Triassic reefs in Slovenia

Buser, Stanko; Ramovš, Anton; Turnšek, Dragica

doi:10.1007/bf02536675

Cited by 30 publications

(17 citation statements)

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“…The Dachstein-type reef-rims around neighbouring platforms (Buser et al 1982;Turnšek & Buser 1991) also imply good water circulation (Iannace & Zamparelli 2002). The above mentioned data, as well as the long-term existence of the Slovenian Basin are in contrast to the shallower, more restricted intraplatform basins (see for example Cozzi & Podda 1998;Iannece & Zamparelli 2002;Tomašových 2004).…”

Section: Depositional Environmentmentioning

confidence: 96%

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Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)

Gale¹

2010

Geologica Carpathica

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Abstract:The Slovenian Basin represents a Mesozoic deep-water sedimentary environment, situated on the southern Tethyan passive margin. Little is known about its earliest history, from the initial opening in the Carnian (probably Ladinian) to a marked deepening at the beginning of the Jurassic. The bulk of the sediment deposited during this period is represented by the Norian-Rhaetian "Bača Dolomite", which has, until now, been poorly investigated due to a latediagenetic dolomitization. The Mount Slatnik section (south-eastern Julian Alps, western Slovenia) is one of a few sections where the dolomitization was incomplete. Detailed analysis of this section allowed us to recognize eight microfacies (MF): MF 1 (calcilutite), MF 2 (pelagic bivalve-radiolarian floatstone/wackestone to rudstone/packstone), MF 3 (dolomitized mudstone) with sub-types MF 3-LamB and MF 3-LamD (laminated mudstone found in a breccia matrix and laminated mudstone found in thin-bedded dolomites, respectively) and MF 3-Mix (mixed mudstone), MF 4 (bioturbated radiolarian-spiculite wackestone), MF 5 (fine peloidal-bioclastic packstone), MF 6 (very fine peloidal packstone), MF 7 (bioclastic wackestone) and MF 8 (crystalline dolomite). The microfacies and facies associations indicate a carbonate slope apron depositional environment with hemipelagic sedimentation punctuated by depositions from turbidites and slumps. In addition to the sedimentary environment, two "retrogradation-progradation" cycles were recognized, each with a shift of the depositional setting from an inner apron to a basin plain environment.

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Section: Depositional Environmentmentioning

confidence: 96%

“…Several reefs are indeed known to have rimmed the Julian Carbonate Platform (Buser et al 1982;Turnšek & Buser 1991). Intraclasts, on the contrary, originate very close to the place of final deposition.…”

Section: Submicrofacies Mf 3-mix (Mixed Mudstone)mentioning

confidence: 99%

Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)

Gale¹

2010

Geologica Carpathica

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“…a The 1:5000 map of the study area (this work); only stratigraphic levels with isolated limestone blocks are shown. b Geological map of the wider area (Modified after Buser et al 1982;Buser 1986b) Pseudozilian (Pseudogailtal) beds from younger (presumably Carnian) Amphiclina beds Buser 1986a). The Amphiclina beds sensu Buser (1986a) reach a thickness of approximately 450 m. In the upper part, they comprise intercalating black shale and bedded micritic limestone of Tuvalian age (Flügel and Ramovš 1970;Buser and Krivic 1979;Kolar-Jurkovšek 1982;Buser et al 2008), which gradually passes into Norian-Rhaetian bedded dolomite with chert (Bača dolomite; Kossmat 1914; Buser (Šmuc and Čar 2002; Čar 2010).…”

Section: Geological Settingmentioning

confidence: 99%

“…Although Kossmat (1913), by noting the similarity of the Cerkno limestone blocks with the "Cipit Limestone" from the Dolomites area, indirectly suggested these are carbonate olistoliths deposited within basinal clastics, later interpretations indicated in situ formed reefs (Čar et al 1981;Buser et al 1982;Turnšek et al 1982Turnšek et al , 1984. The latter interpretation is still considered to be valid (Flügel 2002).…”

mentioning

confidence: 99%

Carnian reefal blocks in the Slovenian Basin, eastern Southern Alps

Gale

Skaberne

Peybernes

et al. 2016

Facies

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The Carnian Amphiclina beds of the eastern Southern Alps mostly consist of shale and sandstone deposited in the deep-marine Slovenian Basin, which was located near the western margin of the Meliata Ocean. In the vicinity of Cerkno (Slovenia), blocks of massive or crudely bedded limestone crop out within a succession of clastic rocks that are several hundred meters thick. Sponge-microbialite boundstone and coral pillarstone are the predominant facies within these blocks. Oncoid floatstone-rudstone and moderately sorted peloid packstone form crudely layered parts of the blocks, whereas intraclast-cortoid packstone and poorly sorted peloid packstone occur locally in cross-stratified thin beds, truncated at block margins. Detailed mapping further shows that limestone blocks form units at discrete stratigraphic levels within shale and that these units are variable in thickness. Whereas the largest blocks mostly lie concordant to the bedding, smaller blocks are poorly sorted and randomly oriented. All of this evidence suggests that the limestone blocks are olistoliths, derived from an outer platform margin and/or uppermost slope

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“…The whole Lower Triassic stratigraphic sequence can reach the thickness of 500 meters (buSer, 1979a;Dozet & buSer, 2009). The Lower Triassic clastic rocks are absent only in the topmost part of the considered sequence, where marlstone and limestone thoroughly predominate.…”

Section: Lower Triassicmentioning

confidence: 99%

Younger Paleozoic, Mesozoic and Tertiary oolitic and oncolitic beds in Slovenia – An Overview

Dozet¹,

Ogorelec²

2012

Geologija

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Oolitic and oncoidal rocks, microfacies, depositional environments and their stratigraphic ranges in Slovenia are subjects of this article. Various types of calcareous ooids are present in the Upper Carboniferous, Permian and Tertiary (Paleocene and Miocene) beds and specially at many levels in an up to 6000 meters thick statigraphic succession of the Mesozoic age. Sedimentological investigations have been carried out specially in the Triassic and Jurassic beds. The ooids occurring in the shallow-water and intertidal carbonate environment have been grouped into seven types and oncoids into four types. Oncoids are rather more aboundant in Carnian and Norian/Rhaetian age. Late dolomitization of some oolitic beds is next to cementation the main diagenetic feature. Izvle~ekPredmet preglednega ~lanka so oolitne in onkoidne plasti, mikrofacies, okolje nastanka ter njihova stratigrafska raz{irjenost v Sloveniji. Razli~ne vrste apnen~evih ooidov najdemo v plasteh zgornjekarbonske, permske in terciarne (paleocen in miocen) starosti, posebej pestro pa so zastopane v ve~ stratigrafskih nivojih mezozojskega obdobja, ki lahko doseže debelino tudi do 6000 metrov. Sedimentolo{ko so bile v ta namen raziskane predvsem triasne in jurske plasti. Ooide, ki so nastajali v razli~nih okoljih plitvomorskega in medplimskega karbonatnega okolja, lahko razvrstimo v sedem skupin, onkoide pa v {tiri skupine. Onkoidi so nekoliko pogostej{i v karnijskem in norijsko/ retijskem obdobju. Ponekod je tako oolitne kot onkoidne plasti zajela poznodiagenetska dolomitizacija.

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Triassic reefs in Slovenia

Cited by 30 publications

References 0 publications

Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)

Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)

Carnian reefal blocks in the Slovenian Basin, eastern Southern Alps

Younger Paleozoic, Mesozoic and Tertiary oolitic and oncolitic beds in Slovenia – An Overview

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