Paleogeographic evolution of the Late Miocene Lake Pannon in Central Europe

Magyar, Imre; Geary, Dana H.; Müller, Pál

doi:10.1016/s0031-0182(98)00155-2

Cited by 328 publications

(306 citation statements)

References 11 publications

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“…Formation of the Mecsekalja piedmont surface started aft er retreating Lake Pannon approx. 7 Myr ago (Magyar, I. et al 1999) and continued in Early Pliocene under arid steppe climate (Schweitzer, F. 1997;Sebe, K. et al 2008). On Mecsekalja a dislocation zone (neotectonic fault system) developed that results a subsidence from Okorág towards Pécs, Ellend and Bóly, where basins were evolved as tectonic subsidence moved eastward.…”

Section: Study Areamentioning

confidence: 99%

An evaluation of EU-DEM in comparison with ASTER GDEM, SRTM and contour-based DEMs over the Eastern Mecsek Mountains

2014

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The availability of global coverage digital surface models (DSMs, like ASTER GDEM or SRTM) and the variation of fused models based on these (like EU-DEM) still has a great impact on scientifi c researches, as they provide a fairly good base dataset with a low production time and expenses. However, validation reports of the initial DSMs convinced different characteristics and errors, thus it is essential to examine these height datasets prior to application. A verifying process for EU-DEM is more important, because it has been published without a formal validation. Although the base of the EU-DEM was a corrected ASTER GDEM dataset, the visual assessment and the error statistics suggest more similarity to the SRTM DSM. This study goes further than just identifying the errors, it att empts to correct the height diff erences. For this reason altering the false values of the land cover and fi ltering the occurring noise was implemented. The geomorphometric analyses carried out as part of the verifi cation methods propose each improved model as potential base for geomorphological studies, if they meet the certain eff ective resolution requirements.

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Section: Study Areamentioning

confidence: 99%

An evaluation of EU-DEM in comparison with ASTER GDEM, SRTM and contour-based DEMs over the Eastern Mecsek Mountains

2014

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“…Instead it belonged to the Paratethys, an inland water body that connected a series of epicontinental basins from the Alps to the Central Asian Aral Lake. By the beginning of the late Miocene, a combination of tectonic activity and eustatic sea-level fall had effectively isolated the Pannonian Basin fauna from that of other paratethyan basins and from the marine system (Kazmer 1990;Rö gl 1998;Magyar et al 1999a;Harzhauser et al 2004;Popov et al 2004Popov et al , 2006). Following this isolation, a nearly complete turnover in the faunal assemblages indicates that the environment shifted from marginal marine to lacustrine brackish (Papp et al 1974(Papp et al , 1985Nagymarosy and Mü ller 1988;Mü ller et al 1999;.…”

Section: Introductionmentioning

confidence: 99%

The paradox of gradualism: phyletic evolution in two lineages of lymnocardiid bivalves (Lake Pannon, central Europe)

Geary¹,

Hunt²,

Magyar³

et al. 2010

Paleobiology

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Abstract.-Patterns preserved in the fossil record are of the highest importance in addressing questions about long-term evolutionary processes, yet both the description of pattern and its translation into process can be difficult. With respect to gradual phyletic change, we know that randomly generated sequences may exhibit characteristics of a ''trend''; apparent patterns, therefore, must be interpreted with caution. Furthermore, even when the claim of a gradual trend can be statistically justified, interpretation of the underlying mechanisms may be challenging. Given that we can observe populations changing rapidly over tens or hundreds of years, it is now more difficult to explain instances of geologically gradual (as opposed to punctuated) change.Here we describe morphologic change in two bivalve lineages from the late Miocene Lake Pannon. We evaluate change according to the model-based methods of Hunt. Both lineages exhibit size increases and shape changes over an interval of nearly 4 million years. Size and two shape variables in the conjungens lineage are best fit by a model of directional evolution; remaining shape variables mostly conform to unbiased random walks. Body-size evolution in the diprosopum lineage is also significantly directional but all shape variables are best fit by the unbiased random walk model; the small number of sampling intervals available for this lineage (n 5 6) makes determination of the actual pattern more difficult. Model-fitting results indicate that the parallel trajectories of increasing log shell height over time in the two lineages can be accounted for by an underlying trend shared by both lineages, suggesting that the size increases may be a shared response to the same cause. The pace of phenotypic change, measured as Lynch's D, is slower than the neutral expectation for all size and shape traits.Our examples illustrate well the paradox of gradualism; the sequences exhibit significant directional morphological evolution, but rates of change as measured over the long-term are apparently too slow for directional selection or even drift to be the cause. Viewing long-term phenotypic evolution in terms of populations tracking peaks on adaptive landscapes is useful in this context. Such a view allows for intervals of directional selection (during times of peak movement-resulting in the overall trends we can detect) interspersed with intervals of stasis (during times of peak stability-resulting in overall changes that appear to proceed more slowly than the neutral expectation). The paradox of gradualism thus reduces to (1) peak movements and their drivers, which are not restricted in rate as are population-genetic drivers, and (2) the maintenance of stasis, on which no consensus exists.We can identify no environmental parameter in the central European Neogene that exhibits consistent change across the interval of gradual morphologic change. It may be that in Lake Pannon the long-term persistence of generally ameliorating conditions (plentiful resources and habitat space, few pr...

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“…For those sediment thicknesses below seismic resolution (reflector tuning thickness of approximately one quarter wavelength which for the lines is approximately a lower limit of 10m), borehole-derived data is utilized. This point of resolution and interpretation is rather crucial both for [19]. Observe the time transgressive nature of the poorly age-defined lithologic-based formations.…”

Section: Methodsmentioning

confidence: 99%

“…The Middle/Upper Miocene ? boundary is marked by a major regression which isolated the Central Paratethys from the sea, transforming it into a large, long-lived, brackish water body of Lake Pannon [19]. The cause of this regression is still highly debated.…”

Section: Geologic-tectonic Setting Of the Pannonian Basin Serbian Emmentioning

confidence: 99%

Seismic stratigraphy based chronostratigraphy (SSBC) of the Serbian Banat region of the Pannonian Basin

Pigott

Radivojević

2010

Open Geosciences

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Seismic stratigraphy based chronostratigraphic (SSBC) analysis of the Serbian Banat region allows the delineation of the spatial and stratigraphic relationships of the generally regressive and shallowing upward Neogene depositional fill of a tectonically unstable central portion of the Pannonian Basin. When geometrically restored in time and space, the sediment dispersal directions, sediment source directions, types of sedimentation breaks and the tectonic events influencing basin evolution can be delineated. For such an analysis the timetransgressive lithostratigraphic units used in the neighbouring Hungarian part of the Pannonian Basin are conveniently introduced based upon their characteristic seismic facies and constrained borehole log records as mappable seismic stratigraphic sequence units, termed "seismic operational sequences". The respective Neogene stage and operational sequence equivalents (Hungarian lithostratigraphic units or formations) are the Middle Miocene (Badenian, Sarmatian), Upper Miocene-Lower Pliocene (Pannonian-Endrod and Szolnok Formations; Pontian-Algyo and Ujfalu Formations and Lower Pliocene-Zagyva Formation) and Upper PlioceneQuaternary (Nagyalfold Formation). SSBC analysis greatly assists in the geological constraint or "geovalidation" of interpreted seismic stratigraphic relationships and provides potentially critical insight into stratigraphic and structural problems of non-unique interpretations. In the specific case, using such an approach on previously unpublished regional seismic lines, SSBC analysis reveals that the Banat region has undergone structural inversion. This may be related to changes in local stress directions along strike slip faults, which initiated in earliest Late Miocene (Endrod Formation), culminating in the reverse tilting and incipient shortening of the western graben. Therefore during the time interval that the Badenian through Endrod sediments were deposited in the graben, autocyclic progradation initiated from the Kikinda Szeged High in the East followed by Szolnok, Algyo, Ujfalu and younger units prograding from the West as the central high uplifted relative to the graben. Such tectonic inversion has substantial hydrocarbon potential implications for exploration in the region.

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Paleogeographic evolution of the Late Miocene Lake Pannon in Central Europe

Cited by 328 publications

References 11 publications

An evaluation of EU-DEM in comparison with ASTER GDEM, SRTM and contour-based DEMs over the Eastern Mecsek Mountains

An evaluation of EU-DEM in comparison with ASTER GDEM, SRTM and contour-based DEMs over the Eastern Mecsek Mountains

The paradox of gradualism: phyletic evolution in two lineages of lymnocardiid bivalves (Lake Pannon, central Europe)

Seismic stratigraphy based chronostratigraphy (SSBC) of the Serbian Banat region of the Pannonian Basin

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