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 terrigenous origin, contain no admixture of volcanic material and were enriched in potassium during diagenesis. The SiO2 content 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 the possible setting of these late diagenetic processes.
COBISS.SI-ID: 1085022
Soil samples were collected in the broader area (app. 800 by 500 m) around ancient ironworks that stopped operating at the end of the 19th century. Elevated concentrations of heavy metals were detected only in a restricted area around iron foundry. While Cd and Pb indicate areal load of heavy metals in soil, concentrations of As, Cu, Hg and Zn are typical of point pollution sources, where the officially allowed limit and warning values are exceeded. The most significant threat to the environment are therefore sources of point pollution (tailing locations) in the ironworks area.
COBISS.SI-ID: 2227797
A global radiolarian dataset of 167 Pliensbachian and Toarcian species was analysed. An extinction interval was recognized through the Late Pliensbachian and Early Toarcian. The predominance of extinctions over originations was caused by a series of climate and environmental changes related to intensified magmatic activity. The diversity trends were in line with other marine faunas (ammonites and also benthos) but opposed to phytoplankton. A distinct provincialism between low-latitude and mid- to high-latitude assemblages has been established. The paper is the first report on the global response of radiolarian faunas to the environmental deterioration around the Pliensbachian−Toarcian boundary, and will be of interest to the broader research community focusing on this and other extinction intervals.
COBISS.SI-ID: 35815213