Ostrakodna združba zgornjemiocenskih plasti na Bizeljskem

Marinšek, Miha (author), Gale, Luka (mentor), Kolar-Jurkovšek, Tea (co-mentor)

Namen magistrske naloge je bila določitev ostrakodne zdužbe, paleookolja in starosti Bizeljske formacije v Krški kotlini. V ta namen je bil raziskan 43 metrov debel odsek formacije na območju Bizeljskega. Ostrakodi Bizeljske formacije pripadajo družinam Cyprididae, Cytheridae, Darwinulidae in Loxoconchidae. Določenih je bilo 36 vrst. Šest morfoloških oblik sem lahko določil le do nivoja rodu. Dva morfološka tipa sta ostala nedoločena zaradi slabe ohranjenosti njunih valv. Najbolj pogosti rodovi so Candona, Hemicytheria in Cyprideis. Združba pripada Candona (Caspiocypris) labiata bioconi iz zgornjega pontija. Na podlagi ostrakodne združbe je okolje opredeljeno kot estuarij s prevladujočimi morskimi razmerami in z občasnimi vdori sladke vode. Slanost vode je znašala med 5-30‰.

• Language: Slovenian
• Keywords: ostrakodi, taksonomija, pontij, Krška kotlina
• Work type: Master's thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2020
• PID: 20.500.12556/RUL-119245
• COBISS.SI-ID: 30974467
• Publication date in RUL: 05.09.2020

Secondary language

• Language: English
• Title: Ostracod fauna from upper Miocene beds from Bizeljsko

Abstract

The purpose of this master's thesis was to determine the ostracod assemblage, paleoenvironmental conditions and age of the Bizeljsko Formation in the Krško Basin. To fulfill this task, a 43 meters thick section of the formation in the Bizeljsko area was investigated. The determined ostracods belong to the families Cyprididae, Cytheridae, Darwinulidae and Loxoconchidae. In total, 36 species were identified. Six morphotypes were determined at the genus level. Two morphotypes of the carapaces could not be determined due to poor preservation. The most common genera are Candona, Hemicytheria, and Cyprideis. The assemblage belongs to the Candona (Caspiocypris) labiata biozone from the upper Pontian. Based on the ostracode community, the environment is defined as estuarine with occasional frashwater conditions. Water salinity is estimated at 5-30 ‰.

• Keywords: ostracods, taxonomy, Pontian, Krško Basin