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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F19%3A00000047" target="_blank" >RIV/00025798:_____/19:00000047 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/19:00504498 RIV/61989100:27350/19:10242291

Výsledek na webu

<a href="http://www.geologicacarpathica.com/browse-journal/volumes/70-2/article-909" target="_blank" >http://www.geologicacarpathica.com/browse-journal/volumes/70-2/article-909</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/geoca-2019-0009" target="_blank" >10.2478/geoca-2019-0009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 magnetozoneM 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 Calpionella alpina, the base of the Alpina Subzone (that corresponds to NJT 17b and M 19n.2n) and by the rare occurrence of Nannoconus wintereri.Palynomorphs include Early Berriasian terrestrial elements — noncalcareous dinoflagellate cysts Achomosphaera neptunii, Prolixosphaeridium sp. A and Tehamadinium evittii. The depositional area for Kurovice was situated atthe 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 Nannoconus, Polycostella and Conusphaera in nannofossil assemblages, as compared to other sites in Tethys, 5) scarce Nannoconus compressus, which has otherwise been mentioned from the Atlantic area.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 magnetozoneM 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 Calpionella alpina, the base of the Alpina Subzone (that corresponds to NJT 17b and M 19n.2n) and by the rare occurrence of Nannoconus wintereri.Palynomorphs include Early Berriasian terrestrial elements — noncalcareous dinoflagellate cysts Achomosphaera neptunii, Prolixosphaeridium sp. A and Tehamadinium evittii. The depositional area for Kurovice was situated atthe 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 Nannoconus, Polycostella and Conusphaera in nannofossil assemblages, as compared to other sites in Tethys, 5) scarce Nannoconus compressus, which has otherwise been mentioned from the Atlantic area.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA16-09979S" target="_blank" >GA16-09979S: Integrované multidisciplinární studium hranice jura-křída v mořských sekvencích: příspěvek pro globální definici hranice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Geologica Carpathica

ISSN

1335-0552

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

30

Strana od-do

153-182

Kód UT WoS článku

000464727300004

EID výsledku v databázi Scopus

2-s2.0-85063080608