A1: Middle Miocene sedimentary environment and facies along the northern shore of the Central Paratethys influenced by tidal processes and volcanic activity

3 days, June 19–21, 2021, Slovakia; Trip leaders: Kováč M.1, Rybár S.1, Šujan M.1, Starek D.2
1Comenius University, Slovakia; 2Slovak Academy of Sciences, Slovakia
Contact: michal.sujan@uniba.sk
Price: 495 EUR
Transportation: bus; Participants: Minimum 15, Maximum 25.
Departure: Prague, Hotel Diplomat (5:00) / 9:00 Bratislava (Slovakia), Hant Arena bus station (9:00), participants can decide for one of the options; field trip stops will follow after picking up of participants in Bratislava; Return: Prague, Hotel Diplomat
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets, snacks and dinners.
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (within 1km distance), frequently on unpaved quarry floors (trekking shoes are recommended). Hard hats will be provided.
The history of the Central Paratethys will be illustrated by a transect through the Danube, Novohrad-Nógrád (NNB) and the Fiľakovo-Pétervasára basins (FPB). Onset of deposition in the FBS was characterized by deltaic to tide dominated coasts during the early Burdigalian - Ottnangian. These sediments are covered by a rhyolite tuff which represents the Ottnangian-Karpatian boundary (~17.4 Ma). The Karpatian sedimentation in NNB is characterized by middle to outer shelf muds and heteroliths with coal seams and fluvial deposits at the basin margin. They display a gradual decrease in salinity, possibly induced by the closure of the Western Paratethys. Marine deposition occurs again in the early Badenian – Langhian. In the NNB, sandy tidal facies were deposited. Badenian marine environments in the Danube Basin reached from inner shelf settings with Lithotamnium reefs to stable submarine plateau muds. The demise of the fully marine setting took place at the end of the Badenian stage - Serravallian (Badenian–Sarmatian extinction event). The depositional environments soon changed to brackish and fluvio-deltaic. Andesite tuffs produced at that time serve as marker beds. The Sarmatian is characterized by see-grass meadows, marshes and sandy deltas that spread along the basin margin.
Left: Príbelce - tidal bundles and symmetrical ripples; Right: Tidally influenced channel fill, middle Miocene (Sarmatian), Podlužany Quarry.
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