TY - JOUR AU - Erőss, Anita AU - Hegedűs-Csondor, Katalin AU - Czuppon, György AU - Dezső, József AU - Müller, Imre TI - Groundwater flow system understanding of the lukewarm springs in Kistapolca (South Hungary) and its relevance to hypogene cave formation JF - ENVIRONMENTAL EARTH SCIENCES J2 - ENVIRON EARTH SCI VL - 79 PY - 2020 IS - 6 PG - 15 SN - 1866-6280 DO - 10.1007/s12665-020-8870-3 UR - https://m2.mtmt.hu/api/publication/31185657 ID - 31185657 N1 - József and Erzsébet Tóth Endowed Hydrogeology Chair, Department of Geology, Institute of Geography and Earth Sciences, Faculty of Science, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary Institute for Geological and Geochemical Research, Budaörsi Str. 45, Budapest, 1112, Hungary Institute of Geography and Earth Sciences, University of Pécs, Ifjúság Str. 6, Pécs, 7624, Hungary Department of Hydrogeology and Engineering Geology, Institute of Environmental Management, University of Miskolc-Campus, Miskolc, 3515, Hungary Cited By :4 Export Date: 25 January 2022 Correspondence Address: Erőss, A.; József and Erzsébet Tóth Endowed Hydrogeology Chair, Pázmány Péter sétány 1/c, Hungary; email: anita.eross@geology.elte.hu LA - English DB - MTMT ER - TY - JOUR AU - Varga, György TI - Changing nature of Saharan dust deposition in the Carpathian Basin (Central Europe): 40 years of identified North African dust events (1979–2018) JF - ENVIRONMENT INTERNATIONAL J2 - ENVIRON INT VL - 139 PY - 2020 SN - 0160-4120 DO - 10.1016/j.envint.2020.105712 UR - https://m2.mtmt.hu/api/publication/31277804 ID - 31277804 N1 - Cited By :4 Export Date: 25 October 2020 CODEN: ENVID Cited By :4 Export Date: 26 October 2020 CODEN: ENVID LA - English DB - MTMT ER - TY - JOUR AU - Varga, György AU - Újvári, Gábor AU - Kovács, János TI - Interpretation of sedimentary (sub)populations extracted from grain size distributions of Central European loess-paleosol series JF - QUATERNARY INTERNATIONAL J2 - QUATERN INT VL - 502 PY - 2019 IS - Part A SP - 60 EP - 70 PG - 11 SN - 1040-6182 DO - 10.1016/j.quaint.2017.09.021 UR - https://m2.mtmt.hu/api/publication/3280132 ID - 3280132 AB - Grain size proxies of aeolian dust deposits have widely been applied in environmental and sedimentary studies. However, large body of research papers are not taking into consideration that a complex grain size distribution curve cannot be an indicator of a single one environmental factor (e.g. wind speed/strength, transportation distance, aridity). The aim of the present paper is to discuss the main differences of frequently used statistical methods and to provide possible interpretations of the results by applying these various approaches on the high-resolution loess-paleosol profile of Dunaszekcso, South Hungary (Central Europe). Beside single statistical descriptors (mean, median, mode) of grain size and simple indices of size-fraction ratios (U-ratio, Grain Size Index), some more complex algorithms were also used in our paper. The applied parametric curve-fitting, end-member modelling and hierarchical cluster analysis techniques are using the whole spectrum of the measured grain size distributions and provide a more reliable and more representative results even in case of small scale variations. According to our findings, approaches which provide direct linkage among simple statistical descriptors and single atmospheric or other environmental elements are rather oversimplified as properties aeolian dust deposits are influenced by the integrated effects of several concurrent processes. Differences of more complex decomposition methods arise from the different approach and scope. End-members are determined from the unmixing based on the covariance structure of the whole grain size data-series of the section, while the parametric curve-fitting is based on the one-by-one deconvolution of the grain size distribution curves. End-members of loess-paleosol samples are regarded as representation of the average dust grain size distribution of various temporal sediment clusters of seasonal or other short-term intervals, while (sub) populations by parametric curve-fitting are proposed to illustrate process-related elements of background and dust storm depositional components for each sample. Results of cluster analysis represent similar grouping conditions as end-member modelling with a reduced sedimentary and genetically meaning. (C) 2017 Elsevier Ltd and INQUA. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Varga, György AU - Kovács, János AU - Szalai, Zoltán AU - Cserháti, Csaba AU - Újvári, Gábor TI - Granulometric characterization of paleosols in loess series by automated static image analysis JF - SEDIMENTARY GEOLOGY J2 - SEDIMENT GEOL VL - 370 PY - 2018 SP - 1 EP - 14 PG - 11 SN - 0037-0738 DO - 10.1016/j.sedgeo.2018.04.001 UR - https://m2.mtmt.hu/api/publication/3357510 ID - 3357510 N1 - Geographical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, H-1112, Budapest, Hungary Department of Geology & Meteorology, University of Pécs, Ifjúság u. 6, Pécs, H-7624, Hungary Environmental Analytical & Geoanalytical Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság u. 20, Pécs, H-7624, Hungary Department of Environmental and Landscape Geography (Institute of Geography and Earth Sciences, Faculty of Science), Eötvös University, Pázmány Péter sétány 1/c, Budapest, H-1117, Hungary Department of Solid State Physics, University of Debrecen, Bem tér 18/b, Debrecen, H-4026, Hungary Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi u. 45., Budapest, H-1112, Hungary Cited By :11 Export Date: 25 October 2020 Correspondence Address: Varga, G.; Geographical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, H-1112, Hungary; email: varga.gyorgy@csfk.mta.hu LA - English DB - MTMT ER - TY - CHAP AU - Leél-Őssy, Szabolcs ED - Klimchouk, A ED - N, Palmer A ED - De Waele, J ED - S, Auler A ED - Audra, P TI - Caves of the Buda Thermal Karst T2 - Hypogene Karst Regions and Caves of the World. Cave and Karst Systems of the World PB - Springer Netherlands CY - Cham (Németország) SN - 9783319533476 PB - Springer Netherlands PY - 2017 SP - 279 EP - 297 PG - 19 DO - 10.1007/978-3-319-53348-3_18 UR - https://m2.mtmt.hu/api/publication/26793039 ID - 26793039 AB - The Buda thermal karst is one of the most characteristic hypogene karst systems of the world developed in Triassic and Eocene limestone and marl in Budapest, on the right side of the Danube, under 300-400 m high hills. Due to the mixing corrosion enhanced by CO2 and perhaps sulfuric acid, the water circulation formed multi-storey cave systems with different morphologies and complicated layout along the tectonic fissures. The arrangement of caves is independent of surface topography. The world-famous medicinal waters of Budapest come to the surface through cave passages. Due to the incision of the Danube and the uplift of the area in the Pleistocene, most passages are presently dry; now they lie 100 m above the Danube, though there are still passages below the water-table. The length of the five largest known caves and about 100 smaller ones reaches 55 km, and it is reasonable to estimate the length of unknown underground passages to be comparable. Caves are characterized by complex morphology, suggesting the formation by rising flow, and by rich carbonate-sulfuric mineral precipitations. Some of them (e.g. barite and calcite veins) are associated with bedrock formation and thus predate the cave forming process. There are minerals that precipitated from the warm water that dissolved the cave (Fe-and Mn-containing minerals formed by bacterial colonies, or cave rafts and folia). Evaporitic precipitations (e.g. popcorns, and frostworks) are remarkable. There are frequent precipitations of gypsum (chandeliers, gypsum flowers, etc.) due to the pyrite content of the marl above the passages. Discovering the concealed and hidden caves since the early twentieth-century was helped by quarries and earthworks followed by systematic and deliberate exploration. LA - English DB - MTMT ER - TY - CHAP AU - Mádlné Szőnyi, Judit AU - Erőss, Anita AU - Tóth, Ádám ED - Klimchouk, A ED - Palmer, A ED - De Waele, J ED - Auler, A ED - Audra, P TI - Fluid Flow Systems and Hypogene Karst of the Transdanubian Range, Hungary—With Special Emphasis on Buda Thermal Karst T2 - Hypogene Karst Regions and Caves of the World PB - Springer Netherlands CY - Graz SN - 9783319533483 PY - 2017 SP - 267 EP - 278 PG - 12 DO - 10.1007/978-3-319-53348-3_17 UR - https://m2.mtmt.hu/api/publication/3256328 ID - 3256328 LA - English DB - MTMT ER - TY - JOUR AU - Pazonyi, Piroska AU - Mészáros, Lukács AU - Hír, János AU - Szentesi, Zoltán TI - The lowermost Pleistocene rodent and soricid (Mammalia) fauna from Beremend 14 locality (South Hungary) and its biostratigraphical and palaeoecological implications JF - FRAGMENTA PALAEONTOLOGICA HUNGARICA J2 - FRAGM PALAEONTOL HUNG VL - 33 PY - 2016 SP - 99 EP - 134 PG - 36 SN - 1586-930X DO - 10.17111/FragmPalHung.2016.33.99 UR - https://m2.mtmt.hu/api/publication/3045091 ID - 3045091 N1 - WoS:hiba:3045091 2022-12-12 05:06 év nem egyezik, cím nem egyezik, DOI azonosító nem egyezik LA - English DB - MTMT ER - TY - JOUR AU - Újvári, Gábor AU - Kok, J F AU - Varga, György AU - Kovács, János TI - The physics of wind-blown loess: Implications for grain size proxy interpretations in Quaternary paleoclimate studies JF - EARTH-SCIENCE REVIEWS J2 - EARTH-SCI REV VL - 154 PY - 2016 SP - 247 EP - 278 PG - 32 SN - 0012-8252 DO - 10.1016/j.earscirev.2016.01.006 UR - https://m2.mtmt.hu/api/publication/3011427 ID - 3011427 N1 - Funding Agency and Grant Number: Hungarian Scientific Research FundOrszagos Tudomanyos Kutatasi Alapprogramok (OTKA) [OTKA PD-108639]; Bolyai Janos Research Scholarship of the Hungarian Academy of SciencesHungarian Academy of Sciences [BO/00326/15/10]; Directorate For GeosciencesNational Science Foundation (NSF)NSF - Directorate for Geosciences (GEO) [1358621] Funding Source: National Science Foundation; Div Atmospheric & Geospace SciencesNational Science Foundation (NSF)NSF - Directorate for Geosciences (GEO) [1358621] Funding Source: National Science Foundation Funding text: This work has been funded by a post doc project from the Hungarian Scientific Research Fund to GU (OTKA PD-108639). Additional financial support provided by the Bolyai Janos Research Scholarship of the Hungarian Academy of Sciences (BO/00326/15/10) (GU, GV) is gratefully acknowledged. Constructive and insightful comments by Joe Mason and Thomas Stevens improved this paper substantially. Editorial handling and comments by Ian Candy is appreciated. Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi u. 45., Budapest, H-1112, Hungary Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Acaemy of Sciences, Csatkai E. u. 6-8., Sopron, H-9400, Hungary Department of Atmospheric and Oceanic Sciences, University of California, 405 Hilgard Ave, Los Angeles, CA 90095, United States Geographical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45., Budapest, H-1112, Hungary Department of Geology and Meteorology, University of Pécs, Ifjúság u. 6., Pécs, H-7624, Hungary Environmental Analytical and Geoanalytical Laboratory, Szentágothai Research Centre, University of Pécs, Ifjúság u. 20., Pécs, H-7624, Hungary Cited By :87 Export Date: 16 February 2021 Correspondence Address: Újvári, G.; Institute for Geological and Geochemical Research, Budaörsi u. 45., Hungary; email: ujvari.gabor@csfk.mta.hu Funding details: Magyar Tudományos Akadémia, MTA, BO/00326/15/10 ) Funding details: Hungarian Scientific Research Fund, OTKA Funding details: Hungarian Scientific Research Fund, OTKA, PD-108639 Funding text 1: This work has been funded by a post doc project from the Hungarian Scientific Research Fund to GÚ ( OTKA PD-108639 ). Additional financial support provided by the Bolyai János Research Scholarship of the Hungarian Academy of Sciences ( BO/00326/15/10 ) (GÚ, GV) is gratefully acknowledged. Constructive and insightful comments by Joe Mason and Thomas Stevens improved this paper substantially. Editorial handling and comments by Ian Candy is appreciated. AB - Loess deposits are recorders of aeolian activity during past glaciations. Since the size distribution of loess deposits depends on distance to the dust source, and environmental conditions at the source, during transport, and at deposition, loess particle size distributions and derived statistical measures are widely used proxies in Quaternary paleoenvironmental studies. However, the interpretation of these proxies often only considers dust transport processes. To move beyond such overly simplistic proxy interpretations, and toward proxy interpretations that consider the range of environmental processes that determine loess particle size distribution variations we provide a comprehensive review on the physics of dust particle mobilization and deposition. Furthermore, using high-resolution bulk loess and quartz grain size datasets from a last glacial/interglacial sequence, we show that, because grain size distributions are affected by multiple, often stochastic processes, changes in these distributions over time allow multiple interpretations for the driving processes. Consequently, simplistic interpretations of proxy variations in terms of only one factor (e.g. wind speed) are likely to be inaccurate. Nonetheless using loess proxies to understand temporal changes in the dust cycle and environmental parameters requires (i) a careful site selection, to minimize the effects of topography and source distance, and (ii) the joint use of bulk and quartz grain size proxies, together with high resolution mass accumulation rate calculations if possible. © 2016 Elsevier B.V. LA - English DB - MTMT ER - TY - JOUR AU - Varga, György AU - Cserháti, Csaba AU - Kovács, János AU - Szalai, Zoltán TI - Saharan dust deposition in the Carpathian Basin and its possible effects on interglacial soil formation JF - AEOLIAN RESEARCH J2 - AEOLIAN RES VL - 22 PY - 2016 SP - 1 EP - 12 PG - 12 SN - 1875-9637 DO - 10.1016/j.aeolia.2016.05.004 UR - https://m2.mtmt.hu/api/publication/3072437 ID - 3072437 N1 - Geographical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, Budapest, H-1112, Hungary Department of Solid State Physics, University of Debrecen, Bem tér 18/b, Debrecen, H-4026, Hungary Department of Geology and Meteorology, University of Pécs, Ifjúság u. 6, Pécs, H-7624, Hungary Environmental Analytical and Geoanalytical Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság u. 20, Pécs, H-7624, Hungary Department of Environmental and Landscape Geography, Institute of Geography and Earth Sciences, Faculty of Science, Eötvös University, Pázmány Péter sétany 1/c, Budapest, H-1117, Hungary Cited By :38 Export Date: 30 April 2022 Correspondence Address: Varga, G.; Geographical Institute, Budaörsi út 45, Hungary; email: varga.gyorgy@csfk.mta.hu LA - English DB - MTMT ER - TY - JOUR AU - Marković, SB AU - Stevens, T AU - Kukla, GJ AU - Hambach, U AU - Fitzsimmons, KE AU - Gibbard, P AU - Buggle, B AU - Zech, M AU - Guo, Z AU - Hao, Q AU - Wu, H AU - O'Hara, Dhand K AU - Smalley, IJ AU - Újvári, Gábor AU - Sümegi, Pál AU - Timar-Gabor, A AU - Veres, D AU - Sirocko, F AU - Vasiljević, DA AU - Jary, Z AU - Svensson, A AU - Jović, V AU - Lehmkuhl, F AU - Kovács, János AU - Svirčev, Z TI - Danube loess stratigraphy - Towards a pan-European loess stratigraphic model JF - EARTH-SCIENCE REVIEWS J2 - EARTH-SCI REV VL - 148 PY - 2015 SP - 228 EP - 258 PG - 31 SN - 0012-8252 DO - 10.1016/j.earscirev.2015.06.005 UR - https://m2.mtmt.hu/api/publication/2920426 ID - 2920426 N1 - Laboratory for Palaeoenvironmental Reconstruction, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad, 21000, Serbia Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala, 75236, Sweden Lamont-Doherty Earth Observatory of Columbia University, Rt. 9W, Palisades, NY 10964, United States BayCEER and Chair of Geomorphology, University of Bayreuth, Bayreuth, D-95440, Germany Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig, D-04103, Germany Cambridge Quaternary, Department of Geography, University of Cambridge, Downing Place, Cambridge, England, CB2 3EN, United Kingdom Geological Institute, ETH Zürich, Sonneggstr. 5, Zürich, 8092, Switzerland Soil Physics Department, University of Bayreuth, Bayreuth, D-95440, Germany Key laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 10029, China Giotto Loess Research Group, Geography Department, Leicester University, Leicester, LE1 7RH, United Kingdom Geodetic and Geophysical Research Institute of the Hungarian Academy of Sciences, Csatkai Endre u. 6-8., Sopron, H-9400, Hungary Department of Geology and Palaeontology, University of Szeged, Egyetem u. 2-6, Szeged, H-6722, Hungary Faculty of Environmental Science, Babes-Bolyai University, Fantanele, 30, Cluj Napoca, 400294, Romania Romanian Academy, Institute of Speleology, Clinicilor 5, Cluj-Napoca, 400006, Romania Institute of GeoSciences, University of Mainz, J.-J. Becher-Weg 21, Mainz, D-55128, Germany Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad, 21000, Serbia Institute of Geography and Regional Development, University of Wrocław, Pl. Uniwersytecki 1, Wrocław, 50-137, Poland Ice and Climate Research, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen, 2100, Denmark Serbian Academy of Sciences and Arts, Knez Mihajlova 35, Belgrade, 11000, Serbia Department of Geography, RWTH Aachen University, Wüllnertsr. 5b, Aachen, D-52056, Germany Department of Geology and Meteorology And Environmental Analytical and oGeoanalytical Research Group, Szentágothai Research Centre, University of Pecs, Hungary Cited By :193 Export Date: 25 May 2022 Correspondence Address: Marković, S.B.; Laboratory for Palaeoenvironmental Reconstruction, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 2, Serbia AB - The Danube River drainage basin is the second largest river catchment in Europe and contains a significant and extensive region of thick loess deposits that preserve a record of a wide variety of recent and past environments. Indeed, the Danube River and tributaries may themselves be responsible for the transportation of large volumes of silt that ultimately drive loess formation in the middle and lower reaches of this large catchment. However, this vast loess province lacks a unified stratigraphic scheme. European loess research started in the late 17th century in the Danube Basin with the work of Count Luigi Ferdinand Marsigli. Since that time numerous investigations provided the basis for the pioneering stratigraphic framework proposed initially by Kukla (1970, 1977) in his correlations of loess with deep-sea sediments. Loess-palaeosol sequences in the middle and lower reaches of the Danube River basin were a key part of this framework and contain some of the longest and most complete continental climate records in Europe, covering more than the last million years. However, the very size of the Danube loess belt and the large number of countries it covers presents a major limiting factor in developing a unified approach that enables continental scale analysis of the deposits. Local loess-palaeosol stratigraphic schemes have been defined separately in different countries and the difficulties in correlating such schemes, which often change significantly with advances in age-dating, have limited the number of basin-wide studies. A unified basin-wide stratigraphic model would greatly alleviate these difficulties and facilitate research into the wider significance of these loess records. Therefore we review the existing stratigraphic schemes and define a new Danube Basin wide loess stratigraphy based around a synthetic type section of the Mošorin and Stari Slankamen sites in Serbia. We present a detailed comparison with the sedimentological and palaeoclimatic records preserved in sediments of the Chinese Loess Plateau, with the oxygen isotope records from deep-sea sediments, and with classic European Pleistocene stratigraphic subdivisions. The hierarchy of Danubian stratigraphic units is determined by climatically controlled environmental shifts, in a similar way to the Chinese loess stratigraphic scheme. A new unified Danube loess stratigraphic model has a number of advantages, including preventing confusion resulting from the use of multiple national schemes, a more transparent basis, and the potential to set Pleistocene palaeoenvironmental changes recorded in the Danube catchment area into a global context. The use of a very simple labelling system based on the well-established Chinese loess scheme facilitates interpretation of palaeoenvironmental information reported from the Danube Basin loess sites in a wider more accessible context that can be readily correlated world-wide. This stratigraphic approach also provides, for the first time, an appropriate framework for the development of an integrated, pan-European and potentially pan-Eurasian loess stratigraphic scheme. © 2015 Elsevier B.V. LA - English DB - MTMT ER - TY - JOUR AU - Szentesi, Zoltán AU - Pazonyi, Piroska AU - Mészáros, Lukács TI - Albanerpetontidae from the Late Pliocene (MN 16A) Csarnóta 3 locality (Villány Hills, South Hungary) in the collection of the Hungarian Natural History Museum JF - FRAGMENTA PALAEONTOLOGICA HUNGARICA J2 - FRAGM PALAEONTOL HUNG VL - 32 PY - 2015 SP - 49 EP - 66 PG - 18 SN - 1586-930X DO - 10.17111/FragmPalHung.2015.32.49 UR - https://m2.mtmt.hu/api/publication/3012152 ID - 3012152 LA - English DB - MTMT ER - TY - JOUR AU - Kovács, János AU - Raucsik, Béla AU - Raucsikné Varga, Andrea Beáta AU - Újvári, Gábor AU - Varga, György AU - Ottner, F TI - Clay mineralogy of red clay deposits from the central Carpathian Basin (Hungary): Implications for Plio-Pleistocene chemical weathering and palaeoclimate JF - TURKISH JOURNAL OF EARTH SCIENCES J2 - TURK J EARTH SCI VL - 22 PY - 2013 IS - 3 SP - 414 EP - 426 PG - 13 SN - 1300-0985 DO - 10.3906/yer-1201-4 UR - https://m2.mtmt.hu/api/publication/2331930 ID - 2331930 N1 - Cited By :12 Export Date: 24 September 2019 Correspondence Address: Kovács, J.; Department of Geology, University of Pécs, Ifjúság u. 6, H-7624 Pécs, Hungary; email: jones@gamma.ttk.pte.hu AB - Geochemical and mineralogical studies of palaeosols provide essential information for palaeoclimatic and palaeoenvironmental interpretation of continental deposits and can present a proxy for palaeoclimate. Red clays in the central Carpathian Basin (Hungary) (Tengelic Red Clay Formation; Kerecsend Red Clay Formation), overlain by loess-palaeosol sequences, were studied. Results from geochemical climofunctions applied to Upper Pliocene-Lower Pleistocene red clays and palaeosols located in the Carpathian Basin, and clay mineralogy, indicate that the palaeoclimate was considerably more humid and warmer during the Late Pliocene-Early Pleistocene in comparison to modern values. © Tübi̇tak. LA - English DB - MTMT ER - TY - JOUR AU - Újvári, Gábor AU - Raucsikné Varga, Andrea Beáta AU - Ramos, F C AU - Kovács, János AU - Németh, Tibor AU - Stevens, T TI - Evaluating the use of clay mineralogy, Sr-Nd isotopes and zircon U-Pb ages in tracking dust provenance: An example from loess of the Carpathian Basin JF - CHEMICAL GEOLOGY J2 - CHEM GEOL VL - 304-305 PY - 2012 SP - 83 EP - 96 PG - 14 SN - 0009-2541 DO - 10.1016/j.chemgeo.2012.02.007 UR - https://m2.mtmt.hu/api/publication/1934996 ID - 1934996 N1 - Megjegyzés-22375086 WC: Geochemistry & Geophysics LA - English DB - MTMT ER - TY - JOUR AU - Varga, György AU - Kovács, János AU - Újvári, Gábor TI - Late Pleistocene variations of the background aeolian dust concentration in the Carpathian Basin: An estimate using decomposition of grain-size distribution curves of loess deposits JF - NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW J2 - NETH J GEOSCI VL - 91 PY - 2012 IS - 1-2 SP - 159 EP - 171 PG - 13 SN - 0016-7746 DO - 10.1017/S0016774600001566 UR - https://m2.mtmt.hu/api/publication/2104731 ID - 2104731 N1 - Megjegyzés-23636471 : Gyorgy/F-1039-2012 Geographical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaòrsi út 45, H-1112 Budapest Hungary, Hungary Department of Geology, University of Pees, Ifjúság u. 6, H-7624 Pecs, Hungary Institute of Applied Geology, BOKU, Peter Jordan Str. 70, A-1190 Vienna, Austria Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Csatkai E. u. 6-8, H-9400 Sopron, Hungary Cited By :18 Export Date: 24 September 2019 Correspondence Address: Kovács, J.; Department of Geology, University of Pees, Ifjúság u. 6, H-7624 Pecs, Hungary; email: jones@gamma.ttk.pte.hu AB - Aeolian dust deposits can be considered as one of the most important archives of past climatic changes. Alternating loess and paleosol strata display variations of the dust load in the Pleistocene atmosphere. By using the observations of recent dust storms, we are able to employ Late Pleistocene stratigraphie datasets (with accurate chronological framework) and detailed granulometric data for making conclusions on the atmospheric dust load in the past. Age-depths models, created from the absolute age data and stratigraphie interpretation, allow us to calculate sedimentation rates and dust fluxes, while grain-size specifies the dry-deposition velocity, i.e. the atmospheric residence time of mineral particles. Thus, the dust concentration can be expressed as the quotient of the dust flux and gravitational settling velocity. Recent observations helped to clarify the mechanisms behind aeolian sedimentation and the physical background of this process has nowadays been well established. Based on these two, main contrasting sedimentary modes of dust transport and deposition can be recognised: the short suspension episodes of the coarse (silt and very fine sand) fraction and the long-range transport of a fine (clay and fine silt) component. Using parametric curve fitting the basic statistical properties of these two sediment populations can be revealed for Pleistocene aeolian dust deposits, as it has been done for loess in Hungary. As we do not have adequate information on the magnitude and frequency of the Pleistocene dust storms, conclusions could only be made on the magnitude of continuous background dust load. The dust concentration can be set in the range between 1100 and 2750 ug/m3. These values are mostly higher than modern dust concentrations, even in arid regions. Another interesting proxy of past atmospheric conditions could be the visibility, being proportional to the dust concentration. According to the known empirical dust concentration - visibility equations, its value is around 6.5 to 26 kilometres. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, János AU - Fábián, Szabolcs Ákos AU - Varga, Gábor AU - Újvári, Gábor AU - Varga, György AU - Dezső, József TI - Plio-Pleistocene red clay deposits in the Pannonian basin: A review JF - QUATERNARY INTERNATIONAL J2 - QUATERN INT VL - 240 PY - 2011 IS - 1-2 SP - 35 EP - 43 PG - 9 SN - 1040-6182 DO - 10.1016/j.quaint.2010.12.013 UR - https://m2.mtmt.hu/api/publication/1618474 ID - 1618474 N1 - Megjegyzés-23331086 : Gyorgy/F-1039-2012 Megjegyzés-22375092 Z9: 2 WC: Geography, Physical; Geosciences, Multidisciplinary Megjegyzés-22001855 Z9: 2 WC: Geography, Physical; Geosciences, Multidisciplinary Department of Geology, University of Pécs, Ifjusag u. 6, H-7624 Pécs, Hungary Department of Physical Geography, University of Pécs, Ifjsag u. 6, H-7624 Pécs, Hungary Geodetic and Geophysical Research Institute, Hungarian Academy of Sciences, Csatkai E. u. 6-8, H-9400 Sopron, Hungary Geographical Research Institute, Hungarian Academy of Sciences, Budarsit 45, H-1112 Budapest, Hungary Institute of Environmental Sciences, University of Pécs, Ifjsg u. 6, H-7624 Pécs, Hungary Cited By :27 Export Date: 24 September 2019 Correspondence Address: Kovács, J.; Department of Geology, University of Pécs, Ifjusag u. 6, H-7624 Pécs, Hungary; email: jones@gamma.ttk.pte.hu AB - Terrestrial red clays underlying Quaternary loess deposits, or filling fissures and recently existing caves in limestone are named Tengelic Red Clay Formation and Kerecsend Red Clay Formation (Middle Pliocene to Lower Pleistocene). They occur in three types in Hungary. (1) The oldest red clays are mainly in situ weathering crusts rich in kaolinite, formed in warm, humid, subtropical or monsoon climate; (2) the younger type is rich in smectite and goethite; and (3) illite and chlorite dominant in the youngest part, which formed under warm and dry climates in savannah, steppe or forest steppe environments, and is of wind-blown origin. Representative samples were selected for study from a large number of profiles. Mineralogical, some micromorphological, and geochemical investigations of typical samples of red clays in Hungary were performed. This review focuses on the origin, development and distribution in the Pannonian basin. (C) 2010 Elsevier Ltd and INQUA. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Stevens, T AU - Markovic, S B AU - Michael, Zech M AU - Hambach, U AU - Sümegi, Pál TI - Dust deposition and climate in the Carpathian basin over an independently dated last glaciale/interglacial cycle JF - QUATERNARY SCIENCE REVIEWS J2 - QUATERN SCI REV VL - 30 PY - 2011 IS - 5-6 SP - 662 EP - 681 PG - 20 SN - 0277-3791 DO - 10.1016/j.quascirev.2010.12.011 UR - https://m2.mtmt.hu/api/publication/1951421 ID - 1951421 LA - English DB - MTMT ER - TY - JOUR AU - Raucsikné Varga, Andrea Beáta AU - Újvári, Gábor AU - Raucsik, Béla TI - Tectonic versus climatic control on the evolution of a loess–paleosol sequence at Beremend, Hungary: An integrated approach based on paleoecological, clay mineralogical, and geochemical data JF - QUATERNARY INTERNATIONAL J2 - QUATERN INT VL - 240 PY - 2011 IS - 1-2 SP - 71 EP - 86 PG - 16 SN - 1040-6182 DO - 10.1016/j.quaint.2010.10.032 UR - https://m2.mtmt.hu/api/publication/1394245 ID - 1394245 N1 - Megjegyzés-24849663 Megjegyzés-22001851 Z9: 1 WC: Geography, Physical; Geosciences, Multidisciplinary AB - The role of two major factors, climate and tectonism, in controlling loess-paleosol evolution has been evaluated in the present study based on a multi-proxy dataset comprising mollusc, bulk and clay mineralogical, and geochemical data. A recent trend has been to use chemical indices such as the chemical index of alteration (CIA) for paleoclimate reconstructions in loess-paleosol sequences spanning several hundreds of thousands of years, but without any tectonic interpretation. Possible effects of geodynamic factors on physical erosion, chemical weathering and consequently weathering proxies are discussed. Clearly, the relative rates of physical erosion and chemical weathering in a sedimentary environment could be significantly influenced by geodynamic factors and governed not just by climate. Intensifying tectonic uplift gives rise to enhanced physical erosion, leading to increased supply of fresh mineral surfaces having less time to react with weathering agents. In theory, this process may point towards decreasing chemical weathering in a sequence without any real changes of climate. In the studied loess-paleosol sequence at Beremend (Hungary) a trend of decreasing chemical weathering has been observed, which can be explained by a global climate deterioration and accelerating uplift in and around the sedimentary basin. Increasing dust sedimentation could theoretically also contribute to this process as a result of increasing aridification and wind strength reflecting climate change in weathering records following a non-linear amplification. The findings refer to the fact that the impact of tectonism should also be taken into consideration in tracing past chemical weathering trends on timescales of hundreds of thousands (or millions) of years. This is because tectonic effects may impose on the CIA signal and distort it suggesting a potential bias in reconstructing paleoclimate change based only on this proxy from certain loess sequences associated with young orogenic belts. (C) 2010 Elsevier Ltd and INQUA. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Újvári, Gábor AU - Kovács, János AU - Varga, György AU - Raucsik, Béla AU - Markovic, SB TI - Dust flux estimates for the Last Glacial Period in East Central Europe based on terrestrial records of loess deposits: a review JF - QUATERNARY SCIENCE REVIEWS J2 - QUATERN SCI REV VL - 29 PY - 2010 IS - 23-24 SP - 3157 EP - 3166 PG - 10 SN - 0277-3791 DO - 10.1016/j.quascirev.2010.07.005 UR - https://m2.mtmt.hu/api/publication/1361069 ID - 1361069 N1 - Geodetic and Geophysical Research Institute of the Hungarian Academy of Sciences, Csatkai Endre u. 6-8., H-9400 Sopron, Hungary Department of Geology, University of Pécs, Ifjúság u. 6., H-7624 Pécs, Hungary Department of Earth and Environmental Sciences, University of Pannonia, Egyetem u. 10., H-8200 Veszprém, Hungary Department of Physical Geography, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia Cited By :76 Export Date: 22 May 2022 CODEN: QSRED Correspondence Address: Újvári, G.; Geodetic and Geophysical Research Institute of the Hungarian Academy of Sciences, Csatkai Endre u. 6-8., H-9400 Sopron, Hungary; email: ujvari@ggki.hu LA - English DB - MTMT ER - TY - JOUR AU - Kovács, János AU - Varga, György AU - Dezső, József TI - Comparative study on the Late Cenozoic red clay deposits from China and Central Europe (Hungary) JF - GEOLOGICAL QUARTERLY J2 - GEOL Q VL - 52 PY - 2008 IS - 4 SP - 369 EP - 381 PG - 13 SN - 1641-7291 UR - https://m2.mtmt.hu/api/publication/1177744 ID - 1177744 N1 - Megjegyzés-20524821 380.o. bibl. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, János TI - Grain-size analysis of the Neogene red clay formation in the Pannonian Basin JF - INTERNATIONAL JOURNAL OF EARTH SCIENCES J2 - INT J EARTH SCI VL - 97 PY - 2008 IS - 1 SP - 171 EP - 178 PG - 8 SN - 1437-3254 DO - 10.1007/s00531-006-0150-2 UR - https://m2.mtmt.hu/api/publication/1110974 ID - 1110974 LA - English DB - MTMT ER - TY - JOUR AU - Török, Ákos TI - Controls on development of Mid-Triassic ramps: examples from southern Hungary JF - GEOLOGICAL SOCIETY SPECIAL PUBLICATIONS J2 - GEOL SOC SPEC PUBL VL - 149 PY - 1998 SP - 339 EP - 367 PG - 29 SN - 0305-8719 DO - 10.1144/GSL.SP.1999.149.01.16 UR - https://m2.mtmt.hu/api/publication/1635999 ID - 1635999 N1 - Cited By :41 Export Date: 15 June 2021 Correspondence Address: Török, Á.; Department of Geology, Sztoczek u. 2, H-1521 Budapest, Hungary; email: torok@bigmac.eik.bme.hu AB - During Mid-Triassic time the palaeogeographical-tectonic setting of the northern Tethyan passive margin and epicontinental basins favoured the ramp morphology, as broad flat areas were available for flooding and establishment of carbonate sedimentation. Throughout this time, in what is now southern Hungary, homoclinal ramps developed, which also exhibit some evidence of partial distal steepening. The nearly 1 km thick Anisian-Ladinian Muschelkalk carbonates are grouped into six depositional units. In each ramp unit facies types were identified representing coastal sabkhas, inner ramp peritidal facies, backshoal lagoons, oolite shoals, storm to fair-weather influenced mid-ramps, proximal to distal shell beds and low-energy outer ramps. Mid- and inner ramp carbonates make up the majority of the successions. The deepest outer ramp facies correspond to the peak transgression of a second-order Triassic sea-level rise. In the Hungarian Muschelkalk three major transgressive-regressive sequences were identified. In Germany, Poland and Spain much thinner and slightly coarser Muschelkalk carbonate successions were formed in the same Mid-Triassic interval. The major sediment redistribution processes were related to storms that generated coquinas, and mud flow deposits. Slow, early diagenesis and the predominance of unstable muddy substrate led to the formation of small-scale slumps, slides and plastic deformation. The fauna reflects the prevalence of carbonate mud and temporarily high-stress conditions. A non 'cool water' origin of this ramp is inferred from the presence of evaporites, early dolomization of inner ramp carbonates, the biota and the palaeogeographical setting. The major controlling factors of Mid-Triassic ramps were the gentle antecedent morphology, the subtropical climate, the high production of carbonate mud and the lack of reef-building organisms, as well as the passive margin setting, which resulted in a moderate and relatively uniform subsidence rate over a wide area. LA - English DB - MTMT ER -