Formal definition and description of lithostratigraphic units related to the Miocene silicic pyroclastic rocks outcropping in Northern Hungary: A revision

• DOI: 10.31577/geolcarp.73.2.3
• Publication Date: 2022-06-15T11:04:01Z
• Authors: Réka Lukács; Szabolcs Harangi; Péter Gál; János Szepesi; Andrea Di Capua; Gianluca Norini; Roberto Sulpizio; Gianluca Groppelli; László Fodor
• Keywords: Outcrop; Silicic; Neogene

Repeated explosive eruptions of large volume silicic magmas during the early-to mid-Miocene resulted in pyroclastic deposits covering at least 50,000 km 2 Pannonian Basin.They form extended marker horizons and therefore these formations have a great stratigraphic importance.Lithostratigraphic characterization classification rocks go back for more than century been used widely geological mapping among other things.In this paper, we outline former stratigraphical schemes developed products Northern Hungary; however, using new geochronological, volcanological, petrological, geochemical results, propose revision lithostratigraphic units, including unit names as well.Four main units are distinguished, named, described following International Stratigraphic Guide.Stratotypes revised were also redefined based on accessibility representativeness.The four newly-defined following:(1) The Tihamér Rhyolite Lapilli Tuff Formation (formerly Gyulakeszi Fm.), 18.2-17.1Ma (Ottnangian-Karpatian);(2) Bogács Dacite classified into Tar 16.8-16.2Ma (Karpatian);(3) Formation, 15.1-14.8Ma (Badenian) (4) Harsány 14.7-14.4Ma -four formerly existing merged latter.Three corresponding distal volcanic recognized around Hungary beyond Basin well.A correlation scattered can be made lithological characteristics, well chemical composition glass shards, juvenile clasts, zircon.