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Upper Triassic–to Lower Cretaceous Slovenian Basin successions in the northern margin of the Sava Folds
Benjamin Scherman, Boštjan Rožič, Ágnes Görög, Szilvia Kövér, László Fodor, 2023, izvirni znanstveni članek

Povzetek: The evolution of the Slovenian Basin southern margin is currently interpreted based on the successions outcropping in the surroundings of Škofja Loka, on the Ponikve Plateau and in the foothills of the Julian Alps in western Slovenia, as well as from the valley of the Mirna River in south-eastern Slovenia. However, no extensive research on this paleogeographic unit has been carried out in the northern part of the Sava Folds region. Recent field observations permitted the recognition of Upper Triassic to lowermost Cretaceous successions of the Slovenian Basin, including the recently described Middle Jurassic Ponikve Breccia Member of the Tolmin Formation. Based on reambulation-type geological mapping, macroscopic facies observations supported by microfacies analysis and biostratigraphy, three stratigraphic columns were constructed showcasing Slovenian Basin formations on the northern flank of the Trojane Anticline (Sava Folds region). These newly described successions encompass Upper Triassic (Bača Dolomite Formation) and Jurassic–lowermost Cretaceous resedimented limestones and pelagic formations, while the attribution of the Pseudozilian Formation is complex. Based on facies characteristics these successions are similar to those preserved in the Podmelec Nappe (lowermost thrust unit of the Tolmin Nappe) in western Slovenia. The connection between the western and the eastern Slovenian Basin during the Late Triassic-Early Cretaceous interval could be thus recognised.
Ključne besede: Southern Alps, Sava Folds, Slovenian Basin, Jurassic, Ponikve Breccia, stratigraphy, foraminifera
Objavljeno v DiRROS: 15.01.2024; Ogledov: 134; Prenosov: 73
.pdf Celotno besedilo (27,89 MB)

Atmosphere–cryosphere interactions during the last phase of the Last Glacial Maximum (21 ka) in the European Alps
Costanza Del Gobbo, Renato R. Colucci, Giovanni Monegato, Manja Žebre, Filippo Giorgi, 2023, izvirni znanstveni članek

Povzetek: Evidence that during the Last Glacial Maximum (LGM) glaciers extended well into the piedmont plains is still identifiable in the alpine foreland as a system of well-preserved moraines. Glaciers are strongly controlled by temperature and precipitation, and therefore, they are excellent indicators of climate change. Here, we use a regional climate model (RCM) to investigate some of the physical processes sustaining Alpine glaciers during the last phase of the LGM during Greenland Stadial 2 at 21 ka. We find a predominance of convection during summer and increased southwesterly stratiform precipitation over the southern Alps when compared to pre-industrial (PI) conditions. This precipitation pattern, along with lower temperatures, determined summer snowfall extending to low elevations, with a consequent substantial drop of the equilibrium line altitude (ELA), which is consistent with the estimated LGM glacier extent. Our RCM-based estimates of 21 ka ELA at the LGM yield excellent consistency with Alpine ELA reconstructions, further demonstrating the great potential of this technique for use in palaeoclimate studies.
Ključne besede: Quaternary, ice age, atmosphere, glaciers, climate change, the Alps
Objavljeno v DiRROS: 19.09.2023; Ogledov: 279; Prenosov: 105
.pdf Celotno besedilo (10,56 MB)

Neogene block rotation inside the dextral fault zone at the Adriatic-European collision zone: reexamination of existing results
Lea Žibret, Gorazd Žibret, 2023, izvirni znanstveni članek

Povzetek: The study focused on the post-Middle-Miocene stress analysis within the dextral strike-slip zone of the Dinaric fault system in the collision zone between the European plate, the Adria microplate and the Pannonian Domain. Block rotations were studied by re-examination of available paleostress data and their spatial distribution. The results are in agreement with the existing block model of the area, indicating CCW rotations within blocks between the main strike-slip faults in which rotation angle increases from W to E. The improved kinematic model, which is proposed in this study, will contribute to the knowledge on the kinematics within the complex collision zones and improve the seismic hazard models.
Ključne besede: collision zone, NW External Dinarides, Southern Alps, paleostress tensor, strike-slip zone, block rotation
Objavljeno v DiRROS: 06.07.2023; Ogledov: 303; Prenosov: 130
.pdf Celotno besedilo (8,47 MB)

Seismic activity in the Celje Basin (Slovenia) in Roman times—archaeoseismological evidence from Celeia
Miklós Kázmér, Petra Jamšek Rupnik, Krzysztof Gaidzik, 2023, izvirni znanstveni članek

Povzetek: Searching for unknown earthquakes in Slovenia in the first millennium, we performed archaeoseismological analysis of Roman settlements. The Mesto pod mestom museum in Celje exhibits a paved Roman road, which suffered severe deformation. Built on fine gravel and sand from the Savinja River, the road displays a bulge and trench, pop-up structures, and pavement slabs tilted up to 40°. The city wall was built over the deformed road in Late Roman times, supported by a foundation containing recycled material (spolia) from public buildings, including an emperor’s statue. We hypothesize that a severe earthquake hit the town before 350 AD, causing widespread destruction. Seismic-induced liquefaction caused differential subsidence, deforming the road. One of the nearby faults from the strike-slip Periadriatic fault system was the seismic source of this event.
Ključne besede: paleoseismology, Periadriatic fault system, active tectonics, Southern Alps, Pannonian Basin, Dinarides
Objavljeno v DiRROS: 14.02.2023; Ogledov: 407; Prenosov: 131
.pdf Celotno besedilo (4,04 MB)

Depositional environment of the Middle Triassic Strelovec Formation on Mt. Raduha, Kamnik-Savinja Alps, northern Slovenia
Primož Miklavc, Bogomir Celarc, 2022, izvirni znanstveni članek

Povzetek: The Raduha section represents a continuation of the research of the Anisian Strelovec Formation in the Kamnik-Savinja Alps. The Strelovec Formation was deposited during the Anisian on a drowned section of the Serla Dolomite carbonate platform in a restricted probably outer ramp environment associated with an intraplatform basin. The base of the section is represented by dolostone breccia containing angular carbonate lithoclasts of shallow-marine origin. This is followed by alternations of laminated and homogenous hemipelagic limestones deposited in a restricted and anoxic environment. Hemipelagic sedimentation was occasionally interrupted by clay input and deposition of sediments from gravity mass flows. Slow filling of the basin lead to a gradual cessation of anoxic conditions and sedimentation of bedded shallow-marine limestones. After shallow water conditions were established, bioclastic dolostone of the Contrin Formation was deposited.
Ključne besede: Southern Alps, bituminous limestones, restricted basin, intraformational breccia, Anisian, facies analysis
Objavljeno v DiRROS: 18.01.2023; Ogledov: 638; Prenosov: 208
.pdf Celotno besedilo (9,10 MB)
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The Rigelj Formation, a new lithostratigraphic unit of the Lower Permian in the Karavanke Mountains (Slovenia/Austria)
Matevž Novak, Karl Krainer, 2022, izvirni znanstveni članek

Povzetek: The Rigelj Formation is a new lithostratigraphic unit of the Lower Permian Rattendorf Group in the Karavanke Mountains. The Formation is up to 105 m thick and mainly composed of siliciclastic and fossiliferous carbonate sediments that are entirely of shallow-marine setting. Conglomerates are interpreted as shoreface deposits, sandstones as deposits of the upper to lower shoreface, and fossiliferous siltstones as offshore deposits. Fossiliferous limestones were deposited in a shallow, open-marine shelf environment of moderate to low energy (wackestone, floatstone) and strong water turbulence (packstone, rudstone). The siliciclastic and carbonate lithotypes form some well-developed backstepping cycles starting with conglomerates, overlain by sandstones, siltstones and fossiliferous limestones that formed in an open shelf environment without siliciclastic influx. Similar sedimentary cycles are developed in the Grenzland Formation of the Carnic Alps. The fusulinid fauna indicates that the Rigelj Formation ranges in age from the late Asselian to the middle Sakmarian. In the western Karavanke Mountains and near Trögern, the Lower Permian lithostratigraphic succession is very similar to the succession in the Carnic Alps with Tarvis Breccia resting on the Trogkofel Limestone and the Goggau Limestone. Unlike this, in the central part of the Karavanke Mountains (Dovžanova Soteska–Mt. Pleschiwetz/Plešivec area) the Rigelj Formation is erosively overlain by the Tarvis Breccia. The stronger diversification of the sedimentary environments within the Karavanke-Carnic Alps in the Lower Permian after the uniform sedimentation in the Upper Carboniferous can be attributed to block-faulting.
Ključne besede: Lower Permian, Southern Alps, Dovžanova soteska, Mt. Pleschiwetz / Plešivec, Clastic Trogkofel Beds, fusulinid biostratigraphy
Objavljeno v DiRROS: 25.08.2022; Ogledov: 510; Prenosov: 146
.pdf Celotno besedilo (3,45 MB)

New data on lower Permian rugose corals from the Southern Karavanke Mountains (Slovenia)
Olga L. Kossovaya, Matevž Novak, Dieter Weyer, izvirni znanstveni članek

Povzetek: Studies of upper Palaeozoic corals from the Southern Alps (Karavanke Mountains in Slovenia and Carnic Alps along the Austrian/Italian border) started at the end of the 19th century. Since the mid-20th century, corals of the Karavanke Mountains have been studied in detail by several authors. Recently, several coral type localities and the coral groups occurring therein have been einvestigated. This paper deals in particular with the study of Carinthiaphyllum Heritsch, 1936 and all previously known data have been revised within this study. Most specimens of Carinthiaphyllum originate from museum collections and from new findings in the Dovžanova Soteska area of northern Slovenia. Additional material is represented by newly found samples from the locality of Mt. Boč in eastern Slovenia. The stratigraphic position and age of the Carinthiaphyllum occurrences are determined by fusulinid and conodont assemblages. Two species, Carinthiaphyllum crasseseptatum Gräf & Ramovš, 1965 and C. ramovsi n. sp., are described herein. New morphological features, including root-like protrusions and connecting stereoplasmic tubes, have been found for the first time in gregaria growth mode. Therefore, these new observations provide evidence of a solitary gregaria growth mode: individuals are invariably separated with contact and reciprocal support only by root-like, sometimes channeled tubes occurring as outgrowths of the archaeothecal wall. An emended diagnosis of Carinthiaphyllum is proposed herein. The studied collection is housed in the Museum für Naturkunde (Leibniz-Institut) at the Humboldt University in Berlin.
Ključne besede: Gregaria corals, Carinthiaphyllum, Asselian-Sakmarian, Southern Alps
Objavljeno v DiRROS: 04.03.2022; Ogledov: 553; Prenosov: 212
.pdf Celotno besedilo (7,42 MB)

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