Last occurrence of Abathomphalus mayaroensis (Bolli) foraminiferid index of the Cretaceous–Paleogene boundary: the calcareous nannofossil proof

Kędzierski, Mariusz; Gasiński, M. Adam; Uchman, Alfred

doi:10.1515/geoca-2015-0019

Cited by 6 publications

(5 citation statements)

References 62 publications

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“…Its occurrence depends locally on environmental stress that can exclude this fragile species from the foraminifera assemblage (see Keller and Abramovich, 2009). Therefore, the disappearance of A. mayaroensis cannot be a reliable indicator of age, but rather evidence of environmental change (see also Kędzierski et al, 2015). Similarly, for instance, the nannoplankton species M. murus, index fossil of UC20b TP Zone, also is known as a low-latitude, warm surface taxon, migrating from low-to-high latitudes in accordance with Maastrichtian climate changes .…”

Section: K-pg Boundarymentioning

confidence: 99%

Maastrichtian climate changes – the calcareous nannofossil record from flysch deposits of the Outer Carpathians

Wierzbicki¹,

Kędzierski²

2020

ASGP

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The Maastrichtian, last of the Cretaceous stage, was ended by Cretaceous/Palaeogene (K-Pg) extinction event, recognized as one of the five most severe extinctions throughout the entire Phanerozoic. Therefore, this event marks also beginning of a new era (the Cenozoic). Naturally, such a phenomenon focused the attention of many scientists, leading over time to the enunciation of two main hypotheses explaining possible causes of the event, i.e. an asteroid impact (Alvarez et al., 1980) or intense volcanism (MacLean, 1985).However, these two possible circumstances, which could have led to the end-Cretaceous catastrophe, differ basically in the time of duration, i.e. the rapidness of change, and the stratigraphic position of their record. Thus, the evidence of a sudden and very short-lived extraterrestrial bolide impact ending the Maastrichtian would have been recorded in post-impact deposits belonging stratigraphically to the youngest Danian, or the Cenozoic. In contrast, volcanism during some period before the extinction event should have left its footprint below the K-Pg boundary.Indeed, many studies of the uppermost Maastrichtian deposits revealed their individual geochemical feature that may be linked to phase 2 of Deccan volcanism, initiated

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Section: K-pg Boundarymentioning

confidence: 99%

Maastrichtian climate changes – the calcareous nannofossil record from flysch deposits of the Outer Carpathians

Wierzbicki¹,

Kędzierski²

2020

ASGP

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“…Although there could be several reasons for this dearth of youngest Cretaceous planktonic, the most likely one, consistent with the sedimentological observations, is that being a hiatus at the peak of the Cretaceous regression. The most plausible explanation of the absence of index taxa Abathomphalus mayaroensis is the bathymetry, because this species is bathypelagic, thus absent in shallower areas of the basin (Farouk, 2014;Kędzierski et al, 2015). Another argument is the fact that A. mayaroensis is seldom found in tropical areas (Premoli- Silva and Verga, 2004;Abdallah and Obaidalla, 2013).…”

Section: Interpretations Planktonic Foraminiferal Biostratigraphymentioning

confidence: 99%

Campanian–Maastrichtian foraminiferal stratigraphy and palaeoenvironment of the Lower Tar Member in the Wadi Tar section, Western Sirte Basin (Libya)

Tshakreen¹,

Gasiński²,

Machaniec³

et al. 2017

ASGP

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The Sirte Basin is located in the north-central part of Libya (Fig. 1). It is a basin characterized by a series of platforms and deep troughs containing several oil and gas fields. Depositional history of the Sirte Basin started in the Early Cretaceous time, which has been related to the tectonic evolution of the North African passive continental margin. The history of the Sirte Basin had been spanning the Cretaceous and Palaeogene times. It had been influenced by several marine transgressions and several rifting phases induced by the deformation of the North African continental margin. The relative sea-level changes and the tectonics might have greatly influenced the accomodation space, especially over the Western Sirte Basin (WSB) during the Palaeogene.Because of the numerous oil and gas fields, the geological history of the WSB was the subject of numerous stud-

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“…Notable considerations on the differences in chronostratigraphic position of a certain zonal species of planktonic foraminifera were given in the paper Kędzierski et al (2015). Emphasizing that far more precise bio strati graphic data could be obtained by integrating the results of a number of different methods, such as palaeomagnetostratigraphy and biostratigraphy based on different fossil groups, the authors indicated the existance of the problem of diachronicity of the first and the last occurrence of zonal species, caused by palaeoenvironmental conditions in different bioprovinces.…”

Section: Biostratigraphical Commentsmentioning

confidence: 99%

The Campanian–Maastrichtian foraminiferal biostratigraphy of the basement sediments from the southern Pannonian Basin (Vojvodina, northern Serbia): implications for the continuation of the Eastern Vardar and Sava zones

Dunčić¹,

Dulić²,

Popov³

et al. 2017

Geologica Carpathica

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Abstract:Micropalaeontological and biostratigraphical studies included Campanian-Maastrichtian complexes from five oil exploration wells drilled in northern Serbia (Vojvodina): the first is a carbonate-clastic complex and second is a complex containing ophiolites intercalated with hemipelagic and pelagic sediments. Within the studied complexes, rich associations of planktonic and benthic foraminifera, calcareous nannoplankton, palynomorphs, as well as shallow and deep-water fossil detritus were determined. The presence of relatively rich associations of planktonic foraminifera allowed recognition of two biozones: the Globotruncana ventricosa Zone, observed in the sediments of the carbonateclastic complex and the Gansserina gansseri Zone, observed in both complexes. Except biozones, based on documented index species, for some units in both complexes, larger benthic foraminifera species had special biostratigraphical value, and in some of them, the calcareous nannoplankton zones were recognized. The studied complexes represent deep-water formations, generated in oceanic island arc and trough zones. The presence of limestones, which originate from destroyed rudist reefs, is explained by transfer by means of gravitational transport mechanisms of shallow-water sediments to deep-water depositional environments. In this paper, the results of more detailed biostratigraphical and palaeo-ecological studies of foraminifera associations in Campanian-Maastrichtian complexes in Vojvodina are presented. Combined with lithological studies, seven units were determined within the complexes. The obtained results are important as a part of multidisciplinary, regional exploration of both complexes, generated in specific geological conditions, that today constitute a part of the pre-Neogene basement complex in the southeastern part of the Pannonian Basin. The CampanianMaastrichtian carbonate-clastic complex represents sedimentary cover of the Eastern Vardar Ophiolitic Unit, while the ophiolites intercalated with hemipelagic and pelagic limestones belongs to the Sava Zone.

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Last occurrence of Abathomphalus mayaroensis (Bolli) foraminiferid index of the Cretaceous–Paleogene boundary: the calcareous nannofossil proof

Cited by 6 publications

References 62 publications

Maastrichtian climate changes – the calcareous nannofossil record from flysch deposits of the Outer Carpathians

Maastrichtian climate changes – the calcareous nannofossil record from flysch deposits of the Outer Carpathians

Campanian–Maastrichtian foraminiferal stratigraphy and palaeoenvironment of the Lower Tar Member in the Wadi Tar section, Western Sirte Basin (Libya)

The Campanian–Maastrichtian foraminiferal biostratigraphy of the basement sediments from the southern Pannonian Basin (Vojvodina, northern Serbia): implications for the continuation of the Eastern Vardar and Sava zones

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