Unusual microfacies character of the Pieniny Limestone in the Orava sector of the Pieniny Klippen Belt

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F22%3A10250708" target="_blank" >RIV/61989100:27350/22:10250708 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.geopaleo.fns.uniba.sk/ageos/articles/download.php?yr=2022&volume=14&issue=1" target="_blank" >http://www.geopaleo.fns.uniba.sk/ageos/articles/download.php?yr=2022&volume=14&issue=1</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Unusual microfacies character of the Pieniny Limestone in the Orava sector of the Pieniny Klippen Belt

Popis výsledku v původním jazyce

The Pieniny Limestone Formation is a significant formation representing the pelagic sedimentation during the Late Jurassic to Early Cretaceous in numerous units of the Pieniny Klippen Belt. On the hills over Revišné, in the Orava sector of the Pieniny Klippen Belt, a distinctive klippe was sampled and biostratigraphically analysed in detail. The klippe consists of the &quot;biancone&quot;-type limestones of Early Tithonian to Late Valanginian age. The age range was determined by calcareous dinoflagellates, radiolarians, and aptychi. The section is remarkable by mostly radiolarian and radiolarian-spiculitic microfacies that prevail through the entire Revišné 1 section; the calpionellid to calpionellid-radiolarian microfacies, which typically occurs in the &quot;biancone&quot; facies of the Oravic successions is surprisingly lacking. The samples contain only very rare calpionellids and no calpionellid zones or subzones could be determined. Moreover, probably due to a tectonic reduction, there is a missing interval encompassing microfossil zones of the Lower Tithonian and Lower Beriassian (the calcareous dinoflagellate zones Tenuis, Fortis, Proxima, Fusca, Waneri and Minuta are absent). Lower Tithonian was determined solely based on dinoflagellate cysts, proving Tithonica and Malmica zones. Younger part of the section, just above the discontinuity, was dated to the Upper Berriasian (Vogleri Zone) by the onset of Colomisphaera vogleri and Stomiosphaera wanneri. Lower Valanginian (Valanginiana Zone) was determined by the occurrence of Colomisphaera lucida, Colomisphaera heliosphaera, Carpistomiosphaera valanginiana and Stomiosphaera echinata. Apart from dinoflagellates, the Late Valanginian age of the youngest layers was also proved by lamellaptychi. Predominance of radiolarians (approximately 30-40% in all thin sections), missing calpionellids, and conformable lithology and microfacies suggest that the studied beds sedimented in the deepest parts of the basin with relatively stable conditions. The lack of dinocyst and calpionellid zones in the lower part of the section is interpreted by a tectonic reduction of the sediments, resulting from a younger local tectonic event. The specific character of the described limestones reflects microfacies variability of the Pieniny Limestone Formation in the Oravic successions. (C) 2022 Comenius University. All rights reserved.

Název v anglickém jazyce

Unusual microfacies character of the Pieniny Limestone in the Orava sector of the Pieniny Klippen Belt

Popis výsledku anglicky

The Pieniny Limestone Formation is a significant formation representing the pelagic sedimentation during the Late Jurassic to Early Cretaceous in numerous units of the Pieniny Klippen Belt. On the hills over Revišné, in the Orava sector of the Pieniny Klippen Belt, a distinctive klippe was sampled and biostratigraphically analysed in detail. The klippe consists of the &quot;biancone&quot;-type limestones of Early Tithonian to Late Valanginian age. The age range was determined by calcareous dinoflagellates, radiolarians, and aptychi. The section is remarkable by mostly radiolarian and radiolarian-spiculitic microfacies that prevail through the entire Revišné 1 section; the calpionellid to calpionellid-radiolarian microfacies, which typically occurs in the &quot;biancone&quot; facies of the Oravic successions is surprisingly lacking. The samples contain only very rare calpionellids and no calpionellid zones or subzones could be determined. Moreover, probably due to a tectonic reduction, there is a missing interval encompassing microfossil zones of the Lower Tithonian and Lower Beriassian (the calcareous dinoflagellate zones Tenuis, Fortis, Proxima, Fusca, Waneri and Minuta are absent). Lower Tithonian was determined solely based on dinoflagellate cysts, proving Tithonica and Malmica zones. Younger part of the section, just above the discontinuity, was dated to the Upper Berriasian (Vogleri Zone) by the onset of Colomisphaera vogleri and Stomiosphaera wanneri. Lower Valanginian (Valanginiana Zone) was determined by the occurrence of Colomisphaera lucida, Colomisphaera heliosphaera, Carpistomiosphaera valanginiana and Stomiosphaera echinata. Apart from dinoflagellates, the Late Valanginian age of the youngest layers was also proved by lamellaptychi. Predominance of radiolarians (approximately 30-40% in all thin sections), missing calpionellids, and conformable lithology and microfacies suggest that the studied beds sedimented in the deepest parts of the basin with relatively stable conditions. The lack of dinocyst and calpionellid zones in the lower part of the section is interpreted by a tectonic reduction of the sediments, resulting from a younger local tectonic event. The specific character of the described limestones reflects microfacies variability of the Pieniny Limestone Formation in the Oravic successions. (C) 2022 Comenius University. All rights reserved.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

10506 - Paleontology

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Geologica Slovaca

ISSN

1338-0044

e-ISSN

1338-5674

Svazek periodika

14

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

14

Strana od-do

73-86

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85139840613