The Carnian-Rhaetian genus Miliolipora (Soritoidea, Milioliporidae) is characterised by a coarsely perforated porcelaneous wall and a quinqueloculinoid arrangement of semi-tubular chambers. ...Miliolipora tamarae nov. sp. has been documented in the Rhaetian Dachstein reef limestone of Mt. Begunjščica (Karavanke Mts., northern Slovenia). This new species differs from Miliolipora cuvillieri Brönnimann and Zaninetti in its costate outer chambers and evolute coiling. Both species are abundant in an oncoid rudstone/grapestone facies located immediately behind the central reef zone. In this depositional context, Miliolipora spp. were subjected to mechanical sorting and are believed to have been transported a short distance from their habitat. The costae and the overall less rounded shape of the test helped to stabilize M. tamarae nov. sp. on the sea floor. Both species were widely spread in the Tethyan realm confirming the broad palaeobiogeographic distribution of the Late Triassic foraminifera.
Le genre Miliolipora (Soritoidea, Milioliporidae) du Carnien-Rhétien est caractérisé par un test porcelané grossièrement perforé et par un arrangement pseudoquinqueloculin des loges semi-tubulaires de type quinqueloculin. Miliolipora tamarae nov. sp. se trouve dans le calcaire récifal du Dachstein (Rhétien) du Mont Begunjščica (Karawanken, Slovénie septentrionale), où elle est associée à de nombreux spécimens de Miliolipora cuvillieri Brönnimann et Zaninetti. Cette nouvelle espèce diffère de M. cuvillieri par la présence de costae sur les loges externes et par l’enroulement évolute du test. Les deux espèces sont abondantes dans les microfaciès de rudstones oncolithique/grapestones situés juste derrière la zone centrale du récif. Dans ce type de dépôt, les Miliolipora spp. ont été soumises à un tri mécanique et transportées sur une faible distance depuis leur habitat. Les costae et la forme générale du test, moins arrondie, assurent probablement une meilleure stabilisation de M. tamarae nov. sp. sur le fond marin. Les deux espèces sont largement répandues dans le domaine Téthysien, confirmant ainsi la large distribution biogéographique des foraminifères du Trias supérieur.
Diverse and well-preserved Toarcian radiolarians have been recovered from a succession of organic-rich shale with intercalations of siliceous limestone. The succession is located at the ...Slovenian–Italian border in the Julian Alps and was deposited on a subsided block pertaining to the south Tethyan passive continental margin. Twenty spumellarian and 17 nassellarian genera were found in total. Thirty-six taxa were identified to species level and one new species,
Bistarkum mangartense n. sp., is described. The assemblages show a high predominance of spumellarians over nassellarians. Spongy spumellarians, especially
Orbiculiforma ?, are markedly abundant. Pantanelliidae are generally rare but reach a pronounced peak of 13% in one stratigraphic level. Among nassellarians,
Parahsuum is the most abundant but members belonging to Syringocapsidae are scarce to absent. In addition to paleolatitude and water column depth, ecological conditions accompanying the early Toarcian global anoxic event may have to a considerable extent determined the specific taxonomic composition of these radiolarian faunas.
An Upper Ladinian to Lower Carnian succession in the Idrija-Cerkno region (W Slovenia) is described and correlated with similar successions in the Dolomites. Structurally, the area belongs to the ...Rodne unit (Trnovo nappe, NW Dinarides). The succession was reconstructed from three stratigraphically superimposed sections. The Orehovska Grapa section is characterised by finegrained turbidites composed of sandy mudstones with intercalations of lenses and beds of trachy-andesite tuff and resedimented tuffs. Beds of hemipelagic light grey wackestone are rarely interstratified. These rocks are correlative with the Upper Ladinian Wengen Group. The Police1 section is composed of black shaly marls and mudstones, hemipelagic wackestone, tuffaceous sand-stones, and in the upper part, of calciturbidites overlain by black laminated shales. The section is correlated with the lower part of the San Cassiano Formation. The Police 2 section consists mainly of wavy bedded peloidal and bioclastic limestone, alternating with thin interbeds of shaly mudstones and marls. The limestone and mudstones are interpreted as tempestites and gradually pass into bedded and massive dolomite of Early Carnian age. This succession is similar to the transition from the San Cassiano Formation to the Cassian Dolomite. The studied succession represents a shallowing upward basinal sequence capped by carbonate platform deposits. Palaeogeographically it is a Late Ladinian transition from the carbonate platform in the south to the typical basinal area in the north.PUBLICATION ABSTRACT
A detailed stratigraphy of Jurassic and Cretaceous deep-water sediments in the Julian Alps is presented. The study areas are located at Mt. Mangart, in the Triglav Lakes Valley and in the broader ...surroundings of Bovec. The successions are paleogeographically attributed to the Bovec Basin and the Julian High, and correlated with similar successions elsewhere in the Southern Alps. The sedimentary evolution is reconstructed and discussed in relation to synsedimentary tectonics, eustatic sea-level fluctuations and global paleoceanographic changes. The monograph is a fundamental publication for stratigraphy and sedimentology of Jurassic and Cretaceous deposits in the Julian Alps.
Mass movements represent important processes that shape relief in Alpine areas. In this article, we present the spatio-temporal dynamics of the Ciprnik landslide (Julian Alps, NW Slovenia) and ...interpret its triggering and evolution. In the study area, mass movement activity is characterised by two phases: normal deposition on the fluvial fans that dominated up to 2000, and a more active phase related to the triggering of the Ciprnik complex landslide and formation of an additional debris-flow fan. The Ciprnik landslide started as a translational movement over the discontinuity plane that was mobilised into a debris-flow. The triggering and slope failure resulted from a combination of tectonics (i.e. dip-slope position of the strata, and strong fracturing), lithology (alternation of thin beds of carbonates and fine-grained clastics), and accumulation of precipitation. The debris-flow fan remains active and interfingers with adjacent active fluvial fans.
Dolina Triglavskih jezer Brancelj, Anton; Dakskobler, Igor; Erhartič, Bojan ...
Geografija Slovenije,
2015
eBook
Odprti dostop
In 1924, the Triglav Lakes Valley was designated a protected area, which is today part of the central area of extensive Triglav National Park. The lakes give a special character to the valley, which ...also stands out for its other natural features. In terms of nonliving nature, this volume presents some of the valley’s geological, geomorphological, and hydrological characteristics, and, in terms of living nature, it presents its vegetation, focusing on botanical characteristics and forest. The volume also discusses the human presence and its impact on the appearance of the landscape.
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