TY - JOUR AU - Geary, DH AU - Hoffmann, E AU - Magyar, Imre AU - Freiheit, J AU - Padilla, D TI - Body size, longevity, and growth rate in Lake Pannon melanopsid gastropods and their predecessors JF - PALEOBIOLOGY J2 - PALEOBIOLOGY VL - 38 PY - 2012 IS - 4 SP - 554 EP - 568 PG - 15 SN - 0094-8373 DO - 10.1666/11014.1 UR - https://m2.mtmt.hu/api/publication/2154672 ID - 2154672 N1 - Department of Geoscience, University of Wisconsin, Madison, WI 53706, United States Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY 11794-5245, United States Westlake Park Blvd, Houston, TX 77079, United States Research Group for Paleontology, Hungarian Academy of Sciences Hungarian Natural History Museum, Etvs University, POB 137, Budapest, H-1431, Hungary Cited By :8 Export Date: 15 February 2022 Correspondence Address: Geary, D.H.; Department of Geoscience, , Madison, WI 53706, United States; email: dana@geology.wisc.edu AB - We investigate potential microevolutionary mechanisms of phenotypic change in a lineage of brackish-water gastropods from Lake Pannon. The lineage exhibits a threefold increase in body size and a pronounced increase in shell shouldering over a roughly 2.5-Myr interval. We use the stable oxygen isotope profiles of 13 shells to address the question of whether large size is due to more rapid growth or to greater longevity. Results indicate that larger individuals have significantly greater longevity. Growth rates in large snails are comparable to those of their smaller-bodied ancestors. Potentially relevant selective advantages of large size include escape from predators, avoidance of resource competition, and increased fecundity. We argue that the first two advantages may have accrued to larger individuals but are not likely to have driven the trend because selection for them would favor more rapid growth rates. Fecundity selection, on the other hand, is readily envisioned in a stable, predictable environment in which the need for early reproduction is relaxed. The evolution of large body size in Lake Pannon molluscs may be comparable to evolution on many islands, where reduced pressure from competition and predation lead to characteristic changes in body size. © 2012 The Paleontological Society. All rights reserved. LA - English DB - MTMT ER - TY - CHAP AU - Magyar, Imre AU - Geary, DH ED - Baganz, OW ED - Bartov, Y ED - Bohacs, K ED - Nummedal, D TI - Biostratigraphy in a late Neogene Caspian-Type Lacustrine Basin: Lake Pannon, Hungary T2 - Lacustrine sandstone reservoirs and hydrocarbon systems PB - American Association of Petroleum Geologists (AAPG) CY - Tulsa (OK) SN - 9780891813774 T3 - AAPG Memoir, ISSN 0271-8529 ; 95. PY - 2012 SP - 255 EP - 264 PG - 10 DO - 10.1306/13291392M953142 UR - https://m2.mtmt.hu/api/publication/2145538 ID - 2145538 N1 - Cited By :33 Export Date: 15 February 2022 LA - English DB - MTMT ER - TY - JOUR AU - Csillag, Gábor AU - Sztanó, Orsolya AU - Magyar, Imre AU - Hámori, Z TI - A Kállai Kavics települési helyzete a Tapolcai-medencében geoelektromos szelvények és fúrási adatok tükrében [Stratigraphy of the kálla gravel in tapolca basin based on multi-electrode probing and well data] JF - FÖLDTANI KÖZLÖNY J2 - FÖLDTANI KÖZLÖNY VL - 140 PY - 2010 IS - 2 SP - 183 EP - 196 PG - 14 SN - 0015-542X UR - https://m2.mtmt.hu/api/publication/1422348 ID - 1422348 N1 - Cited By :23 Export Date: 20 January 2023 Correspondence Address: Gábor, C.; MÁFI, Stefánia út 14, 1143 Budapest, Hungary; email: csillag@mafi.hu LA - Hungarian DB - MTMT ER - TY - JOUR AU - Cziczer, István AU - Magyar, Imre AU - Pipik, R AU - Bohme, M AU - Coric, S AU - Bakrac, K AU - Suto-Szentai, M AU - Lantos, M AU - Babinszki, Edit AU - Muller, P TI - Life in the sublittoral zone of long-lived Lake Pannon: paleontological analysis of the Upper Miocene Szak Formation, Hungary. Paleontological analysis of the Upper Miocene Szák Formation, Hungary TS - Paleontological analysis of the Upper Miocene Szák Formation, Hungary JF - INTERNATIONAL JOURNAL OF EARTH SCIENCES J2 - INT J EARTH SCI VL - 98 PY - 2009 IS - 7 SP - 1741 EP - 1766 PG - 26 SN - 1437-3254 DO - 10.1007/s00531-008-0322-3 UR - https://m2.mtmt.hu/api/publication/1333817 ID - 1333817 N1 - Department of Geology and Paleontology, University of Szeged, Egyetem u. 2-6, 6722 Szeged, Hungary MOL Hungarian Oil and Gas Plc, Október 23. u. 18, 1117 Budapest, Hungary Slovak Academy of Sciences, Geological Institute, Severná 5, 974 01 Banská Bystrica, Slovakia Department on Earth- and Environmental Science, Section Palaeontology, Ludwig-Maximilians University, Munich Richard-Wagner-Str. 10, 80333 Munich, Germany Geological Survey of Austria, Neulinggasse 38, 1030 Vienna, Austria Croatian Geological Survey, Sachsova 2, 10000 Zagreb, Croatia Május 1. u. 7, 7300 Komlo', Hungary Geological Institute of Hungary, Stefánia út 14, 1143 Budapest, Hungary Cited By :55 Export Date: 31 August 2023 CODEN: IJESF Correspondence Address: Cziczer, L.; Department of Geology and Paleontology, Egyetem u. 2-6, 6722 Szeged, Hungary; email: cziczer@yahoo.com AB - Life and depositional environments in the sublittoral zone of Lake Pannon, a large, brackish Paratethyan lake from the Late Miocene, were reconstructed from fossils and facies of the Szak Formation. This formation is exposed in several, roughly coeval (9.4-8.9 Ma) outcrops, located along strike of the paleo-shelf-break in northwestern Hungary. The silty argillaceous marl of the formation was deposited below storm wave base, at 20-30 to 80-90 m water depth. The abundance of benthic organisms indicates that the bottom water was usually well oxygenated. Interstitial dysoxia, however, may have occurred immediately below the sediment-water interface, as evidenced by occasional preservation of trace fossils such as Diplocraterion. The fauna comprised endemic mollusks, including brackish cockles of the subfamily Lymnocardiinae, dreissenid mussels (Congeria), and highly adapted, uniquely large-sized deep-water pulmonate snails (planorbids and lymnaeids). Ostracods were dominated by endemic species and, in some cases, endemic genera of candonids, leptocytherids, cypridids, and loxoconchids. Fish remnants include a sciaenid otolith and the oldest skeletal occurrence of Perca in Europe. The phytoplankton comprised exclusively endemic coccolithophorids, mostly endemic dinoflagellates (prevailingly Spiniferites), and cosmopolitan green algae. The Late Miocene fauna and flora of Lake Pannon were in many ways similar to the modern Caspian biota, and in particular cases can be regarded as its precursor. LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Imre AU - Lantos, M AU - Ujszaszi, K AU - Kordos, László TI - Magnetostratigraphic, seismic and biostratigraphic correlations of the Upper Miocene sediments in the northwestern Pannonian Basin System JF - GEOLOGICA CARPATHICA J2 - GEOL CARPATH VL - 58 PY - 2007 IS - 3 SP - 277 EP - 290 PG - 14 SN - 1335-0552 UR - https://m2.mtmt.hu/api/publication/1890257 ID - 1890257 N1 - MOL Hungarian Oil and Gas Plc., Budafoki út 79, 1117 Budapest, Hungary Geological Institute of Hungary, Stefánia út 14, 1143 Budapest, Hungary Cited By :65 Export Date: 20 January 2023 Correspondence Address: Magyar, I.; MOL Hungarian Oil and Gas Plc., Budafoki út 79, 1117 Budapest, Hungary; email: immagyar@mol.hu AB - Magnetic polarity records from four wells and four surface outcrops from the non-marine Upper Miocene ofthe northwester, Pannonian Basin System have been correlated with the polarity time scale. Correlation between the wells (Duka-II, Nagylozs-1, Szombathely-II, and Zsira-1) was established by means of seven seismic horizons (A to G), calibrated biostratigraphically in the boreholes. Interpretation of the seismic horizons was extended to about 8000 km(2) in northwestern Hungary. Correlation of the surface outcrops was based on biostratigraphy (Hennersdorf, Pezinok, Sopron) or it was attempted by seismic stratigraphy (Berbaltavar). Although the Hennersdorf, Sopron, and Pezinok outcrops all belong to C5n (11.04 to 9.78 Ma), the first is biostratigraphically older than the latter ones. This correlation implies that the MN10 rodents of the Pezinok outcrop are older than 9.7 Ma, the presently acknowledged MN9/MN10 boundary. The borehole sections in the western part of the Kisalfold (Danube) Basin (Nagylozs, Zsira, and Szombathely) were correlated with Chrons C5r to C3B (> 11 Ma to > 7 Ma), whereas the Duka section in the southeastern part corresponded to the interval C4Ar to C4r (> 9 Ma to > 8 Ma). The Berbaltavar mammal locality probably correlates with C4n (8.11 to 7.53 Ma). All these data combined with facies interpretation and seismic correlations suggest that the shelf break of Lake Pannon swept across the Kisalfold Basin from NW to S-SE in less than 1 million year (ca. 9.7 to 8.8 Ma). LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Imre AU - Muller, PM AU - Sztanó, Orsolya AU - Babinszki, Edit AU - Lantos, M TI - Oxygen-related facies in Lake Pannon deposits (Upper Miocene) at Budapest-Kobanya JF - FACIES J2 - FACIES VL - 52 PY - 2006 IS - 2 SP - 209 EP - 220 PG - 12 SN - 0172-9179 DO - 10.1007/s10347-005-0036-y UR - https://m2.mtmt.hu/api/publication/1333820 ID - 1333820 N1 - MOL Hungarian Oil and Gas Company, Batthyány u. 45, H-1039 Budapest, Hungary Geological Institute of Hungary, Stefánia út 14, H-1143 Budapest, Hungary Department of Geology, Eötvös University, Pazmany P. setany 1/C, 1117 Budapest, Hungary Cited By :22 Export Date: 15 February 2022 Correspondence Address: Magyar, I.; MOL Hungarian Oil and Gas Company, Batthyány u. 45, H-1039 Budapest, Hungary; email: immagyar@mol.hu AB - Oxygen availability is considered to have been a major factor in shaping the sedimentary facies and biofacies of a Late Miocene (8-8.5 Ma old) Lake Pannon sequence studied in the Kozma-street outcrop in Budapest-Kobanya. The sequence contains blue clays deposited in low-oxygen conditions between the storm and the fair-weather wave bases and thin intercalations of laminated fine sand interpreted as tempestites. The storms caused temporary oxygenation of the bottom and thus promoted bioturbation, as indicated by the presence of trace fossils belonging to the Arenicolites ichnofacies or a lacustrine equivalent of the marine Skolithos ichnofacies. Fully bioturbated sand layers with the infaunal Dreissenomya and other littoral molluscs indicate longer periods of bottom ventilation. The blue clays immediately above these sand layers also contain abundant and diverse mollusc fauna. Oxygen deficiency on the "shelf" of Lake Pannon was a local phenomenon probably caused by a high organic loading and/or a salinity-induced stratification. LA - English DB - MTMT ER - TY - JOUR AU - Geary, DH AU - Magyar, Imre AU - Müller, P TI - Ancient Lake Pannon and its endemic molluscan fauna (Central Europe; Mio-Pliocene) JF - ADVANCES IN ECOLOGICAL RESEARCH J2 - ADV ECOL RES VL - 31 PY - 2000 SP - 463 EP - 482 PG - 20 SN - 0065-2504 DO - 10.1016/S0065-2504(00)31025-X UR - https://m2.mtmt.hu/api/publication/2154679 ID - 2154679 AB - Lake Pannon existed from approximately 12 to 4 Mya, situated in the Pannonian basin of central-eastern Europe. The birth of Lake Pannon is defined by its loss of contact with adjacent marine areas. After these contacts were closed 12 Mya, they were never re-established. The physical history of Lake Pannon, including its palaeogeography, palaeobathymetry, sedimentology and chronostratigraphy, is currently well understood and provides an excellent context in which to investigate a variety of palaeobiological questions. Lake Pannon harboured a spectacular endemic malacofauna, including over 900 described species and many endemic genera. Among bivalves, the families Cardiidae (> 220 species) and Dreissenidae (> 130 species) predominate. These groups evolved from survivors of the "Sarmatian Sea", the brackish-marine water body that occupied the Pannonian basin prior to the formation of the lake (see Dumont, this volume). Among gastropods, the prosobranch families Hydrobiidae (> 180 species) and Melanopsidae (> 100 species) predominate. Several pulmonate gastropods evolved remarkable endemics adapted to deep basinal habitats. The fact that Lake Pannon's malacofauna had its ancestry in both the relict marine and surrounding freshwater systems contributed to its overall high diversity. In addition, the long lifetime of the lake (approximately 8 My) probably played a role in the establishment of such high endemism. Although a great many of the hundreds of endemic species apparently evolved geologically rapidly (i.e. < 10 5 years), evolution in several lineages appears to have been anagenetic and geologically gradual, with morphological intermediates spanning 1-2 My or more. © 2000. LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Imre AU - Müller, P AU - Geary, D H AU - Sanders, H C AU - Tari, G C TI - Diachronous deposits of Lake Pannon in the Kisalföld basin reflect basin and mollusc evolution JF - ABHANDLUNGEN DER GEOLOGISCHEN BUNDESANSTALT J2 - ABH GEOL BUNDESANST VL - 56 PY - 2000 SP - 669 EP - 678 PG - 10 SN - 0378-0864 UR - https://m2.mtmt.hu/api/publication/1891359 ID - 1891359 LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Imre AU - Geary, D H AU - Süto-Szentai, M AU - Lantos, M AU - Müller, P TI - Integrated biostratigraphic, magnetostratigraphic and chronostratigraphic correlations of the Late Miocene Lake Pannon deposits JF - ACTA GEOLOGICA HUNGARICA: A QUARTERLY OF THE HUNGARIAN ACADEMY OF SCIENCES J2 - ACTA GEOL HUNG VL - 42 PY - 1999 IS - 1 SP - 5 EP - 31 PG - 27 SN - 0236-5278 UR - https://m2.mtmt.hu/api/publication/1890285 ID - 1890285 N1 - Department of Geology and Geophysics, University of Wisconsin, Madison, WI, United States Geological Institute of Hungary, Budapest, Hungary Natural Historical Collection, Komló, Hungary 1215 W. Dayton Street, Madison, WI 53706, United States Városház tér 1, H-7300 Komló, Hungary Stefánia út 14, H-1143 Budapest, Hungary Cited By :94 Export Date: 24 February 2023 Correspondence Address: Magyar, I.; Department of Geology and Geophysics, 1215 W. Dayton Street, Madison, WI 53706, United States AB - Due to the highly endemic nature of the Late Miocene Lake Pannon's aquatic biota, the stratigraphic correlation of the lake's sediments with the global chronostratigraphic system is dependent upon mammal biostratigraphy, magnetostratigraphy, and radio-isotopic age determinations. However, correlation of mammal localities and isotopically dated volcanic formations with the lacustrine sequence is possible only in a few instances, offering limited independent data for magnetostratigraphic interpretation. In this paper we construct a correlation chart that integrates biostratigraphy (dinoflagellates and mollusks) with the results of physical dating methods. The average time resolution of our biozones (excluding deep-water mollusk zones) is 1 Ma. There is a difference, however, in the amount of available data and consequently in the reliability of our correlations between the lower (older than approximately 9.5 Ma) and upper parts of the sedimentary sequence; the former is well-established, whereas a scarcity of radio-isotopic ages from the upper part of the sequence results in more uncertainty. In addition, a biostratigraphic subdivision of the last ca. 3 Ma interval of the lacustrine sequence is almost entirely lacking. The only opportunity for interbasinal biostratigraphic correlation within the lifetime of Lake Pannon is the Early Pontian migration event, when a great number of the Lake Pannon endemic species entered the Eastern Paratethys. However, due to the scarcity of chronological data from the Late Miocene of the respective basins, correlation of the Eastern Paratethyan Pontian Stage to the Lake Pannon deposits carriers at least a 1.3 Ma uncertainty. LA - English DB - MTMT ER - TY - JOUR AU - Muller, P AU - Geary, DH AU - Magyar, Imre TI - The endemic molluscs of the Late Miocene Lake Pannon: their origin, evolution, and family-level taxonomy JF - LETHAIA J2 - LETHAIA VL - 32 PY - 1999 IS - 1 SP - 47 EP - 60 PG - 14 SN - 0024-1164 DO - 10.1111/j.1502-3931.1999.tb00580.x UR - https://m2.mtmt.hu/api/publication/1890262 ID - 1890262 N1 - Geological Institute of Hungary, Stefánia út 14, H-1143 Budapest, Hungary Department of Geology and Geophysics, University of Wisconsin - Madison, 1215 Dayton Street, Madison, WI 53706, United States Cited By :93 Export Date: 24 February 2023 Correspondence Address: Muller, P.; Geological Institute of Hungary, Stefania ut 14, H-1143 Budapest, Hungary AB - Long-lived lakes are often sites of spectacular endemic radiations. During the Oligocene to recent history of the Paratethys, large, long-lived (more than a million years) lakes with endemic faunas formed three times, in three different basins: the first in the Pannonian basin, the second in the Euxinian (Black Sea) basin, and the third in the Caspian basin. Because the Euxinian lake inherited much of the fauna of Lake Pannon, the three lakes together hosted two endemic radiations of molluscs. The most long-lived lake in the region was Lake Pannon, which persisted approximately seven million years from the late Middle Miocene to the Early Pliocene. Lake Pannon was formed by isolation from the sea. Changes in hydrological regime and/or water chemistry in addition to the relative lowstand which accompanied (or caused) the isolation almost completely exterminated the restricted marine fauna of the basin. A few highly euryhaline and marginal marine cardiids, dreissenids, and hydrobiids survived this environmental change. As in other fossil and extant long-lived lakes, the originally low-diversity fauna radiated into a high number of related endemic species ('species necks') and genera in the expanding and ecologically vacated lake, Many originally freshwater taxa (unionids, sphaeriids, viviparids, valvatids, melanopsids, lymnaeids, planorbids) entered the lake as well, and some of them also gave rise to endemic clades. Evolution in both relict and freshwater immigrant groups led to the appearance of highly unusual shell shapes. Many lineages exhibit gradual morphological changes over one to several million years. More than 900 endemic mollusc species have been described from Lake Pannon, although this number includes junior synonyms, invalid species names, and highly similar chronospecies. Applying a conservative taxonomy, all these species belong to four bivalve and eight gastropod families. The high degree of endemism, however, is reflected by proposals of some authors to establish as many as five new families based on Lake Pannon endemics. LA - English DB - MTMT ER - TY - JOUR AU - Szilaj, R AU - Szónoky, M AU - Geary, D H AU - Magyar, Imre AU - Müller, P TI - Stratigraphy, paleoecology, and paleogeography of the 'Congeria ungulacaprae beds' (Lymnocardium ponticum Zone) in NW Hungary: Study of the Daka outcrop JF - ACTA GEOLOGICA HUNGARICA: A QUARTERLY OF THE HUNGARIAN ACADEMY OF SCIENCES J2 - ACTA GEOL HUNG VL - 42 PY - 1999 IS - 1 SP - 33 EP - 55 PG - 23 SN - 0236-5278 UR - https://m2.mtmt.hu/api/publication/1890288 ID - 1890288 AB - The littoral 'Congeria ungulacaprae beds' (=Lymnocardium ponticum Zone) of the Late Miocene Lake Pannon are widely exposed around the Transdanubian Central Range of NW Hungary, especially on its NW side. Study of the mollusk fauna of the Daka outcrop, located near the classic locality of Kup, showed that the fauna of this zone represents a transitional stage between the older L. conjungens Zone and the younger L. decorum Zone. The characteristic mollusk association of the L. ponticum Zone is apparently missing from the stratigraphic record of the southern part of the Pannonian basin. This difference can be partly explained by the paleogeographical situation. The northwestern part of the basin, where the Daka fauna lived, was site of rapid delta progradation, whereas the southern shoreline lacked significant sediment input. However, the littoral, well-aerated, vegetation-rich environment represented by the Daka layers must have had its counterpart in the southern part of the basin, where its sediments were either eroded or lie covered by younger sediments in a more basinward position. The age of the Daka fauna and of the whole L. ponticum Zone is estimated between 9 and 10 Ma, on the basis of its correlation to magnetic polarity chron 4Ar in boreholes Berhida-3, Nagylozs-1, and Duka-II. LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Imre TI - Mollusc fauna and flora of the Pannonian quartz sandstone at Mindszentkalla, Hungary JF - ANNALES UNIVERSITATIS SCIENTIARUM BUDAPESTINENSIS DE ROLANDO EÖTVÖS NOMINATAE - SECTIO GEOLOGICA J2 - ANN UNIV SCI BP R EÖTVÖS NOM SECT GEOL VL - 28 PY - 1988 SP - 209 EP - 222 PG - 14 SN - 0365-0634 UR - https://m2.mtmt.hu/api/publication/1890292 ID - 1890292 AB - The mollusc fauna and flora collected from the Pannonian Kalla Sandstone at Mindszentkalla are preserved as internal and external moulds. The frequent Congeria sp., Lymnocardium cf. soproniense and Unio atavus indicate the E zone of the Vienna basin. The flora (determined by L. Hably and Zs. Debreczy) includes Mediterranean species, which occur also in the Sarmatian flora of the Tokaj Mts. -Author LA - English DB - MTMT ER -