Upper Triassic foraminifera from the Northern Calcareous Alps, Austria Zgornjetriasne foraminifere iz Severnih apneniških Alp, Avstrija Foraminiferal assemblages and proportions of foraminiferal morphogroups were determined from Upper Triassic deposits of the Eiberg Basin and the Hallstatt Zone of the Northern Calcareous Alps in Austria (Eastern Alps). Foraminifera were hand-picked from the residue of marl samples taken from the upper Norian Pötschenkalk Formation, the middle–upper Rhaetian Zlambach Formation, and the uppermost Rhaetian Tiefengraben Member of the Kendlbach Formation. In total, 72 species from 31 genera were determined. Foraminiferal assemblages from the Pötschenkalk Formation at the Thälerergraben section are relatively diverse.Dentalina, Ammodiscus, Nodosaria, and Glomospirella dominate. Foraminiferal assemblages from the Zlambach Formation at the Rossmoos-/Stambachgraben section are also abundant and diverse. The most common foraminifera are Reophax, Dentalina, and Annulina. The uppermost Kössen Formation at the Schlossgraben section is dominated by hyaline taxa. The most common genera are Ichthyolaria, Lenticulina, and Nodosaria. At the Fonsjoch section, the uppermost Kössen Formation contains Lenticulina, Astacolus, and Trochammina. An increase in opportunists suggests variations in oxygen levels during the deposition of the uppermost Kössen Formation. The Kendlbach Formation at the Schlossgraben section is dominated by Lagenida over agglutinated taxa. Astacolus, Lenticulina, and Trochammina are the most common genera. At the Fonsjoch section, the Kendlbach Formation contains mostly Ast acolus, followed by Trochammina, Ammobaculites, Reophax, and Lenticulina. Increases in opportunists point to increased stressful conditions. An increase in nodosariid foraminifera higher up the section indicates a return to better oxygenated conditions. V okviru pričujoče raziskave smo določili foraminiferne združbe in foraminiferne morfoskupine iz zgornjetriasnih in spodnje spodnjejurskih plasti bazena Eiberg in območja Hallstatt današnjih Severnih Apneniških Alp v Avstriji (Vzhodne Alpe). Foraminifere so bile ročno pobrane iz netopnega ostanka vzorcev laporja iz zgornjenorijske Pötschenkalk formacije, srednje–zgornjeretijske Zlambach formacije in zgornjeretijskega dela Tiefengraben člena Kendlbach formacije. Skupno je bilo določenih 72 vrst, ki pripadajo 31 rodovom. Foraminiferne združbe Pötschenkalk formacije v profilu Thälerergraben so vrstno razmeroma bogate. Prevladujejo rodoviDentalina, Ammodiscus, Nodosariain Glomospirella. Foraminiferne združbe iz Zlambach formacije v Rossmoos-/Stambachgraben profilu so podobno raznolike in številčne. Najbolj pogosti rodovi so Reophax, Dentalina in Annulina. V najvišjih delih Kössen formacije profila Schlossgraben prevladujejo foraminifere s hialinsko steno. Najbolj pogosti rodovi so Ichthyolaria, Lenticulina in Nodosaria. Zgornja Kössen formacija pri Fonsjochu vsebuje foraminifere rodov Lenticulina, Astacolus in Trochammina. Porast deleža oportunistov v vrhnjem delu Kössen formacije kaže na spreminjajočo količino kisika. V Kendlbach formaciji profila Schlossgraben prevladuje skupina Lagenida. Preostanek pripada aglutiniranim primerkom. Najbolj pogosti rodovi so Astacolus, Lenticulinain Trochammina. V profilu Fonsjoch Kendlbach formacija od foraminifer vsebuje večinoma rod Astacolus. Sledijo Trochammina, Ammobaculites, Reophax in Lenticulina. Porast v deležu oportunistov kaže na stresne pogoje. Tem kmalu sledijo bolje prezračene razmere in večji delež nodosariid. Upper Triassic Pötschenkalk Zlambach Formation Kössen Formation Kendlbach Formation morphogroup zgornji trias zgodnja jura Pötschenkalk Zlambach formacija Kössen formacija Kendlbach formacija morfoskupina true false true Angleški jezik Slovenski jezik Neznano 2026-07-06 11:02:54 2026-07-06 11:02:54 2026-07-07 03:51:15 0000-00-00 00:00:00 2026 0 0 str. 93-142 no. 1 vol. 69 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-06-22 56 0016-7789 10.5474/geologija.2026.005 283533315 1951-Article_Text-12342730-1-10-20260622.pdf 1951-Article_Text-12342730-1-10-20260622.pdf 1 75243799858859B5859EFC91AD9A5A85 a95a0127a5a0bdc231453ef99382207a9dc42567319b825f988525aa7cb80cbe 0b2f4232-791a-11f1-b02e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47115 1951-Article_Text-12342731-1-10-20260622-1.pdf 1951-Article_Text-12342731-1-10-20260622-1.pdf 1 39F4043C48071F3B30213074FB0C30DC b03e87a80ff1eeaa1eabae8d1fee47b7380e10eb11a81feae2aabd99f6e31230 794f7587-791a-11f1-b02e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47116 1951-Article_Text-12342732-1-10-20260622.xlsx 1951-Article_Text-12342732-1-10-20260622.xlsx 1 1F51C6D7C1980BF8D920824CC77DB9F8 c8849fc715b37a1966491c1882cde9055f6a293fd960f32b9aec1fba90eb15eb 8859ff70-791a-11f1-b02e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47117 Geološki zavod Slovenije 0 0 0