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Iskalni niz: "avtor" (Tea Kolar-Jurkov%C5%A1ek) .

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1.
Microfossils from Middle Triassic beds near Mišji Dol, central Slovenia
Katja Oselj, Tea Kolar-Jurkovšek, Bogdan Jurkovšek, Luka Gale, 2023, izvirni znanstveni članek

Povzetek: Middle Triassic beds exposed along the road between Mišji Dol and Poljane pri Primskovem (Posavje Hills) comprise marlstone, tuff, volcaniclastic sandstone, and thin- to medium-bedded limestone and dolostone. The succession was logged and sampled for conodonts. A relatively rich conodont assemblage was determined, consisting of Budurovignathus gabrielae Kozur, Budurovignathus sp., Cratognathodus kochi (Huckriede), Gladigondolella malayensis Nogami, Gladigondolella tethydis Huckriede, Gladigondolella sp., Neogondolella balkanica Budurov & Stefanov, Neogondolella cf. excentrica Budurov & Stefanov, Neogondolella constricta (Mosher & Clark), Neogondolella cornuta Budurov & Stefanov,Neogondolella sp., Paragondolella excelsa Mosher, Paragondolella liebermani (Kovacs & Kozur), Paragondolella trammeri (K o z u r), Paragondolella cf. alpina (Kozur & Mostler), and Paragondolella sp. The assemblage correlates with the upper Anisian and lowermost Ladinian assemblages from the Global Boundary Stratotype Section and Point (GSSP) of the Ladinian at Bagolino in the Southern Alps in northern Italy. Along with conodonts, numerous specimens of benthic foraminifera Nodobacularia? vujisici Urošević & Gaździcki were recovered from the lowermost part of the succession. Previous research on this taxon is critically evaluated.
Ključne besede: Dinarides, Sava Folds, Middle Triassic, upper Anisian, lower Ladinian, basin, volcaniclastics, conodonts, foraminifera
Objavljeno v DiRROS: 15.01.2024; Ogledov: 138; Prenosov: 47
.pdf Celotno besedilo (11,54 MB)

2.
Pseudofurnishius (Conodonta) from the Triassic Drežnica section, Bosnia and Herzegovina
Tea Kolar-Jurkovšek, Carlos Martínez Pérez, Hazim Hrvatović, Dunja Aljinović, Špela Goričan, Ferid Skopljak, Bogdan Jurkovšek, 2023, izvirni znanstveni članek

Povzetek: Triassic strata in the Drežnica section, Bosnia and Herzegovina have been examined biostratigraphically. The limestone and dolostone strata were deposited in deep pelagic environment. The conodont faunas are marked by prevailing elements of the genus Pseudofurnishius including clusters that enabled to distinguish the huddlei (lower Longobardian) and murcianus (upper Longobardian–?Cordevolian) Zones, the later fauna is characterized by the presence of Budurovignathus with rare representation of Gladigondolella and Paragondolella. This is the first report on recovery of Pseudofurnishius in the region.
Ključne besede: Ladinian–?Carnian, conodonts, Pseudofurnishius, Budurovignathus, paleogeography, Dinarides
Objavljeno v DiRROS: 06.09.2023; Ogledov: 251; Prenosov: 114
.pdf Celotno besedilo (7,77 MB)

3.
Upper Miocene ostracods from the Krško Basin, SE Slovenia
Miha Marinšek, Valentina Hajek-Tadesse, Marijan Poljak, Tea Kolar-Jurkovšek, Luka Gale, 2023, izvirni znanstveni članek

Povzetek: The purpose of this study was to identify the ostracod assemblage from a 43 m thick section of the Bizeljsko Formation, which constitutes the middle part of the Upper Miocene Posavje Group. The succession comprises sandstone, siltstone, and marlstone, deposited in a delta front environment. The determined ostracods belong to the families Cyprididae, Cytheridae, Darwinulidae, and Loxoconchidae. In total, 30 species were identified. Additionally, 8 morphotypes were determined at the genus level. The most common genera are Candona, Hemicytheria, and Cyprideis. The assemblage belongs to the Caspiocypris labiata subzone from the upper Pannonian. The ostracod assemblage from the Krško Basin is similar in species composition to Pannonian ostracod assemblages from Croatia and Serbia.
Ključne besede: Lake Pannon, Bizeljsko Formation, Pannonian, biostratigraphy, palaeoenvironment
Objavljeno v DiRROS: 27.07.2023; Ogledov: 274; Prenosov: 139
.pdf Celotno besedilo (8,96 MB)

4.
Spathian (Lower Triassic) conodonts from the Tirolites cassianus beds in Paleotethys-issued North Dobrogea Orogen (Romania)
Tea Kolar-Jurkovšek, Yanlong Chen, Eugen Grǎdinaru, Bogdan Jurkovšek, 2023, izvirni znanstveni članek

Povzetek: The paper documents a conodont fauna from Lower Triassic deposits of Paleotethys-issued North Dobrogea Orogen. The studied strata exposed in the Tulcea Veche Quarry are characterized by the presence of diversified molluscs, including the ammonoid Tirolites cassianus (Quenstedt) and the bivalve Crittendenia decidens (Bittner). The site also represents the type locality of the coelacanth fish Dobrogeria aegyssensis Cavin & Grădinaru. The recovered conodont fauna is marked by Icriospathodus crassatus (Orchard), Neospathodus robustispinus Zhao & Orchard, Novispathodus abruptus (Orchard), Nv. brochus (Orchard), Nv. aff. brochus (Orchard), Tr. ex gr. homeri (Bender), Tr. hungaricus (Kozur & Mostler), Tr. ex gr. hungaricus (Kozur & Mostler), Tr. symmetricus (Orchard), Tr. aff. symmetricus (Orchard), and Triassospathodus sp. that is correlated with the Tr. symmetricus Zone.
Ključne besede: biostratigraphy, Olenekian, Tulcea Veche Quarry, Romania
Objavljeno v DiRROS: 06.02.2023; Ogledov: 394; Prenosov: 124
.pdf Celotno besedilo (6,52 MB)

5.
A glimpse of the lost Upper Triassic to Middle Jurassic architecture of the Dinaric Carbonate Platform margin and slope
Boštjan Rožič, Luka Gale, Primož Oprčkal, Astrid Švara, Tomislav Popit, Lara Kunst, Dragica Turnšek, Tea Kolar-Jurkovšek, Andrej Šmuc, Aljaž Iveković, Jan Udovč, David Gerčar, 2022, izvirni znanstveni članek

Povzetek: In the southernmost outcrops of the Slovenian Basin the Middle Jurassic coarse-grained limestone breccia (mega)beds are interstratified within a succession that is otherwise dominated by hemipelagites and distal turbidites. In this paper, these beds are described as the Ponikve Breccia Member of the Tolmin Formation. We provide descriptions of the studied sections with detailed geological maps and analysis of the breccia lithoclasts. From the latter, a non-outcropping margin of the Dinaric Carbonate Platform is reconstructed. In the Late Triassic the platform margin was characterized by a Dachstein-type marginal reef. After the end-Triassic extinction event, the platform architecture remained, but the reefs were replaced by sand shoals characterized by ooids. In the late Early Jurassic and/or early Middle Jurassic a slope area might have been dissected by normal faults and a step-like paleotopography was formed. In the Bajocian, during a period of major regional geodynamic perturbations, extensional or transtensional tectonic activity intensified and triggered the large-scale collapses of the Dinaric Carbonate Platform margin producing the limestone breccias described herein. This may in turn have caused a backstepping of the platform margin, as is evident from the occurrence of Late Jurassic marginal reefs that are installed directly above the Upper Triassic and Lower Jurassic inner platform successions.
Ključne besede: Slovenian Basin, Dinaric Carbonate Platform, Middle Jurassic, limestone breccia, debris-flow, stratigraphy, Ponikve breccia
Objavljeno v DiRROS: 18.01.2023; Ogledov: 482; Prenosov: 380
.pdf Celotno besedilo (24,45 MB)
Gradivo ima več datotek! Več...

6.
Low-grade metamorphic rocks of the Tethys subduction–collision zone in the Medvednica Mt. (NW Croatia)
Mirko Belak, Damir Slovenec, Tea Kolar-Jurkovšek, Vesnica Garašić, Zoltán Pécskay, Darko Tibljaš, Ivan Mišur, 2022, izvirni znanstveni članek

Povzetek: The low-grade metasedimentary rocks of Medvednica Mt. (Northwest Croatia) are associated with ortho-greenschists (metabasalts). The Lower to Upper Triassic age of the protolith of the low-grade metamorphic rocks belonging to the Stari Potok, Adolfovac, Tusti Breg, Bliznec, Mrzljak, and Sljeme lithostratigraphic units is determined on the basis of conodonts and field relationships. The metamorphic age of the Triassic metasedimentary rocks from the Risnjak lithostratigraphic units is assumed to be Jurassic. Petrographic and geochemical analyses of ortho-greenschists point to a tholeiite basic magmatic protolith rock having T-MORB (transitional midocean-ridge basalt) characteristics. The ortho-greenschists of the Sljeme lithostratigraphic unit underwent retrograde metamorphism and show metamorphic zoning from the epidote–amphibolite facies to the lower parts of the greenschist facies. However, the greenschists of the Tusti Breg and Bliznec units are characterized by prograde metamorphism ranging from lower to higher greenschist facies. This metamorphism is associated with Jurassic subduction (165–150 Ma) and closure of the Western Tethys. Retrograde metamorphism took place during the collision of the Adriatic and Eurasian plates in the Lower Cretaceous (125–110 Ma).
Ključne besede: Mt. Medvednica, greenschists, prograde–retrograde metamorphism, T-MORB, subduction–collision, Western Tethys
Objavljeno v DiRROS: 25.07.2022; Ogledov: 459; Prenosov: 170
.pdf Celotno besedilo (9,87 MB)

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