Seismic stratigraphy of the Late Miocene sequence beneath Lake Balaton, Pannonian Basin, Hungary

Marco Sacchi, Renato Tonielli, Péter Dövényi, Ferenc Horváth, Orsolya Magyari, Tibor Cserny, Thomas M. McGee, Lorenzo Mirabile

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Abstract

This study is based on the interpretation of about 190 km of high-resolution, single-channel reflection seismic prolifes acquired on Lake Balaton during the GMS93-02 cruise in June of 1993. The seismic survey investigated the lakes subsurface at a maximum depth of about 200 msec down to the acoustic basement, which is represented by Sarmatian (Serravallian) strata. Seismic interpretation showed that the Balaton Quatemary deposits rest above a subhorizontal unconformity marks a major stratigraphic gap that practically encompasses the whole Pliocene and most of the Pleistocene. The Pannonian sequence in turn uncomformably overlies Sarmatian limestone and marl at a depth of 50 to 200 m. Sarmatian strata are truncated at the top by a mature (polycyclic) erosional surface that marks a stratigraphic gap spanning a few million years (about 12 to 9 Ma) and includes the amalgamation of two 3rd-order (with 106 year periodicities) sequence boundaries. These are the top of the Sarmatian sequence (Sar-1 SB) and the top of the lowermost Pannonian 3rd-order sequence (Pan-1 SB). Incised valleys with erosional terrace and channel fills are also recognized from the seismic record.

Original languageEnglish
Pages (from-to)63-88
Number of pages26
JournalActa Geologica Hungarica
Volume41
Issue number1
Publication statusPublished - Dec 1 1998

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ASJC Scopus subject areas

  • Geology

Cite this

Sacchi, M., Tonielli, R., Dövényi, P., Horváth, F., Magyari, O., Cserny, T., McGee, T. M., & Mirabile, L. (1998). Seismic stratigraphy of the Late Miocene sequence beneath Lake Balaton, Pannonian Basin, Hungary. Acta Geologica Hungarica, 41(1), 63-88.