Middle Miocene (Upper Badenian/Sarmatian) Palaeoecology and Evolution of the Environments in the Area of Medvednica Mt. (North Croatia)

Geologia Croatica

Radovan Avanić¹  Valentina Hajek-Tadesse¹  Mato Brkić¹  Nenad Kurtanjek¹  Mirjana Miknić¹  Ivan Hećimović¹  Davor Vrsaljko²  Marijan Kovačić³  Davor Pavelić⁴ 

[1] Croatian Geological Survey;Croatian Natural History Museum;Department of Geology, Faculty of Science;Faculty of Mining, Geology and Petroleum Engineering;

关键词: Middle Miocene;    Palaeoecology;    Environments;    Stratigraphic Boundaries;    Medvednica Mt.;    North Croatia, Central Paratethys;   

DOI  :  10.4154/GC.2006.04

来源: DOAJ

【 摘 要 】

In the area of Medvednica Mt., the Upper Badenian and Sarmatian

deposits are divided into four facies associations: (A) deposits of a

small carbonate platform represented by breccia, conglomerates, biocalcirudites,

biocalcarenites and biocalclutites; (B) open-sea deposits

composed of marls with intercalations of clay; (C) nearshore deposits

of reduced salinity composed of conglomerates, sandstones, biocalcarenites, biocalcirudites and biocalclutites, and (D) lagoonal deposits represented by spongitic calclutites with clay, marl and sand intercalations.

Deposits of these facies associations contain numerous and very

diverse fossil species with very different palaeoecological characteristics,

from shallow- and deeper-water normal marine to shallow- and

deeper-water environment of reduced salinity, even of fresh-water.

The transition from Late Badenian to Sarmatian deposition was

characterized by three different unconformities and one conformity.

Unconformities are located between different lithologies reflecting

an amount of uplifting and erosion at the end of the Badenian. The

occurrence of an angular unconformity suggests the influence of local

tectonics.

The Middle Miocene deposition shows different local variations

but generally fits with the evolution of Central Paratethys and the

Pannonian Basin System.

【 授权许可】

Unknown