| Title: | A stratigraphic gap within the Toarcian to Tithonian succession of the Slovenian Basin in the Kneža Valley (Julian Alps, NW Slovenia) |
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| Authors: | ID Rožič, Boštjan (Author)
ID Smerkolj, Simon (Author)
ID Peternel, Tina (Author)
ID Gale, Luka (Author) |
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| Files: |  PDF - Presentation file, download (16,20 MB)
MD5: 8A83D50D1859DE9F5F89881AEF58A5F0
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  GeoZS - Geological Survey of Slovenia
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| Abstract: | The Slovenian Basin was the largest Mesozoic inter-platform deeper-marine palaeogeographic unit of the transitional zone between the present-day Southern Alps and the Dinarides. In this study, we present the sedimentology and biostratigraphy of the Toarcian to Tithonian succession of the last unstudied large outcrop belt of the Slovenian Basin Jurassic rocks, which occurs in the Kneža Valley in the foothills of the Julian Alps in NW Slovenia. The studied succession is typical of the southern part of the Slovenian Basin preserved in the Podmelec Nappe, the lowest thrust unit of the eastern segment of the Southern Alps. In two detailed sections, we logged the hemipelagic limestones of the uppermost Krikov Formation, the clay-rich Toarcian Perbla Formation, siliceous pelagites, and resedimented limestones of the Aalenian to Lower Tithonian Tolmin Formation, and calpionellid-bearing Upper Tithonian to Lower Berriasian Biancone Limestone Formation. The thickness of the Perbla Formation follows the eastward thickening trend typical of the successions along the southern part of the basin. The Tolmin Formation shows a high abundance of resedimented limestones, which is also in accordance with the previously established northward waning of resediments within the entire basin. A distinctive feature of the Kneža Valley succession is the unusually small thickness of the radiolarian cherts of the Tolmin Formation (its Upper Member). This indicates a stratigraphic gap, which is related to the Bajocian-Bathonian collapses of the basin’s southern slopes and the margin of the Adriatic Carbonate Platform. |
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| Keywords: | Slovenian Basin, Middle-Upper Jurassic stratigraphic gap, Southern Alps, Perbla Formation, Tolmin Formation, Kneža Valley |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 07.04.2026 |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 35-54 |
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| Numbering: | vol. 69, no. 1 |
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| UDC: | 551.1/.4 |
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| ISSN on article: | 0016-7789 |
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| DOI: | 10.5474/geologija.2026.002  |
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| COBISS.SI-ID: | 283520259 |
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| Note: |
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| Publication date in DiRROS: | 06.07.2026 |
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| Views: | 114 |
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| Downloads: | 54 |
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