期刊
TERRA NOVA
卷 27, 期 3, 页码 225-230出版社
WILEY
DOI: 10.1111/ter.12151
关键词
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资金
- University of Zaragoza [JIUZ-2013-CIE-01]
- Spanish Ministry of Science and Innovation-FEDER [CGL2011-23077, CGL2012-33281]
- Junta de Andalucia [RNM-178]
- Jagiellonian University (DS Funds)
- [RNM-3715]
The Cretaceous-Palaeogene (K/Pg) boundary interval is often penetrated by burrows, which may obscure stratigraphic and micropalaeontological records, leading to misinterpretations of the sequence of events spanning the K/Pg boundary. Here, we assess the role of burrowing organisms in the redistribution of benthic foraminifera across the boundary at Bidart (France), and report a strong relationship between the behaviour represented by pre- and post-K/Pg trace fossils and their benthic foraminiferal content. We further infer a brief interval of eutrophic conditions at the seafloor, as reported from other locations, which disappeared from the lowermost Danian stratigraphic record and is represented only inside post-K/Pg trace fossils hosted in Cretaceous strata. The combined study of trace fossils and microfossils is a powerful tool in eco-stratigraphy and event-stratigraphy, and can yield important insights into the completeness of the K/Pg record, especially at locations such as Bidart where this interval has traditionally been assumed to be complete.
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