The lithostratigraphical unit was described by Hámor (1985). He classified Sarmatian coastal and shallow marine sediments as members of the unit. The limestones, calcareous sands and marls of the Kozárd section are extremely rich in fossil molluscs. This fauna was studied by Boda (1959, 1974). The Foraminifera fauna was studied by Jankovich and Koreczné Laky in Hámor (1985).

Up to 2014 vertebrate finds had not been reported from the Kozárd section. In 2014 the author found a 15 cm thick dark gray diatomaceous layer containing carbonized plant remains and mollusc shells. It is presumed that this layer was deposited during a regression, in marshy environment. The screenwashing of the sediment produced the above described microvertebrate material. The majority of the rodent taxa reflect forest environment, but the dominant element Cricetodon cf. klariankae needed dry scrub vegetation.

From biochronological point of view we can classify the fauna as belonging to the MN7/8 zone. The importance of the Kozárd microvertebrate finds is their interbedded position into a marine section with rich invertebrate findmaterial. This fauna opens the door for the harmonization of the traditional Paratethys stratigraphy and vertebrate biochronology.

Tóth & Csoma (2015) studied the Foraminifera and ostracoda fauna of the vertebrate bearing layer of the Kozárd section. They classified the early Sarmatian Elphidmm reginum Zone.

Among the Sarmatian vertebrate faunas of the Carpathian Basin which were studied during the last decade Gratkorn (Austria) refers to the Elphidmm haaerinum Zone, while Várciorog (W. Romania) and Kozárd (Hungary) refer to the Elphidium reginum Zone. The field campaign was continued in 2015.

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