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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Discontinuity Surfaces In Upper Cretaceous To Paleogene Carbonates Of Central Dalmatia (Croatia): Glossifungites Ichnofacies, Biogenic Calcretes, And Stratigraphic Implications, Mihovil Brlek, Tvrtko Korbar, Adrijan Košir, Bosiljka Glumac, Anita Grizelj, Bojan Otoničar
Discontinuity Surfaces In Upper Cretaceous To Paleogene Carbonates Of Central Dalmatia (Croatia): Glossifungites Ichnofacies, Biogenic Calcretes, And Stratigraphic Implications, Mihovil Brlek, Tvrtko Korbar, Adrijan Košir, Bosiljka Glumac, Anita Grizelj, Bojan Otoničar
Geosciences: Faculty Publications
Substrate-controlled ichnofacies and biogenic calcretes represent key features for identification and interpretation of discontinuities in the carbonate rock record, which are of great significance for stratigraphic interpretations and correlations. Intraformational firmground and composite surfaces, as well as a regional Cretaceous to Paleogene (K-Pg) subaerial unconformity, developed in Upper Cretaceous to Paleogene intra-platform peritidal successions in central Dalmatia, Croatia (Adriatic-Dinaridic Carbonate Platform, ADCP), were analyzed for their trace fossil and subaerial exposure features. Thalassinoides (probably T. paradoxicus) box-work burrow systems of the substrate-controlled Glossifungites ichnofacies characterize the two documented firmgrounds and one composite (polygenic) surface. Rhizogenic laminar calcretes developed subsequently inside …
Stable Isotopic (Δ13C And Δ18O) Signatures Of Biogenic Calcretes Marking Discontinuity Surfaces: A Case Study From Upper Cretaceous Carbonates Of Central Dalmatia And Eastern Istria, Croatia, Mihovil Brlek, Bosiljka Glumac
Stable Isotopic (Δ13C And Δ18O) Signatures Of Biogenic Calcretes Marking Discontinuity Surfaces: A Case Study From Upper Cretaceous Carbonates Of Central Dalmatia And Eastern Istria, Croatia, Mihovil Brlek, Bosiljka Glumac
Geosciences: Faculty Publications
Biogenic calcretes associated with a regional Cretaceous to Paleogene subaerial unconformity and an intraformational composite (polygenic) surface in Upper Cretaceous intra-platform peritidal successions in central Dalmatia and eastern Istria, Croatia (Adriatic-Dinaridic Carbonate Platform), were analyzed for their δ13C and δ18O signatures in order to provide insight into the conditions of subaerial exposure and calcrete development. The distinctly negative δ13C signatures of biogenic calcretes marking the regional subaerial unconformity differ considerably from the δ13C values of the host marine limestones. This indicates carbon isotope exchange of primary marine CaCO3 with CO2 released by root and rhizomicrobial respiration and subsequent precipitation of …
Evolution Of The Veternica Cave (Medvednica Mountain, Croatia) Drainage System: Insights From The Distribution And Dating Of Cave Deposits, Damir Lacković, Bosiljka Glumac, Yemane Asmerom, Andrej Stroj
Evolution Of The Veternica Cave (Medvednica Mountain, Croatia) Drainage System: Insights From The Distribution And Dating Of Cave Deposits, Damir Lacković, Bosiljka Glumac, Yemane Asmerom, Andrej Stroj
Geosciences: Faculty Publications
Detailed field examination, U-Th age dating, and stable isotope analysis of Veternica flowstone and shelfstone deposits have been employed in order to unravel details about the geological history of Veternica Cave (Medvednica Mountain, Croatia). The study was carried out in the hydrologically inactive part of the main cave channel, which is developed mainly along the unconformity between Triassic dolostone and Miocene limestone. For 180 m from the cave entrance, (located at 320 metres above sea level (asl)), the morphology of the main channel reflects exclusively phreatic conditions in the cave until the end of its hydrological activity. From 180 to …
Climatic Cycles Recorded In The Middle Eocene Hemipelagites From A Dinaric Foreland Basin Of Istria (Croatia), Borna Lužar-Oberiter, Peter A. Hochuli, Ljubomir Babić, Bosiljka Glumac, Darko Tibljas
Climatic Cycles Recorded In The Middle Eocene Hemipelagites From A Dinaric Foreland Basin Of Istria (Croatia), Borna Lužar-Oberiter, Peter A. Hochuli, Ljubomir Babić, Bosiljka Glumac, Darko Tibljas
Geosciences: Faculty Publications
Middle Eocene hemipelagic marls from the Pazin-Trieste Basin, a foreland basin of the Croatian Dinarides, display repetitive alternations of two types of marls with different resistance to weathering. This study focuses on the chemical composition, stable isotopes, and palynomorph content of these marls in order to better understand the nature of their cyclic deposition and to identify possible paleoenvironmental drivers responsible for their formation. The less resistant marls (LRM) have consistently lower carbonate content, lower δ18O and δ13C values, and more abundant dinoflagellate cysts than the more resistant marls (MRM). We interpret these differences between the two marl types to …
Stable Isotope Analysis Of Upper Tithonian Limestones With Dinosaur Footprints From Kirmenjak Quarry (Istria, Croatia), Blanka Cvetko Tešović, Aleksandar Mezga, Bosiljka Glumac
Stable Isotope Analysis Of Upper Tithonian Limestones With Dinosaur Footprints From Kirmenjak Quarry (Istria, Croatia), Blanka Cvetko Tešović, Aleksandar Mezga, Bosiljka Glumac
Geosciences: Faculty Publications
The Kirmenjak locality of western Istria, Croatia, represents the oldest evidence of a dinosaur presence on the Adriatic-Dinaridic Carbonate Platform (ADCP). In a quarry at this locality, almost a thousand sauropod footprints are recognized in one distinctive trackbearing horizon within the Upper Tithonian limestones. The stable isotopes of oxygen and carbon, in conjunction with microfacies analysis of carbonate rocks exposed in this quarry, unravel details about the marginal marine or coastal environments in which sauropods left their footprints. Rocks from the trackbearing horizon, and laterally adjacent area, represent intertidal fenestral mudstones that form the top of a shallowing-upward succession, capped …