A5085818922- Paleontology and Stratigraphy of Fossils
- Paleontology and Evolutionary Biology
- Geological Formations and Processes Exploration
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Evolution and Paleontology Studies
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Morphological variations and asymmetry
- Geology and Paleoclimatology Research
- Marine and environmental studies
Eötvös Loránd University
2017-2024
Abstract The Norian represents the longest stage of Triassic, nevertheless, its precise subdivision is an unresolved matter. Conodonts might be useful in establishment accurate biozonation to avoid common scientific misinterpretations. Understanding evolutionary trends and morphological changes Ancyrogondolella lineage (genus descendant genera Epigondolella, Orchardella Mockina ) key importance this issue. forward shifting pit posterior prolongation keel carina characterize main trend that...
Two significant stratigraphical microfossils, conodonts and radiolarians, are usually used for the Upper Triassic chronostratigraphy. The Baoshan Block was located in eastern Tethys during Late where biostratigraphical data of still poorly known. We collected new samples from Hongyan section (HY) study. This 24-m-thick Dabaozi Village, City, is mainly composed thin-layered limestones, sandstone siltstone. conodont fauna referred to Sevatian 1 (late Norian), which species Mockina englandi,...
Abstract During their last phase of evolution, the pectiniform conodont elements manifested an evident trend simplification and miniaturization. This started from late Norian (Sevatian) in Late Triassic evolutionary process genus Mockina to Parvigondolella , particular between bidentata andrusovi is one most significant examples. has been reported worldwide since it was first described early 1970s. However, recently suggested that ecostratigraphic morphotype thus a phenotype controlled by...
Abstract This study presents the results of conodont biostratigraphy and microfacies analysis carried out on pelagic limestones Upper Triassic Dovško Section in Slovenia, which represents eastern part Slovenian Basin. The age section ranges from Lacian 1 to Alaunian 1. succession is predominantly characterized by representatives genus Ancyrogondolella . Transitional morphologies towards faunas first appear 3 become common during Lacian-Alaunian transition. evolutionary development coincides...
A total of 125 samples from core the Csővár borehole (north-central Hungary) were investigated for conodont bio- and carbon-isotope chemostratigraphy. This 620 m thick continuous pelagic carbonate succession comprises strata upper Carnian to Rhaetian, including both, Carnian-Norian Norian-Rhaetian stage boundaries. The mass occurrence Metapolygnathus communisti group followed by Primatella gulloae mark base Norian in lowermost part section, which allows good correlation with Pizzo Mondello...
The stratigraphic and paleoecologic investigations of the Middle Triassic Kádárta section western part Transdanubian Range (Hungary) let an insight to drowning isolated carbonate platform deposition following pelagic successions in deep neritic bathyal environment. biostratigraphic radiometric ages revealed presence a gap between Pelsonian (Middle Anisian) shallow-marine carbonates overlying deep-water succession, since onset sedimentation was dated as late Illyrian (latest Anisian). This...
The Norian "chaotic carbon episode" stands out as a compelling cycle perturbation event within the Late Triassic period. This episode has been documented in marine stratigraphic sections across North America, Italy, Japan, and China. However, limited chronostratigraphy available eastern Tethys inhibited identification of this broad area, thus possible global response to perturbation. To address issue, we analyzed conodonts carbon-isotope Sanhedong (SHD) section Simao terrane, Southwest...
Abstract Mockina slovakensis , thought to have evolved from Epigondolella praeslovakensis is an important species of the Norian (Upper Triassic), generally considered as representative uppermost Alaunian upper Sevatian in Tethys. The previous description M. was incomplete, thus has led some misidentifications. We update and discuss its comparisons occurrence based on new conodont investigations Dolomia di Forni data literatures. assemblage succession dominated by along with rare postera E. ....
Abstract Geometric morphometric approaches become increasingly applied in the fields of biology and palaeontology. Taxonomy is a good example, where long‐standing intention scientists to eliminate subjectivity as much possible. In case biostratigraphically important conodont elements, application such methods not widespread. Only handful studies attempted deal with morphological variance elements from this aspect. The detailed description five lower Norian (Upper Triassic) taxa (...
Three Middle Anisian carbonate platforms (Barnag, Tagyon and Kádárta Platforms) surrounded by the hemipelagic Felsőörs Basin have been reconstructed in Balaton Highland. The truncated surface of all is covered basinal carbonates volcanic rocks Vászoly Formation. Based on conodont investigations these were subject to drowning at different times. earliest was recognized late Pelsonian southern edge Barnag Platform (Paragondolella bulgarica Zone). This date correlates well with opening a...
Abstract The issue of oversimplified Norian conodont taxonomy has set back the development biostratigraphy western Tethys Realm for decades. majority stratigraphic studies used name Epigondolella multidentata , a North American endemic, to gather specimens indicative strata from lower part middle substage. Detailed biostratigraphic investigations were carried out on hemipelagic cherty dolostones Mátyás Hill section in Buda Hills (Hungary) order resolve ‘ problem’. age ranges upper substage...
<p>Conodont biozonation of the Norian (Upper Triassic) Western Tethys realm is in development from 1970’s, however, a satisfactory scheme has not yet been established. The problem originates over-simplified taxonomy conodonts, since biostratigraphic investigations have never coupled with thorough and detailed systematic studies. Even zonal schemes proposed after millennium were based mainly on species described second half...