TY - JOUR AU - Galácz, András TI - The way we were geology students at the Eötvös University, Budapest in the 1960’s JF - FÖLDTANI KÖZLÖNY J2 - FÖLDTANI KÖZLÖNY VL - 154 PY - 2024 IS - 1 SP - 81 EP - 94 PG - 14 SN - 0015-542X UR - https://m2.mtmt.hu/api/publication/35078821 ID - 35078821 LA - English DB - MTMT ER - TY - JOUR AU - Galácz, András AU - Földvári, Gabriella TI - Heteromorph ammonite Parapatoceras from the Lower Callovian of Villány, South Hungary JF - FÖLDTANI KÖZLÖNY J2 - FÖLDTANI KÖZLÖNY VL - 154 PY - 2024 IS - 1 SP - 59 EP - 64 PG - 6 SN - 0015-542X DO - 10.23928/foldt.kozl.2024.154.1.59 UR - https://m2.mtmt.hu/api/publication/35074245 ID - 35074245 AB - In the rich Middle Jurassic ammonite fauna of the famous ammonitic bank of Villány, South Hungary, recently a Parapatoceras specimen was found. This ammonite, a Callovian heteromorph, usually occurs in Callovian assemblages in Europe and elsewhere, however, the appearance in the Villány fauna, known on the basis of thousands of specimens and worked out in two classic monographs, seems to be a true rarity. The specimen is formally described, and previous records of Middle Jurassic heteromorph ammonites from Hungary are briefly summarized. LA - English DB - MTMT ER - TY - JOUR AU - Galácz, András AU - Vörös, Attila TI - In memoriam Dr. Géczy Barnabás JF - FÖLDTANI KÖZLÖNY J2 - FÖLDTANI KÖZLÖNY VL - 153 PY - 2023 IS - 1 SP - 3 EP - 14 PG - 12 SN - 0015-542X UR - https://m2.mtmt.hu/api/publication/34756065 ID - 34756065 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Galácz, András TI - On a Middle Jurassic phylloceratid ammonite from the Bakony Mts (Hungary) JF - FÖLDTANI KÖZLÖNY J2 - FÖLDTANI KÖZLÖNY VL - 153 PY - 2023 IS - 1 SP - 15 EP - 18 PG - 4 SN - 0015-542X DO - 10.23928/foldt.kozl.2023.153.1.15 UR - https://m2.mtmt.hu/api/publication/33879636 ID - 33879636 N1 - Export Date: 26 May 2023; Cited By: 0; Correspondence Address: A. Galácz; ELTE TTK Földrajz-és Földtudományi Intézet, Őslénytani Tanszék, Budapest, Pázmány Péter sétány 1/c, 1117, Hungary; email: andras.galacz@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Galácz, András TI - Occurrence of the peculiar ammonites Phlycticeras and Oecoptychius in the Callovian (Middle Jurassic) of the Villány Hills (South Hungary) JF - GEOLOGICA BALCANICA J2 - GEOL BALCAN VL - 51 PY - 2022 IS - 3 SP - 51 EP - 56 PG - 6 SN - 0324-0894 DO - 10.52321/GeolBalc.51.3.51 UR - https://m2.mtmt.hu/api/publication/33542195 ID - 33542195 N1 - Export Date: 23 February 2023 Correspondence Address: Galácz, A.; Department of Palaeontology, Pázmány Péter sétány 1/c, Hungary; email: andras.galacz@gmail.com AB - New fossil collections from two Callovian (Middle Jurassic) localities of the South Hungarian Villány Hills (Villány, Templom Hill Quarry and Siklós, Rózsa Quarry) include specimens of the rare ammonite genus Phlycticeras and the sporadic Oecoptychius. A review is given herein on the previously published and newly found Villány specimens. Dimorphism, as well as the palaeogeographical distribution of the genera, is also briefly discussed. LA - English DB - MTMT ER - TY - JOUR AU - Galácz, András TI - Kheraiceras, the Callovian (Middle Jurassic) dimorphic ammonite genus in the South Hungarian Mecsek and Villany Mts. JF - NEUES JAHRBUCH FÜR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN J2 - NEUES JAHRB GEOL P-A VL - 299 PY - 2021 IS - 3 SP - 275 EP - 290 PG - 16 SN - 0077-7749 DO - 10.1127/njgpa/2021/0969 UR - https://m2.mtmt.hu/api/publication/31970815 ID - 31970815 AB - Kheraiceras, this group of well-distinguishable Callovian tulitid ammonites is commonly subordinated to Bullatimorphites, a similar, but morphologically and stratigraphically differing genus. The species of their corresponding dimorphic pairs, Bomburites and Sphaeroptychius, are also classified very differently by various authors. The confusion has been partly caused by the presence of small so-called bullati' in the Late Bathonian which are close to Bomburites in size and Bullatimorphites in morphology. From the group of these small macroconchs, a new species Bullatimorphites (Bullatimorphites) szontaghi n. sp. is introduced. The aim of the paper is to document the full generic state of the morphologically and stratigraphically distinguished Kheraiceras and its subgenerically classified microconch Bomburites. This is supported by descriptions of species of both subgenera from the South Hungarian Mecsek and Villany Mts. LA - English DB - MTMT ER - TY - JOUR AU - Galácz, András TI - Rare and new Late Bathonian (Middle Jurassic) ammonites from Monte Kumeta, western Sicily JF - NEUES JAHRBUCH FÜR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN J2 - NEUES JAHRB GEOL P-A VL - 291 PY - 2019 IS - 3 SP - 231 EP - 252 PG - 22 SN - 0077-7749 DO - 10.1127/njgpa/2019/0798 UR - https://m2.mtmt.hu/api/publication/30615660 ID - 30615660 N1 - Export Date: 26 November 2019 Correspondence Address: Galácz, A.; Department of Palaeontology, Eötvös L. University, Pázmány Péter sétány 1/c, Hungary; email: galacz@ludens.elte.hu AB - The Middle Jurassic sequence of the West Sicilian Monte Kumeta contains a faunal level with a very rich Late Bathonian ammonite assemblage. The typical Tethyan fauna with many representatives of phylloceratids and lytoceratids also yielded oppeliids, perisphinctids and other diagnostic forms (incl. the index Prohecticoceras blanazense Elmi, 1967) to date the assemblage as the lower, Blanazense Subzone of the Prohecticoceras retrocostatum Zone. The probably lower position of the assemblage within the Retrocostatum Zone precedes the general appearance of the Bathonian heteromorph genus Parapatoceras, thus two new genera (Kumetaceras n. gen, with type species K. enigmaticum n. sp. and Sikeliceras n. gen. with type species S. costatum n. sp.) are of special interest from the point of view of the origin and/or dimorphism of Bathonian-Callovian heteromorphs. Other new forms are also described: the strigoceratid Phlycticeras tenue n. sp., the oppeliid Paroecotraustes minor n. sp. and the perisphinctid Sicilisphinctes n. gen. (with type species S. incertus n. sp.) and Albanesiceras n. gen. (with type species A. damianoi n. sp.). Some other, rare ammonites are described in detail, further forms are figured and discussed shortly. LA - English DB - MTMT ER - TY - JOUR AU - Ősi, Attila AU - Young, MT AU - Galácz, András AU - Rabi, Márton TI - A new large-bodied thalattosuchian crocodyliform from the Lower Jurassic (Toarcian) of Hungary, with further evidence of the mosaic acquisition of marine adaptations in Metriorhynchoidea JF - PEERJ J2 - PEERJ VL - 6 PY - 2018 PG - 37 SN - 2167-8359 DO - 10.7717/peerj.4668 UR - https://m2.mtmt.hu/api/publication/3376497 ID - 3376497 AB - Based on associated and three-dimensionally preserved cranial and postcranial remains, a new thalattosuchian crocodyliform, Magyarosuchus fitosi gen. et sp. nov. from the Lower Jurassic (Upper Toarcian) Kisgerecse Marl Formation, Gerecse Mountains, Hungary is described here. Phylogenetic analyses using three different datasets indicate that M. fitosi is the sister taxon of Pelagosaurus typus forming together the basal-most sub-clade of Metriorhynchoidea. With an estimated body length of 4.67-4.83 m M. fitosi is the largest known non-metriorhynchid metriorhynchoid. Besides expanding Early Jurassic thalattosuchian diversity, the new specimen is of great importance since, unlike most contemporaneous estuarine, lagoonal or coastal thalattosuchians, it comes from an 'ammonitico rosso' type pelagic deposit of the Mediterranean region of the Tethys. A distal caudal vertebra having an unusually elongate and dorsally projected neural spine implies the presence of at least a rudimentary hypocercal tail fin and a slight ventral displacement of the distal caudal vertebral column in this basal metriorhynchoid. The combination of retaining heavy dorsal and ventral armors and having a slight hypocercal tail is unique, further highlighting the mosaic manner of marine adaptations in Metriorhynchoidea. LA - English DB - MTMT ER - TY - JOUR AU - Price, GD AU - Fozy, I AU - Galácz, András TI - Carbon cycle history through the Middle Jurassic (Aalenian - Bathonian) of the Mecsek Mountains, Southern Hungary JF - GEOLOGICA CARPATHICA J2 - GEOL CARPATH VL - 69 PY - 2018 IS - 2 SP - 117 EP - 127 PG - 11 SN - 1335-0552 DO - 10.1515/geoca-2018-0007 UR - https://m2.mtmt.hu/api/publication/3364410 ID - 3364410 N1 - Cited By :1 Export Date: 8 July 2022 Correspondence Address: Price, G.D.; School of Geography, United Kingdom; email: g.price@plymouth.ac.uk AB - A carbonate carbon isotope curve from the Aalenian-Bathonian interval is presented from the Obanya valley, of the Mecsek Mountains, Hungary. This interval is certainly less well constrained and studied than other Jurassic time slices. The Obanya valley lies in the eastern part of the Mecsek Mountains, between Obanya and Kisujbanya and provides exposures of an Aalenian to Lower Cretaceous sequence. It is not strongly affected by tectonics, as compared to other sections of eastern Mecsek of the same age. In parts, a rich fossil assemblage has been collected, with Bathonian ammonites being especially valuable at this locality. The pelagic Middle Jurassic is represented by the Komlo Calcareous Marl Formation and thin- bedded limestones of the Obanya Limestone Formation. These are overlain by Upper Jurassic siliceous limestones and radiolarites of the Fonyaszo Limestone Formation. Our new data indicate a series of carbon isotope anomalies within the late Aalenian and early-middle Bajocian. In particular, analysis of the Komlo Calcareous Marl Formation reveals a negative carbon isotope excursion followed by positive values that occurs near the base of the section (across the Aalenian-Bajocian boundary). The origin of this carbon-isotope anomaly is interpreted to lie in significant changes to carbon fluxes potentially stemming from reduced run off, lowering the fertility of surface waters which in turn leads to lessened primary production and a negative delta C-13 shift. These data are comparable with carbonate carbon isotope records from other Tethyan margin sediments. Our integrated biostratigraphy and carbon isotope stratigraphy enable us to improve stratigraphic correlation and age determination of the examined strata. Therefore, this study of the Komlo Calcareous Marl Formation confirms that the existing carbon isotope curves serve as a global standard for Aalenian-Bathonian delta C-13 variation. LA - English DB - MTMT ER - TY - JOUR AU - Galácz, András TI - Bajocian (middle jurassic) ammonites of stratigraphical and palaeobiogeographical importance from Mombasa, Kenya, East Africa JF - GEODIVERSITAS J2 - GEODIVERSITAS VL - 39 PY - 2017 IS - 4 SP - 717 EP - 727 PG - 11 SN - 1280-9659 DO - 10.5252/g2017n4a4 UR - https://m2.mtmt.hu/api/publication/3357440 ID - 3357440 N1 - Cited By :4 Export Date: 28 August 2023 Correspondence Address: Galácz, A.; Department of Palaeontology, Pázmány Péter sétány 1/C, Hungary; email: galacz@ludens.elte.hu AB - Collections of Middle Jurassic ammonites made at the Mwachi River locality, near Mombasa in the late 1980‘s and early 1990‘s are described. They support previous research concluding a Late Bajocian age for the major or the upper part of the ‘Posidonia shales’, immediately below and above the dividing Massive (Coral) Limestone. The ammonite species are figured and briefly described. Two Upper Bajocian ammonite zones are evidenced: A lower assemblage indicates the Strenoceras niortense Zone and a higher one belonging to the Garantiana garantiana Zone. Most of the ammonites are Tethyan forms with abundant phylloceratids and lytoceratids, some indicating connections with coeval Arabian and Sinai faunas. Palaeobiogeographically the assemblages suggest a deep-water position on the East-African Gondwana margin, with strong faunistic influence from the open Tethys and very restricted connections with the Arabian shallow water regions. © Publications scientifiques du Muséum national d’Histoire naturelle, Paris. LA - English DB - MTMT ER -