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The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)

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Zeitschriftentitel: Geologica Carpathica
Personen und Körperschaften: Svobodová, Andrea, Švábenická, Lilian, Reháková, Daniela, Svobodová, Marcela, Skupien, Petr, Elbra, Tiiu, Schnabl, Petr
In: Geologica Carpathica, 70, 2019, 2, S. 153-182
Format: E-Article
Sprache: Unbestimmt
veröffentlicht:
Walter de Gruyter GmbH
Schlagwörter:
Geology
author_facet Svobodová, Andrea
Švábenická, Lilian
Reháková, Daniela
Svobodová, Marcela
Skupien, Petr
Elbra, Tiiu
Schnabl, Petr
Svobodová, Andrea
Švábenická, Lilian
Reháková, Daniela
Svobodová, Marcela
Skupien, Petr
Elbra, Tiiu
Schnabl, Petr
author Svobodová, Andrea
Švábenická, Lilian
Reháková, Daniela
Svobodová, Marcela
Skupien, Petr
Elbra, Tiiu
Schnabl, Petr
spellingShingle Svobodová, Andrea
Švábenická, Lilian
Reháková, Daniela
Svobodová, Marcela
Skupien, Petr
Elbra, Tiiu
Schnabl, Petr
Geologica Carpathica
The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
Geology
author_sort svobodová, andrea
spelling Svobodová, Andrea Švábenická, Lilian Reháková, Daniela Svobodová, Marcela Skupien, Petr Elbra, Tiiu Schnabl, Petr 1336-8052 Walter de Gruyter GmbH Geology http://dx.doi.org/10.2478/geoca-2019-0009 <jats:title>Abstract</jats:title> <jats:p>Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow construction of a detailed stratigraphy and paleoenvironmental interpretation across the Jurassic/Cretaceous (J/K) boundary. The Kurovice section consists of allodapic and micrite limestones and marlstones. Identified standard microfacies types SMF 2, SMF 3 and SMF 4 indicate that sediments were deposited on a deep shelf margin (FZ 3), with a change, later, into distal basin conditions and sediments (FZ 1). The sequence spans a stratigraphic range from the Early Tithonian calcareous dinoflagellate Malmica Zone, nannoplankton zone NJT 15 and magnetozone M 21r to the late Early Berriasian calpionellid Elliptica Subzone of the Calpionella Zone, nannoplankton NK-1 Zone and M 17r magnetozone. The J/K boundary is marked by a quantitative increase of small forms of <jats:italic>Calpionella alpina</jats:italic>, the base of the Alpina Subzone (that corresponds to NJT 17b and M 19n.2n) and by the rare occurrence of <jats:italic>Nannoconus wintereri.</jats:italic> Palynomorphs include Early Berriasian terrestrial elements — non-calcareous dinoflagellate cysts <jats:italic>Achomosphaera neptunii, Prolixosphaeridium</jats:italic> sp. A and <jats:italic>Tehamadinium evittii</jats:italic>. The depositional area for Kurovice was situated at the margin of the NW Tethys. The influence of cold waters from northern latitudes and potential upwellings is highlighted by: 1) the high proportion of radiolarians and sponge spicules, 2) rare calpionellids represented mostly by hyaline forms, 3) the absence of microgranular calpionellids — chitinoidellids, 4) the small percentage of the genera <jats:italic>Nannoconus, Polycostella</jats:italic> and <jats:italic>Conusphaera</jats:italic> in nannofossil assemblages, as compared to other sites in Tethys, 5) scarce <jats:italic>Nannoconus compressus,</jats:italic> which has otherwise been mentioned from the Atlantic area.</jats:p> The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin) Geologica Carpathica
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title The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_unstemmed The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_full The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_fullStr The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_full_unstemmed The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_short The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_sort the jurassic/cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (outer western carpathians, the northern tethyan margin)
topic Geology
url http://dx.doi.org/10.2478/geoca-2019-0009
publishDate 2019
physical 153-182
description <jats:title>Abstract</jats:title> <jats:p>Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow construction of a detailed stratigraphy and paleoenvironmental interpretation across the Jurassic/Cretaceous (J/K) boundary. The Kurovice section consists of allodapic and micrite limestones and marlstones. Identified standard microfacies types SMF 2, SMF 3 and SMF 4 indicate that sediments were deposited on a deep shelf margin (FZ 3), with a change, later, into distal basin conditions and sediments (FZ 1). The sequence spans a stratigraphic range from the Early Tithonian calcareous dinoflagellate Malmica Zone, nannoplankton zone NJT 15 and magnetozone M 21r to the late Early Berriasian calpionellid Elliptica Subzone of the Calpionella Zone, nannoplankton NK-1 Zone and M 17r magnetozone. The J/K boundary is marked by a quantitative increase of small forms of <jats:italic>Calpionella alpina</jats:italic>, the base of the Alpina Subzone (that corresponds to NJT 17b and M 19n.2n) and by the rare occurrence of <jats:italic>Nannoconus wintereri.</jats:italic> Palynomorphs include Early Berriasian terrestrial elements — non-calcareous dinoflagellate cysts <jats:italic>Achomosphaera neptunii, Prolixosphaeridium</jats:italic> sp. A and <jats:italic>Tehamadinium evittii</jats:italic>. The depositional area for Kurovice was situated at the margin of the NW Tethys. The influence of cold waters from northern latitudes and potential upwellings is highlighted by: 1) the high proportion of radiolarians and sponge spicules, 2) rare calpionellids represented mostly by hyaline forms, 3) the absence of microgranular calpionellids — chitinoidellids, 4) the small percentage of the genera <jats:italic>Nannoconus, Polycostella</jats:italic> and <jats:italic>Conusphaera</jats:italic> in nannofossil assemblages, as compared to other sites in Tethys, 5) scarce <jats:italic>Nannoconus compressus,</jats:italic> which has otherwise been mentioned from the Atlantic area.</jats:p>
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author Svobodová, Andrea, Švábenická, Lilian, Reháková, Daniela, Svobodová, Marcela, Skupien, Petr, Elbra, Tiiu, Schnabl, Petr
author_facet Svobodová, Andrea, Švábenická, Lilian, Reháková, Daniela, Svobodová, Marcela, Skupien, Petr, Elbra, Tiiu, Schnabl, Petr, Svobodová, Andrea, Švábenická, Lilian, Reháková, Daniela, Svobodová, Marcela, Skupien, Petr, Elbra, Tiiu, Schnabl, Petr
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container_issue 2
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container_title Geologica Carpathica
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description <jats:title>Abstract</jats:title> <jats:p>Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow construction of a detailed stratigraphy and paleoenvironmental interpretation across the Jurassic/Cretaceous (J/K) boundary. The Kurovice section consists of allodapic and micrite limestones and marlstones. Identified standard microfacies types SMF 2, SMF 3 and SMF 4 indicate that sediments were deposited on a deep shelf margin (FZ 3), with a change, later, into distal basin conditions and sediments (FZ 1). The sequence spans a stratigraphic range from the Early Tithonian calcareous dinoflagellate Malmica Zone, nannoplankton zone NJT 15 and magnetozone M 21r to the late Early Berriasian calpionellid Elliptica Subzone of the Calpionella Zone, nannoplankton NK-1 Zone and M 17r magnetozone. The J/K boundary is marked by a quantitative increase of small forms of <jats:italic>Calpionella alpina</jats:italic>, the base of the Alpina Subzone (that corresponds to NJT 17b and M 19n.2n) and by the rare occurrence of <jats:italic>Nannoconus wintereri.</jats:italic> Palynomorphs include Early Berriasian terrestrial elements — non-calcareous dinoflagellate cysts <jats:italic>Achomosphaera neptunii, Prolixosphaeridium</jats:italic> sp. A and <jats:italic>Tehamadinium evittii</jats:italic>. The depositional area for Kurovice was situated at the margin of the NW Tethys. The influence of cold waters from northern latitudes and potential upwellings is highlighted by: 1) the high proportion of radiolarians and sponge spicules, 2) rare calpionellids represented mostly by hyaline forms, 3) the absence of microgranular calpionellids — chitinoidellids, 4) the small percentage of the genera <jats:italic>Nannoconus, Polycostella</jats:italic> and <jats:italic>Conusphaera</jats:italic> in nannofossil assemblages, as compared to other sites in Tethys, 5) scarce <jats:italic>Nannoconus compressus,</jats:italic> which has otherwise been mentioned from the Atlantic area.</jats:p>
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spelling Svobodová, Andrea Švábenická, Lilian Reháková, Daniela Svobodová, Marcela Skupien, Petr Elbra, Tiiu Schnabl, Petr 1336-8052 Walter de Gruyter GmbH Geology http://dx.doi.org/10.2478/geoca-2019-0009 <jats:title>Abstract</jats:title> <jats:p>Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow construction of a detailed stratigraphy and paleoenvironmental interpretation across the Jurassic/Cretaceous (J/K) boundary. The Kurovice section consists of allodapic and micrite limestones and marlstones. Identified standard microfacies types SMF 2, SMF 3 and SMF 4 indicate that sediments were deposited on a deep shelf margin (FZ 3), with a change, later, into distal basin conditions and sediments (FZ 1). The sequence spans a stratigraphic range from the Early Tithonian calcareous dinoflagellate Malmica Zone, nannoplankton zone NJT 15 and magnetozone M 21r to the late Early Berriasian calpionellid Elliptica Subzone of the Calpionella Zone, nannoplankton NK-1 Zone and M 17r magnetozone. The J/K boundary is marked by a quantitative increase of small forms of <jats:italic>Calpionella alpina</jats:italic>, the base of the Alpina Subzone (that corresponds to NJT 17b and M 19n.2n) and by the rare occurrence of <jats:italic>Nannoconus wintereri.</jats:italic> Palynomorphs include Early Berriasian terrestrial elements — non-calcareous dinoflagellate cysts <jats:italic>Achomosphaera neptunii, Prolixosphaeridium</jats:italic> sp. A and <jats:italic>Tehamadinium evittii</jats:italic>. The depositional area for Kurovice was situated at the margin of the NW Tethys. The influence of cold waters from northern latitudes and potential upwellings is highlighted by: 1) the high proportion of radiolarians and sponge spicules, 2) rare calpionellids represented mostly by hyaline forms, 3) the absence of microgranular calpionellids — chitinoidellids, 4) the small percentage of the genera <jats:italic>Nannoconus, Polycostella</jats:italic> and <jats:italic>Conusphaera</jats:italic> in nannofossil assemblages, as compared to other sites in Tethys, 5) scarce <jats:italic>Nannoconus compressus,</jats:italic> which has otherwise been mentioned from the Atlantic area.</jats:p> The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin) Geologica Carpathica
spellingShingle Svobodová, Andrea, Švábenická, Lilian, Reháková, Daniela, Svobodová, Marcela, Skupien, Petr, Elbra, Tiiu, Schnabl, Petr, Geologica Carpathica, The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin), Geology
title The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_full The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_fullStr The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_full_unstemmed The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_short The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
title_sort the jurassic/cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (outer western carpathians, the northern tethyan margin)
title_unstemmed The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)
topic Geology
url http://dx.doi.org/10.2478/geoca-2019-0009