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Pannonian Ostracods from the Southwestern Transylvanian Basin

Kovács, Erika and Magyar, Imre and Sztanó, Orsolya and Pipík, Radovan (2016) Pannonian Ostracods from the Southwestern Transylvanian Basin. GEOLOGIA CROATICA : JOURNAL OF THE CROATIAN GEOLOGICAL SURVEY AND THE CROATIAN GEOLOGICAL SOCIETY, 69 (2). pp. 213-229. ISSN 1330-030X (print); 1333-4875 (online)

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Abstract

Pannonian (Late Miocene) ostracods were investigated from 7 outcrops, exposing deep-water lacustrine sediments along the western margin of the Transylvanian Basin. Sedimentological patterns in the outcrops indicate deposition in sublittoral to profundal environments where fine-grained, suspension fall-out sediments are intercalated with various types of mass transport deposits, most commonly turbidites. The ostracod fauna, consisting of 30 taxa, is dominated by endemic species of the brackish Lake Pannon. The assemblages indicate a mixture of deep-water (sublittoral to profundal) species, such as Paratethyan Candoninae, and shallow-water (littoral) species, belonging to Cyprideis, Loxoconcha, Amnicythere and Hemicytheria. The mixed character of the assemblages is most probably a consequence of the reworking of littoral specimens into deeper environments, a phenomenon also observed in the molluscan fauna from some of the investigated outcrops. Alternatively, some endemic and extinct species of the littoral ge nera might have adapted to the deep-water environment. A significant decrease in the abundance and diversity of ostracods from west to east is interpreted reflecting increasingly distal environments. The ostracod fauna indicates the Hemicytheria hungarica (2 outcrops), Hemicytheria tenuistriata (3 outcrops), and Propontoniella candeo Zones (2 outcrops) of the lower Pannonian Slavonian Substage.

Item Type: Article
Subjects: Q Science / természettudomány > QH Natural history / természetrajz > QH526 Paleontology / őslénytan
Depositing User: Piroska Pazonyi
Date Deposited: 18 Nov 2021 10:45
Last Modified: 18 Nov 2021 11:20
URI: http://real.mtak.hu/id/eprint/133624

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