TY - JOUR AU - Sági, Tamás AU - Józsa, Sándor AU - Janka, Péter AU - Káposztás, Viktória AU - Oelberg-Pánczél, Emese AU - Szendrei, Zsolt AU - Szücs, Levente Csaba AU - Virág, Attila TI - Csiszolt kőeszközök nyersanyagtípusainak csoportosítása mágneses szuszceptibilitás, tömeg, térfogat, sűrűség és magasság alapján : Esettanulmány Bátaszék-Alsónyékről JF - ARCHEOMETRIAI MŰHELY J2 - ARCHEOMETRIAI MŰHELY VL - 21 PY - 2024 IS - 2 SP - 89 EP - 100 PG - 12 SN - 1786-271X DO - 10.55023/issn.1786-271X.2024-009 UR - https://m2.mtmt.hu/api/publication/34751077 ID - 34751077 AB - A csiszolt kőeszközök nyersanyagának pontos meghatározására az egyszerű makroszkópos kőzethatározástól kezdve a legkorszerűbb műszeres vizsgálatokig számos módszert alkalmaznak. A gyakran nagyszámú kőeszközből álló leletegyüttesek egyes nyersanyagtípusainak reprezentatív, nagyműszeres vizsgálatra szánt példányainak kiválasztása jelentős kihívás a geológusok számára. Jelen kutatás célja, hogy kísérletet tegyünk csiszolt kőeszközök nyersanyagtípusai közötti különbségek meghatározására egyszerűen mérhető jellemzőik (tömeg, térfogat, sűrűség, mágneses szuszceptibilitás és vastagság) standardizált főkomponens elemzése alapján. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Román, Zsófia AU - Segesdi, Martin AU - Sebe, Krisztina AU - Földes, Tamás AU - Bakrač, Koraljka AU - Virág, Attila AU - Botfalvai, Gábor TI - Palaeontological and taphonomical investigations of the exceptionally rich concentration of Miocene vertebrate coprolites from Pécs-Danitzpuszta (Hungary, Mecsek Mts.) JF - HISTORICAL BIOLOGY J2 - HIST BIOL PY - 2024 PG - 16 SN - 0891-2963 DO - 10.1080/08912963.2024.2324435 UR - https://m2.mtmt.hu/api/publication/34728890 ID - 34728890 N1 - Institute of Geography and Earth Sciences, Department of Paleontology, Eötvös Loránd University (ELTE), Budapest, Hungary Department of Zoology, Hungarian Natural History Museum, Budapest, Hungary Department of Paleontology and Geology, Hungarian Natural History Museum, Budapest, Hungary HUN-REN-MTM-ELTE Research Group for Paleontology, Budapest, Hungary TOMOGEO Kft, Szolnok, Hungary Department of Geology, Croatian Geological Survey, Zagreb, Croatia Institute of Geography and Earth Sciences, Department of Petrology and Geochemistry, Eötvös Loránd University (ELTE), Budapest, Hungary Institute of Earth Sciences, Department of Mineralogy & Geology, University of Debrecen, Debrecen, Hungary Export Date: 18 March 2024 Correspondence Address: Román, Z.; Institute of Geography and Earth Sciences, Pázmány Péter sétány 1/c, Hungary; email: zsofia.m.roman@gmail.com AB - Thousands of coprolites have been collected from the Upper Miocene (Tortonian/Pannonian) sands of the Pécs-Danitzpuszta sand pit, one of the most important mixed Neogene vertebrate localities in Hungary. Although, the locality has been known for centuries, the coprolites have not been investigated in detail. We describe these fossils and explore their palaeoecological significance. Coprolites were examined with thin sections, X-ray powder diffraction and computed tomography. Their surface is mostly smooth, desiccation cracks were not observed. All coprolites mainly consist of apatite, indicating most probably a carnivorous diet. No evidence of herbivory has been found so far. The coprolites contain remains belonging to several groups: ostracod carapaces, bivalve shells, vertebrae from bony fishes, fish scales, as well as teeth. The CT scans show inhomogeneities in the matrix; however, in most cases they do not reliably indicate inclusions. The taphonomical features suggest rapid burial and most likely an aquatic origin. The spiral morphotype could be attributed to fishes with spiral intestinal valves. Teeth of reef-associated fish taxa indicate Badenian age for some specimens, though the coprolite assemblage might include older and younger specimens as well. LA - English DB - MTMT ER - TY - JOUR AU - Cserép, Barbara AU - Szemerédi, Máté AU - Harangi, Szabolcs AU - Erdmann, S AU - Bachmann, O AU - Dunkl, István AU - Seghedi, I AU - Mészáros, K AU - Kovács, Zoltán AU - Virág, Attila AU - Ntaflos, T AU - Schiller, D AU - Molnár, Kata AU - Haranginé Lukács, Réka TI - Constraints on the pre-eruptive magma storage conditions and magma evolution of the 56–30 ka explosive volcanism of Ciomadul (East Carpathians, Romania) JF - CONTRIBUTIONS TO MINERALOGY AND PETROLOGY J2 - CONTRIB MINERAL PETR VL - 178 PY - 2023 IS - 12 PG - 31 SN - 0010-7999 DO - 10.1007/s00410-023-02075-z UR - https://m2.mtmt.hu/api/publication/34402475 ID - 34402475 AB - A detailed mineral-scale study was conducted on pumices of the latest, dominantly explosive eruption epoch (56–30 ka) of Ciomadul, the youngest, long-dormant volcano in eastern-central Europe for characterizing the magma storage system and for understanding better the changes in eruption style from effusive to explosive. The mineral cargo of dacitic pumices enables us to constrain the conditions of the pre-recharge crystal mush, the recharge magmas and the post-recharge magma prior to eruptions. A careful evaluation of the results yielded by various thermometers, barometers, oxybarometers, chemometers and hygrometers as well as direct comparison with experimental data were necessary to select the appropriate techniques and therefore to constrain the conditions for the Ciomadul magmatic system. Beneath the volcano, a felsic crystal mush body is inferred at 8–12 km depth comprising slightly oxidized (0.5–1.6 ∆NNO), low-temperature (680–750 °C), highly crystalline magma. This zone is underlain by a deep magma storage zone with less evolved, hot (> 900 °C) magma at 16–40 km depth. The dominantly explosive volcanism after the effusive eruptions (160–90 ka) can be explained by the ascent of distinct recharge magmas. They contained high-Mg (MgO > 18 wt%) amphibole, which could have crystallized from ultrahydrous (H 2 O > 8 wt%) magma at near-liquidus conditions. The rates of amphibole overgrowth and microphenocryst formation require weeks to months for the magma mixing and the eruption events. The hybridized melt became more oxidized and contained dissolved water in around 5.5 wt% at temperature of 790–830 °C calculated from the re-equilibrated Fe-Ti oxides. These magma properties along with the degree of crystallinity (27–38 vol% crystals) favored rapid magma ascent and an explosive style eruption. Thus, the strongly hydrous nature of the recharge magma in addition to the crystallinity and H 2 O content of the pre-eruption magma plays an important role in controlling the eruption style. LA - English DB - MTMT ER - TY - CHAP AU - Csillag, Gábor AU - Pazonyi, P. AU - Virág, Attila AU - Tóthné, Makk Á. AU - Sebe, Krisztina AU - Fodor, László AU - Ruszkiczay-Rüdiger, Zsófia AU - Harangi, Szabolcs AU - Sztanó, Orsolya AU - Kaiser, Miklós AU - Gyalog, László AU - Mindszenty, Andrea AU - Novothny, Ágnes AU - Horváth, Erzsébet AU - Újvári, Gábor AU - Bakacsi, Zsófia AU - Lantos, Zoltán ED - Babinszki, Edit ED - Piros, Olga ED - Csillag, Gábor ED - Fodor, László ED - Gyalog, László ED - Kercsmár, Zsolt ED - Less, György ED - Haranginé Lukács, Réka ED - Sebe, Krisztina ED - Selmeczi, Ildikó ED - Szepesi, János ED - Sztanó, Orsolya TI - Kvarter T2 - Magyarország litosztratigráfiai egységeinek leírása II. PB - Szabályozott Tevékenységek Felügyeleti Hatósága CY - Budapest SN - 9789636713294 PY - 2023 SP - 143 EP - 166 PG - 24 UR - https://m2.mtmt.hu/api/publication/34004354 ID - 34004354 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Virág, Attila AU - Karádi, Viktor TI - Potential of closed contour analysis for species differentiation and holotype designation: a case study on lower Norian (Upper Triassic) conodonts JF - PALAEONTOLOGY J2 - PALAEONTOLOGY VL - 66 PY - 2023 IS - 2 PG - 17 SN - 0031-0239 DO - 10.1111/pala.12649 UR - https://m2.mtmt.hu/api/publication/33768817 ID - 33768817 N1 - Smith Paul szerk. AB - Geometric morphometric approaches become increasingly applied in the fields of biology and palaeontology. Taxonomy is a good example, where a long-standing intention of scientists is to eliminate subjectivity as much as possible. In the case of biostratigraphically important conodont elements, the application of such methods is not widespread. Only a handful of studies attempted to deal with the morphological variance of conodont elements from this aspect. The detailed description of five lower Norian (Upper Triassic) taxa (Ancyrogondolella quadrata, A. rigoi, A. triangularis, A. uniformis and Metapolygnathus mazzai) is presented here based on landmarks and Fourier analysis of the P1 element and keel outlines. Both methods led to similar outcomes regarding taxonomic differentiation and exposing shape variability. Consensus shapes were generated to objectively reveal the typical contour shape of each taxon, which allowed their comparison with each other, and with the members of their respective sample population including the holotypes. The results demonstrated that the holotype of a taxon is generally not an average representative, but rather a peripheral form with well separable morphological characteristics. Ancyrogondolella quadrata and A. rigoi turned out to represent a morphological continuum with ample transitional forms between these two end-members that may cause bias in their biostratigraphic applicability, however their combined shape variance seems to be too large for uniting them into a single species. Given the results that may be too subtle to realize based solely on qualitative observations, future taxonomic studies and type material designation could greatly benefit from the application of similar methodologies. LA - English DB - MTMT ER - TY - CHAP AU - Cserép, Barbara AU - Szemerédi, Máté AU - Haranginé Lukács, Réka AU - Erdmann, S AU - Bachmann, O AU - Dunkl, I AU - Seghedi, I AU - Mészáros, K AU - Kovács, Zoltán AU - Virág, Attila AU - Ntaflos, T AU - Harangi, Szabolcs ED - Fehér, Béla ED - Molnár, Kata ED - Haranginé Lukács, Réka ED - Czuppon, György ED - Kereskényi, Erika TI - Magmás környezetek a Csomád 56‒32 ezer éves horzsakövei alapján T2 - Calce et malleo – Mésszel és kalapáccsal PB - Csillagászati és Földtudományi Kutatóközpont CY - Budapest SN - 9789637331008 PY - 2022 SP - 29 EP - 29 PG - 1 UR - https://m2.mtmt.hu/api/publication/33111922 ID - 33111922 LA - Hungarian DB - MTMT ER - TY - BOOK ED - Bosnakoff, Mariann ED - Virág, Attila ED - Szives, Ottilia ED - Főzy, István TI - 25. Magyar Őslénytani Vándorgyűlés, Tótvázsony, 2022 Program, előadáskivonatok, kirándulásvezető PB - Magyarhoni Földtani Társulat CY - Budapest PY - 2022 SP - 70 SN - 9789638221872 UR - https://m2.mtmt.hu/api/publication/32900662 ID - 32900662 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Magyari, Enikő Katalin AU - Gasparik, Mihály AU - Major, István AU - Lengyel, György AU - Pál, Ilona AU - Virág, Attila AU - Korponai, János AU - Haliuc, Aritina AU - Szabó, Zoltán AU - Pazonyi, Piroska TI - Mammal extinction facilitated biome shift and human population change during the last glacial termination in East-Central Europe JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 12 PY - 2022 IS - 1 PG - 14 SN - 2045-2322 DO - 10.1038/s41598-022-10714-x UR - https://m2.mtmt.hu/api/publication/32795556 ID - 32795556 N1 - A publikáció a Nemzeti Közszolgálati Egyetem 2020. évi Tématerületi Kiválóság Program keretében, a Fenntartható biztonság és társadalmi környezet elnevezésű projekt támogatásával valósult meg, az Innovációs és Technológiai Minisztérium Nemzeti Kutatási, Fejlesztési és Innovációs Alapból nyújtott támogatásával, a Nemzeti Kutatási, Fejlesztési és Innovációs Hivatal által kibocsátott támogatói okirat alapján. AB - The study of local extinction times, together with the associated environmental and human population changes in the last glacial termination, provides insights into the causes of mega- and microfauna extinctions. In East-Central (EC) Europe, groups of Palaeolithic humans were present throughout the last glacial maximum, but disappeared suddenly around 15,200 cal BP. In this study cave sediment profiles dated using radiocarbon techniques and a large set of mammal bones dated directly by AMS 14C were used to determine local extinction times. These were, in turn, compared to changes in the total megafauna population of EC Europe derived from coprophilous fungi, the Epigravettian population decline, quantitative climate models, pollen and plant macrofossil inferred climate, as well as to biome reconstructions. The results suggest that the population size of large herbivores decreased in the area after 17,700 cal BP, when temperate tree abundance and warm continental steppe cover both increased in the lowlands. Boreal forest expansion started around 16,200 cal BP. Cave sediments show the decline of narrow-headed vole and arctic lemming populations specifically associated with a tundra environment at the same time and the expansion of the common vole, an inhabitant of steppes. The last dated appearance of arctic lemming was at ~ 16,640 cal BP, while that of the narrow-headed vole at ~ 13,340, and the estimated extinction time of woolly mammoth was either at 13,830 (GRIWM) or 15,210 (PHASE), and reindeer at 11,860 (GRIWM) or 12,550 cal BP (PHASE). The population decline of the large herbivore fauna slightly preceded changes in terrestrial vegetation, and likely facilitated it via a reduction in the intensity of grazing and the concomitant accumulation of plant biomass. Furthermore, it is possible to conclude that the Late Epigravettian population had high degree of quarry-fidelity; they left the basin when these mammals vanished. LA - English DB - MTMT ER - TY - GEN AU - Magyari, Enikő Katalin AU - Gasparik, Mihály AU - Major, István AU - Lengyel, György AU - Pál, Ilona AU - Virág, Attila AU - Korponai, János AU - Szabó, Zoltán AU - Pazonyi, Piroska TI - Mammal Extinction Facilitated Biome Shift and Human Population Change During the Last Glacial Termination in East-Central Europe PY - 2021 SP - 1 EP - 27 PG - 27 DO - 10.21203/rs.3.rs-778658/v1 UR - https://m2.mtmt.hu/api/publication/32245959 ID - 32245959 LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Bence AU - Virág, Attila TI - Wearing down the constraints of low magnification tooth microwear analysis: reproducibility and variability of results based on extant ungulates. JF - PALAEONTOLOGISCHE ZEITSCHRIFT J2 - PALAEONTOL Z VL - 95 PY - 2021 SP - 515 EP - 529 PG - 15 SN - 0031-0220 DO - 10.1007/s12542-020-00539-2 UR - https://m2.mtmt.hu/api/publication/31818441 ID - 31818441 N1 - Department of Palaeontology, Eötvös Loránd University, Budapest, 1117, Hungary Hungarian Academy of Sciences, Institute for Nuclear Research, ICER, Debrecen, 4026, Hungary MTA-MTM-ELTE Research Group for Palaeontology, Budapest, 1117, Hungary Export Date: 4 January 2023 Correspondence Address: Szabó, B.; Department of Palaeontology, Hungary; email: szabobence.pal@gmail.com LA - English DB - MTMT ER -