Red nodular limestone overlying platform carbonates was dated to the Illyrian Trinodosus Ammonoid Zone with radiolarians and conodonts. Volcanics, carbonate megabreccias, resedimented limestones and marls, and finally platform limestone, follow upsection. Map-scale geometry of the basin-fill, lateral and vertical variations in facies types and thickness, and actually preserved paleo-escarpments provide evidence of synsedimentary block faulting and formation of small-scale, relatively shallow half-grabens. This research provides new important insights into Upper Anisian–Ladinian stratigraphy and the extensional event of the easternmost part of the Southern Alps and unravels the complex small-scale tilt-block topography genetically connected with the formation of other deep-water basins that resulted from the Middle Triassic rifting of the Neotethyan margin.
COBISS.SI-ID: 2081109
Facies, mineralogical and chemical analyses of Jurassic bedded cherts and intercalated shales from SE Slovenia show that the shales are of terrigeneous origin, contain no admixture of volcaniclastic material and were enriched in potassium during diagenesis. The proportion of silica in cherts is )90%. The sediments were originally silica-rich carbonate beds intercalated with mud. During late diagenesis, the mixing of marine and meteoric waters caused further silicification of limestone and simultaneous potassium enrichment of shale. Coastal areas of the western Central Paratethys in the Middle Miocene were a possible setting of these late diagenetic processes.
COBISS.SI-ID: 1085022