Variations in calcareous dinoflagellate associations from the Maastrichtian to Middle Eocene of the western South Atlantic Ocean (São Paulo Plateau, DSDP Leg 39, Site 356)

Hildebrand-Habel, Tania; Willems, Helmut; Versteegh, Gerard J.M.

doi:10.1016/s0034-6667(98)00079-7

Cited by 40 publications

(29 citation statements)

References 53 publications

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“…The first sample, corresponding to Bd-15 (+6 cm), is characterized by abundant Operculodinella associated with M. inversus, M. apertus, C. reinhardtii, C. alta and few Maastrichtian taxa. Operculodinella operculata (calcareous dinoflagellate) represents a persistent taxon, surviving the K-Pg boundary, and the increase in abundance of this form reflects ecological stress after the rapid environmental changes at the boundary (Hildebrandt-Habel et al, 1999). The second appearance, in samples Bd-17 (+17 cm), and , is characterized by an increased abundance of Braarudosphaera bigelowii and B. alta, displacing Operculodinella; the assemblage mainly consists of Octolithus multiplus, M. inversus, M. apertus, C. alta, C. reinhardtii and a few Maastrichtian taxa.…”

Section: [ ( F I G _ 3 ) T D $ F I G ]mentioning

confidence: 99%

Bioturbational redistribution of Danian calcareous nannofossils in the uppermost Maastrichtian across the K-Pg boundary at Bidart, SW France

Rodríguez‐Tovar

Uchman

Molina

et al. 2010

Geobios

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In this paper we present the effects of different tracemakers on the redistribution of calcareous nannofossils throughout the K-Pg boundary at the Bidart section (SW France), along with their consequences for our knowledge of the K-Pg boundary event. Danian calcareous nannofossil assemblages are present in Maastrichtian samples due to infiltration into dark trace fossil infillings proceeding from the earliest Paleogene. This is evidenced by the appearance of abundant paleogene calcareous nannofossils just below the K-Pg boundary, showing the relevance of the trace fossil infillings in the context of the K-Pg boundary event. # 2010 Elsevier Masson SAS. All rights reserved.Keywords: Cretaceous-Paleogene boundary; Trace fossils; Calcareous nannofossils; Redistribution; Bidart section; SW France Résumé Dans cet article, nous présentons les effets des organismes bioturbateurs sur le remaniement de nannofossiles calcaires autour de la limite C-Pg dans la coupe de Bidart (SW France), ainsi que leurs conséquences pour la compréhension de l'événement de la limite C-Pg. Des assemblages de nannofossiles typiquement daniens sont présents dans des échantillons du Maestrichtien, remaniés par infiltration, dans des remplissages de couleur sombre de traces fossiles formées au début du Paléogène. Cela est montré par la présence d'abondants nannofossiles calcaires paléogènes juste sous la limite C-Pg, montrant tout l'intérêt de l'étude des remplissages de traces fossiles dans le contexte de l'événement de la limite C-Pg. # 2010 Elsevier Masson SAS. Tous droits réservés.

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Section: [ ( F I G _ 3 ) T D $ F I G ]mentioning

confidence: 99%

Bioturbational redistribution of Danian calcareous nannofossils in the uppermost Maastrichtian across the K-Pg boundary at Bidart, SW France

Rodríguez‐Tovar

Uchman

Molina

et al. 2010

Geobios

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“…Based on culturing experiments, Meier et al (2002) regarded C. elongatum as an independent species and not a forma, as originally suggested by Hildebrand-Habel et al (1999). This view is followed here.…”

Section: Emended Diagnosis Of Janofske Andmentioning

confidence: 64%

“…They proposed the transfers of Sphaerodinella? tuberosa forma elongata Hildebrand-Habel, Willems and Versteegh 1999 to Pernambugia as Pernambugia tuberosa forma elongata, and Sphaerodinella? tuberosa forma variospinosa Hildebrand-Habel, Willems and Versteegh 1999 to Pernambugia as Pernambugia tuberosa forma variospinosa.…”

Section: Introductionmentioning

confidence: 99%

“…tuberosa forma elongata Hildebrand-Habel, Willems and Versteegh 1999 to Pernambugia as Pernambugia tuberosa forma elongata, and Sphaerodinella? tuberosa forma variospinosa Hildebrand-Habel, Willems and Versteegh 1999 to Pernambugia as Pernambugia tuberosa forma variospinosa. In order to clarify the systematics of these taxa and bring the taxonomy into line with current concepts, we herein propose the new combinations Calciodinellum elongatum and Calciodinellum levantinum forma variospinosum.…”

Section: Introductionmentioning

confidence: 99%

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Clarification of the systematic position of two calcareous dinoflagellate taxa belonging to the genus Calciodinellum (Dinophyceae, Peridiniales)

et al. 2006

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“…† Thoracosphaera is a calcareous dinoflagellate genus that blooms under stressful marine conditions, as recorded, for instance, just above the K-T (Cretaceous -Tertiary) boundary (Romein 1977;Pospichal 1995;Gardin & Monechi 1998;Lamolda et al 2005 among many others) in the Lower Cretaceous sediments of the Indian Ocean (Bralower 1992) and across the Paleocene-Eocene transition in the sub-equatorial Pacific (Raffi et al 2005). Its increased abundance was interpreted to reflect unusual environmental conditions, such as large amounts of CO 2 , and fluctuations in salinity and pH of surface waters, accompanied by episodes of considerable warming (Hildebrand-Habel et al 1999).…”

Section: Calcareous Nannofossilsmentioning

confidence: 99%

Cretaceous Oceanic Anoxic Event 2 in the Arobes section, northern Spain: nannofossil fluctuations and isotope events

Bernárdez

Kaiho

Lamolda

2013

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The Cenomanian-Turonian boundary interval of the Arobes section, northern Spain, represents the maximum depth of a relatively shallow succession. The investigated section extends within the Rotalipora cushmani and Whiteinella archaeocretacea planktonic foraminiferal zones, and from UC3 up to UC8 nannofloral zones, respectively. The Oceanic Anoxic Event 2 (OAE2) is about 16 m thick and includes a positive d 13 C excursion, from 3 up to 5.5‰. The first peak of d 13 C is situated towards the upper part of the Rotalipora cushmani planktonic foraminiferal zone, while the second peak of d 13 C is situated in the lower part of the Whiteinella archaeocretacea planktonic foraminiferal zone. The plateau, the youngest phase of OAE2, ends slightly above the first occurrence (FO) of the nannofossil Quadrum gartneri. Based on nannofloral fluctuation, an unstable environment is recognized from the last occurrence (LO) of the nannofossil Axopodorhabdus albianus up to the FO of the nannofossil Quadrum gartneri. Mesotrophic, eutrophic and oligotrophic nannofossils have successive peaks throughout the OAE2. In the lower part of OAE2, especially in the trough phase and second build-up, productivity increased. The calcareous dinoflagellate Thoracosphaera spp. peaks up to almost 30% in the lower part of the second build-up phase. The critical nannofloral turnover episode is characterized by impoverished calcareous nannofossil assemblages and temporary disappearances of high-fertility taxa, such as Biscutum constans and Zeugrhabdotus erectus. This shift in nannofloral assemblages starts in the last stages of OAE2; that is, towards the top of the second build-up phase and also covers the main part of the plateau phase of d 13 C.

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Variations in calcareous dinoflagellate associations from the Maastrichtian to Middle Eocene of the western South Atlantic Ocean (São Paulo Plateau, DSDP Leg 39, Site 356)

Cited by 40 publications

References 53 publications

Bioturbational redistribution of Danian calcareous nannofossils in the uppermost Maastrichtian across the K-Pg boundary at Bidart, SW France

Bioturbational redistribution of Danian calcareous nannofossils in the uppermost Maastrichtian across the K-Pg boundary at Bidart, SW France

Clarification of the systematic position of two calcareous dinoflagellate taxa belonging to the genus Calciodinellum (Dinophyceae, Peridiniales)

Cretaceous Oceanic Anoxic Event 2 in the Arobes section, northern Spain: nannofossil fluctuations and isotope events

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