20.500.12556/DiRROS-24865 Mesozoic stratigraphy of Dinaric successions at the Dinarides – Southern Alps boundary, Sava Folds region, Slovenia Stratigrafija dinarskih mezozojskih zaporedij na meji med Dinaridi in Južnimi Alpami, območje Posavskih gub, Slovenija In central Slovenia, on the border between Southern Alpine derived units and Dinaric units in the northern part of the Sava Folds, detailed field observations and reambulation-type mapping were conducted. The research aimed to clarify the distribution of Mesozoic formations and the palaeogeographical and tectonic position of the studied area. Based on field observations, lithofacies, microfacies, and biostratigraphic studies (including benthos and planktonic foraminifers, dinocysts, acritarchs, chitinoidellids, calpionellids, green algae, microproblematica, calcareous nannofossils and ascidians), the following successions characterize the northern limb of the Trojane Anticline and the Tuhinj–Motnik Syncline: upper Anisian to lowermost Ladinian platform carbonates (Mendole Formation) are overlain by Ladinian siliciclastic successions including volcanoclastic resediments (Pseudozilian Formation). These either interfinger or are overlain by the Ladinian to lower Carnian platform limestone (Schlern Formation); in the upper part of this formation, the deep–marine siliciclastics and/or carbonates are locally intercalated. Following a significant stratigraphic gap, the lower Tithonian to lower Valanginian pelagic limestone and carbonate resediments (Biancone Formation s.l.) were deposited. The Biancone limestone is covered by upper Aptian–upper Albian (Cenomanian?) marlstone with occasional calcarenite (calciturbidite) interlayers (Lower Flyschoid/Gora Formation). The succession ends with Upper Cretaceous pelagic and resedimented limestones (Volče/Krško Formation). The age and spatial distribution of these successions often differ from that depicted on the existing geological maps. This succession resembles the Transition Zone between the External and Internal Dinarides. Our study indicates the presence of similar transitional Mesozoic Dinaric successions north of the previously proposed Southern Alpine thrust front. V severnem delu Posavskih gub osrednje Slovenije, na meji med južnoalpskimi in dinarskimi enotami, je bila izdelana stratigrafska reambulacija z namenom dopolnitve razumevanja paleogeografskega in tektonskega razvoja raziskanega območja. Na podlagi natančnih in dobro dokumentiranih terenskih opazovanj, litofaciesov, mikrofaciesov in biostratigrafije (vključno z bentoškimi in planktonskimi foraminiferami, dinocistami, akritarhi, hitinolidelidi, kalpionelami, zelenimi algami, različno mikroproblematiko in kalcitnim nanoplanktonom) je bil proučen naslednji razvoj Trojanske antiklinale in Tuhinjsko–Motniške sinklinale: zgornjeanizijski do spodnjeladinijski platformni apnenci (Mendolska formacija), katere prekriva ladinijsko siliciklastično zaporedje s presedimentiranimi vulkaniti (Psevdoziljska formacija), še višje pa ladinijski do spodnjekarnijski platformni apnenci in dolomiti (Schlernska formacija), ki se lahko v zgornjem delu formacije prepletajo z globljemorskimi siliciklastičnimi in/ali apnenčastimi vključki. Po dolgi stratigrafski vrzeli sledijo spodnjetithonijski do spodnjevalanginijski pelagični apnenci z redkejšimi plastmi presedimentiranih apnencev (Biancone formacija s.l.). Biancone apnenec prekriva zaporedje laporovcev in kalkarenitov (kalciturbiditov) zgornjeaptijske do zgornjealbijske (?cenomanijske) starosti (Spodnja flišoidna/Gora formacija). Zaporedje se konča z zgornjekrednimi pelagičnimi in presedimentiranimi apnenci (Volčanski apnenec/Krška formacija). Starosti in prostorsko razširjanje navedenih formacij se pogosto razlikujeta od tistih, prikazanih na obstoječih geoloških kartah. Ta zaporedja so primerljiva zaporedjem Prehodne cone med Notranjimi in Zunanjimi Dinaridi. V tem prispevku so prvič objavljeni dokazi za obstoj dinarskih razvojev severno od predhodno predlagane Južnoalpske narivne meje. Tovrstne odnose med mezozojskimi paleogeografskimi in recentnimi geotektonskimi enotami je možno razložiti s kompleksnim terciarnim tektonskih razvojem širšega ozemlja. Triassic Jurassic Cretaceous Aptian–Albian calpionellids Dinarides Southern Alps Sava Folds trias jura kreda aptijsko-albijske kalpionelide Dinaridi Južne Alpe Posavske gube true false true Geološki zavod Slovenije Angleški jezik Slovenski jezik Neznano 2025-12-23 03:58:46 2025-12-23 10:03:17 2025-12-24 04:01:11 0000-00-00 00:00:00 2025 0 0 str. 147-200 no. 2 vol. 68 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-08-29 551.7 0016-7789 10.5474/geologija.2025.007 261783299 1931-Article_Text-12342667-2-10-20251210.pdf 1931-Article_Text-12342667-2-10-20251210.pdf 1 F587107CA70FC66D070B5D8B390D6248 65fa384e798024cb3b7e8ccf035b5672336de8a4415234ef06057cb0c0ee9400 79486b7a-dfde-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37209 1931-Article_Text-12342712-1-10-20251210.xlsx 1931-Article_Text-12342712-1-10-20251210.xlsx 1 5AB8AA7471C98052A00AC5A218AF8B00 c7eb9490a598413fa9e0533ba3538d53bcea59e4644a4992935fa35e07981b3d b69f99f0-dfe0-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37219 1931-Article_Text-12342710-1-10-20251210.pdf 1931-Article_Text-12342710-1-10-20251210.pdf 1 E46870DC41513C75B069F1B81E97B092 5ccd1701c95d91375d572b6213089bf2a0cbd0a849ca0622412a294448523b41 3ed3c8e4-dfe0-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37216 1931-Article_Text-12342713-1-10-20251210.xlsx 1931-Article_Text-12342713-1-10-20251210.xlsx 1 DE917518856C368AD041218ABAE1F4FC 3a678dde5ecc6c2530e1f2f9d742ad96fbda7bcd88888857c1f1e108b2691b78 50026181-dfe0-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37217 Geološki zavod Slovenije Geologija 0 0 0