scholarly journals Tidal deposits in the Early Miocene Central Paratethys: the Vučji Jarek and Čemernica members of the Macelj formation (NW Croatia)

2021 ◽  
Vol 74 (1) ◽  
pp. 41-56
Author(s):  
Radovan Avanić ◽  
◽  
Davor Pavelić ◽  
Zoltan Pécskay ◽  
Mirjana Miknić ◽  
...  
Keyword(s):  
Transition Zone ◽  
Marginal Zone ◽  
Early Miocene ◽  
Central Paratethys ◽  
Tidal Influence ◽  
Lithostratigraphic Unit ◽  
Lithostratigraphic Units ◽  
Geologic Map ◽  
Tidal Deposits ◽  
The Republic

The Macelj formation is an informal Eggenburgian-early Ottnangian lithostratigraphic unit that is established in the area of the Hrvatsko Zagorje Basin, which represented a marginal zone of the Early Miocene Central Paratethys Sea. Modern studies, as a part of the Geologic Map of the Republic of Croatia 1:50 000 project, yielded new data that improves the knowledge of the depositional and stratigraphic characteristics of the formation. The sedimentological research within this study was focused on the two older lithostratigraphic units of the Macelj formation: the Vučji Jarek member and the Čemernica member. The Vučji Jarek mb. is represented by three facies. The Facies of horizontally bedded sandstones is characterized by mostly medium-grained, moderately sorted sandstones that reflect deposition on the foreshore to the upper shoreface. The facies of horizontally and cross-bedded glauconitic sandstones is composed of fine- to coarsegrained, well-sorted sandstones that indicate foreshore to shoreface deposition under tidal influence. The Facies of horizontally and cross-bedded pyroclastics consists of tuff, pumice, lapilli and large blocks, showing a chaotic structure in places. Deposition occurred at the shoreface under tidal influence. The Čemernica mb. is represented by the Facies of structureless clayey-silty sands that are poorly sorted and bioturbated, and indicates deposition below the fairweather wavebase, in the offshore-transition zone. Deposits of the members include marine macro- and microfossil associations. K-Ar dating of separated glauconite mineral fractions yielded an early Eggenburgian age for the Vučji Jarek mb. glauconitic sandstones (19.2±0.64 Ma) which is in accordance with biostratigraphical analyses. Sedimentological characteristics of the Eggenburgian Macelj fm., especially those that reflect the tidal influence, fit the general characteristics of the Central Paratethys Sea in the Early Miocene.

scholarly journals The distribution of <i>Triebelina raripila</i> and <i>Carinocythereis carinata</i> (Ostracoda) from the Middle Miocene of the Central Paratethys and their palaeogeographic implications

1998 ◽  
Vol 17 (2) ◽  
pp. 125-130 ◽  
Author(s):  
J. Szczechura
Keyword(s):  
Shallow Water ◽  
Late Miocene ◽  
Middle Miocene ◽  
Early Miocene ◽  
Central Paratethys ◽  
Eastern Paratethys ◽  
Main Species ◽  
Late Middle Miocene ◽  
The Mediterranean

Abstract. Late Middle Miocene (Upper Badenian) strata of the Fore-Carpathian Depression of Poland yield a shallow-water ostracod fauna which contains the species Triebelina raripila (G. W. Müller, 1894) and Carinocythereis carinata (Roemer, 1838). The palaeobiogeographic distribution of the two main species suggests, that in the late Middle Miocene, Central Paratethys was still connected to the Mediterranean, although still separated from the Eastern Paratethys and from southeastern Eurasia. The continuous occurrence of Triebelina raripila and Carinocythereis carinata in the Mediterranean basins, from the Early Miocene to Recent, indicates that marine conditions existed throughout, thereby allowing them to survive the Late Miocene salinity crisis.

scholarly journals A late Burdigalian bathyal mollusc fauna from the Vienna Basin (Slovakia)

2011 ◽  
Vol 62 (3) ◽  
pp. 211-231 ◽  
Author(s):  
Mathias Harzhauser ◽  
Oleg Mandic ◽  
Jan Schlögl
Keyword(s):  
New Species ◽  
Deep Water ◽  
Middle Miocene ◽  
Mediterranean Area ◽  
First Record ◽  
Early Miocene ◽  
Vienna Basin ◽  
Poor Knowledge ◽  
Central Paratethys ◽  
Aquitaine Basin

A late Burdigalian bathyal mollusc fauna from the Vienna Basin (Slovakia)This is the first record of a bathyal mollusc fauna from the late Early Miocene of the Central Paratethys. The assemblage shows clear affinities to coeval faunas of the Turin Hills in the Mediterranean area and the Aquitaine Basin in France. The overall biostratigraphic value of the assemblage is hard to estimate due to the general very poor knowledge of Miocene bathyal faunas. Several species, however, are known from deep water deposits of the Middle Miocene Badenian stage as well. This implies Early Miocene roots of parts of the Middle Miocene deep water fauna and suggests a low turnover for bathyal mollusc communities at the Early-Middle Miocene boundary. The nassariid gastropodNassarius janschloegliHarzhauser nov. sp. and the naticid gastropodPolinices cerovaensisHarzhauser nov. sp. are introduced as new species.

scholarly journals Precambrian metamorphites as part of the petrographic diversity of Rila Geopark

2021 ◽  
Vol 82 (1) ◽  
pp. 11-29
Author(s):  
Dimitar Sinnyovsky
Keyword(s):  
Popular Science ◽  
Metamorphic Rocks ◽  
Historical Overview ◽  
Geological Processes ◽  
Lithostratigraphic Units ◽  
Intrusive Rocks ◽  
Geological Information ◽  
Geological Map ◽  
The Republic ◽  
Popular Language

The petrographic diversity of Rila Mountain is an important prerequisite for the development of Rila Geopark and its nomination for UNESCO Geopark. According to the principle of the thematic geodiversity, the leading theme of the geopark – glacial landscapes, is complemented by the remarkable petrographic diversity of igneous and metamorphic rocks, in which alpine glacial forms are developed. Following a recent review of the intrusive rocks that make up the Rila-West Rhodope Batholith, the concept of Rila Geopark would not be complete without a retrospective of the metamorphic rocks that are an integral part of its petrographic diversity. The different approaches (lithodemic and lithotectonic) to the mapping of the Rila-Rhodope Massif divided the geologists into two camps. This led to a discrepancy in terminology and nomenclature of the metamorphic units, which is unacceptable in the context of the educational priority of the geopark. For the purpose of geotourism, clear and understandable interpretations are required to provoke the visitors’ interest in geological processes and phenomena, rather than confusion and perplexity. This article is a historical overview of the geological study of the metamorphic terrains in Rila Mountain with a scheme of lithodemic units based on the existing lithostratigraphic nomenclature. This approach allows the preservation of the names of the lithostratigraphic units, whose toponymic adjectives derive from well known geographical features in the Rila-Rhodope Massif. The rank term is replaced by a lithological or descriptive term, which frees the nomenclature from the dogmatic restrictions of the stratigraphic code and reduces the distance between the strictly scientific and popular science approach used for interpretation of geological information in a popular language accessible to the general public. This methodology is consistent with the approach recommended for mapping of non-stratified bodies on the Geological Map of the Republic of Bulgaria at a scale 1:50 000.

Oceanographic conditions as a trigger for the formation of an Early Miocene (Aquitanian) Konservat-Lagerstätte in the Central Paratethys Sea

2010 ◽  
Vol 292 (3-4) ◽  
pp. 425-442 ◽  
Author(s):  
Patrick Grunert ◽  
Mathias Harzhauser ◽  
Fred Rögl ◽  
Reinhard Sachsenhofer ◽  
Reinhard Gratzer ◽  
...  
Keyword(s):  
Early Miocene ◽  
Central Paratethys ◽  
Oceanographic Conditions
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