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Exceptionally favourable life conditions for macrobenthos during the Late Cenomanian OAE-2 event : ichnological record from the Bonarelli Level in the Grajcarek Unit, Polish Carpathians
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Exceptionally favourable life conditions for macrobenthos during the Late Cenomanian OAE-2 event : ichnological record from the Bonarelli Level in the Grajcarek Unit, Polish Carpathians
Bibliographic description
| title: | Exceptionally favourable life conditions for macrobenthos during the Late Cenomanian OAE-2 event : ichnological record from the Bonarelli Level in the Grajcarek Unit, Polish Carpathians |
| author: | Uchman Alfred  , Rodríguez-Tovar Francisco Javier, Oszczypko Nestor
|
| journal title: | Cretaceous Research |
| volume: | 46 |
| date of publication : | 2013 |
| pages: | 1-10 |
| ISSN: |
0195-6671 |
| eISSN: |
1095-998X |
| DOI: | |
| language: | English |
| journal language: | English |
| abstract in English: | Pelagic and hemipelagic sediments of the Bonarelli Level (uppermost Cenomanian) in the Sztolnia section (Grajcarek Unit, Polish Carpathians) contain trace fossils of the Zoophycos ichnofacies, including (in descending order of abundance): Chondrites (smaller and larger forms), Planolites, Thalassinoides, Palaeophycus, Taenidium, Teichichnus, and Zoophycos. They occur in thick bioturbated layers, which are interbedded with rare, thin layers of unbioturbated black shales. The black shale layers mark the Bonarelli Level and are interpreted as a record of anoxia or dysoxia. Coeval sections in the Western Tethys contain similar trace fossils but they are less abundant and these sections are characterized by thicker unbioturbated black shale layers and thinner bioturbated layers. This confirms the exceptionally favourable life conditions in sediments of the Sztolnia section, which do not record strong global anoxia during the OAE-2 event. Such favourable conditions were probably caused by effective oxygenation of pore waters and deep burial of organic matter, which are a consequence of high rates of accumulation and the palaeogeographical location of the section on a flank of a submarine high, under strong circulation. |
| keywords in English: | oceanic anoxic events, ichnology, Cretaceous, Carpathians |
| affiliation: | Wydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznych |
| type: | journal article |
| subtype: | academic paper |
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Projekt „Repozytorium otwartego dostępu do dorobku naukowego i dydaktycznego UJ” współfinansowany w ramach poddziałania 2.3.1 „Cyfrowe udostępnianie zasobów nauki” Programu Operacyjnego Polska Cyfrowa z Europejskiego Funduszu Rozwoju Regionalnego i budżetu państwa na podstawie umowy o dofinansowanie nr POPC.02.03.01-00-0030/17-00
