Calcareous nannoplankton mass extinction at the Cretaceous/Tertiary boundary: An update

Pospichal, James J

doi:10.1130/0-8137-2307-8.335

Cited by 31 publications

(28 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…S o m e microplankton groups show rapid and almost total extinction at the Cretaceous/Tertiary boundary [Keller et al, 1995]. For example, the diverse, ecologically and biogeographically stable flora of late Cretaceous calcareous nannoplankton collapsed at the Cretaceous-Tertiary bound- ary, although limited populations of some Cretaceous species persisted for up to several tens of thousands of years into the Palaeocene [Pospichal, 1996].…”

Section: Cretaceous-tertiary Boundarymentioning

confidence: 99%

Diversity of radiolarian families through time

Wever

O’Dogherty

Caridroit

et al. 2003

Bulletin De La Société Géologique De France

View full text Add to dashboard Cite

Abstract. -The examination of radiolarian biodiversity at the family level through Phanerozoic time reveals some general trends known in other groups of organisms, especially among plankton, while some other trends seem to be quite peculiar. The Permian /Triassic crisis that is one of the most important in the evolution of marine organisms, is marked in radiolarian assemblages by the extinction of two orders (Albaillellaria and Latentifistularia) towards the end of the Permian, and mostly by the tremendous diversification of Spumellaria and Nassellaria in the early-mid Triassic. Radiolarian diversity increased from Cambrian to Jurassic, remained quite stable during the Cretaceous and has decreased slightly since then. Diversité des familles de radiolaires au cours du tempsMots clés. -Radiolaires, Famille, Diversité, Paléozoïque, Mésozoïque, Cénozoïque, Extinction, Radiation, Protoctistes.Résumé. -L'examen de la biodiversité des radiolaires, au niveau de la famille au cours du Phanérozoïque révèle quelques tendances générales connues chez d'autres groupes d'organismes, surtout dans le plancton, alors que d'autres tendances leur sont particulières. La crise permo-triasique, l'une des plus importantes dans l'évolution des organismes marins, est marquée chez les radiolaires par l'extinction de deux familles (Albaillellaria et Latentifistularia) vers la fin du Permien, mais surtout par une énorme diversification des spumellaires et nassellaires au Trias inférieur et moyen. La diversité des radiolaires s'accroît du Cambrien au Jurassique, reste relativement stable au Crétacé et décroît légèrement depuis.

show abstract

Section: Cretaceous-tertiary Boundarymentioning

confidence: 99%

Diversity of radiolarian families through time

Wever

O’Dogherty

Caridroit

et al. 2003

Bulletin De La Société Géologique De France

View full text Add to dashboard Cite

show abstract

“…The Cretaceous-Paleogene (K-P) boundary is marked by a mass extinction of calcareous nannofossils (e.g., Bramlette and Martini 1964;Perch-Nielsen et al 1982;Gartner 1996, Pospichal 1996Mai 1999). Some 90% of all Maastrichtian species are assumed to have become extinct immediately at the boundary and/or during the earliest Paleocene and there is consensus that there was no gradual turnover before the K-P boundary (MacLeod et al 1997;Gartner 1996;Gardin 2002).…”

Section: Introductionmentioning

confidence: 99%

Calcareous index nannofossils (coccoliths) of the lowermost Paleocene originated in the late Maastrichtian

Mai¹

2003

Micropaleontology

View full text Add to dashboard Cite

ABSTRACT:The calcareous nannofossil species Neobiscutum romeinii, N. parvulum, and Cruciplacolithus primus, are considered in modern zonation schemes as index species for the lowermost Paleocene. Our studies, however, reveal that they are consistently present in upper Maastrichtian calcareous nannofossil zone CC26. The two Neobiscutum species were found several meters below the Cretaceous-Paleogene (K-P) boundary in cores from Brazos River (Texas) and Antioch Church (Alabama), and in outcrops at Geulhemmerberg (the Netherlands), El Kef (Tunisia), and Jebel Qurtasiyyat (Jordan). Except for the Jordanian record, the same applies to the occurrence of C. primus. These coccoliths are extremely small, ranging from 0.8 to 2.5µm for Neobiscutum and 1.5 to 3.5µm for C. primus, and they constitute less than 1% of the calcareous nannofossil association. This may explain why they were not consistently detected below the K-P boundary in earlier investigations. Since these species are not exclusively Paleocene indicators only their prominent acmes or, alternatively, the index species Biantholithus sparsus should be used to unambiguously identify the lowermost Paleocene. The geographic coverage in our study indicates that the late Maastrichtian appearances of N. romeinii, N. parvulum and C. primus are typical for marginal seas of the Northern Hemisphere.

show abstract

“…The nannofossil assemblage occurring directly above the K/Pg boundary, marked at the base of the Boundary Clay, however, mostly consists of reworked Cretaceous specimens (Pospichal 1994;Bown 2005;Rodríguez-Tovar et al 2010;Kędzierski et al 2011). The abrupt appearance of the Paleocene species is recorded just above the reworking horizon (Thierstein 1981;Pospichal 1995Pospichal , 1996Gardin 2002;Bown 2005). The early Paleocene post-extinction recovery of the calcareous nannoplankton brought new evolutionary lines starting from the so-called newcomer taxa, such as the genera Neobiscutum, Chiasmolithus and Cruciplacolithus (Bown et al 2004 of thermal stratification in the ocean, the condition which advantaged the oligotrophic genera such as Neobiscutum or Cruciplacolithus.…”

Section: Calcareous Nannofossil Biostratigraphymentioning

confidence: 99%

“…and the calcareous dinoflagellates Thoracosphaera spp. or calcisphere fragments (Pospichal 1995;Bown 2005;Lamolda et al 2005), which replaced coccolithophores during their low production post-event times (Fornaciari et al 2007). The nannofossil assemblage occurring directly above the K/Pg boundary, marked at the base of the Boundary Clay, however, mostly consists of reworked Cretaceous specimens (Pospichal 1994;Bown 2005;Rodríguez-Tovar et al 2010;Kędzierski et al 2011).…”

Section: Calcareous Nannofossil Biostratigraphymentioning

confidence: 99%

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

Kędzierski¹,

Gasiński²,

Uchman³

2015

Geologica Carpathica

View full text Add to dashboard Cite

Abstract:In the Gaj section (Polish Carpathians, Skole Nappe, Ropianka Formation), the Late Maastrichtian calcareous nannofossil biostratigraphy is compared with foraminiferal zonation based on the occurrence of the planktonic foraminiferid index species Abathomphalus mayaroensis. It appears that the LO of A. mayaroensis, which has been used previously in the studied section as the possible K/Pg boundary indicator is located below the boundary. The disappearance of A. mayaroensis along with other planktonic foraminiferids before the Cretaceous-Paleogene (K/Pg) boundary mass extinction event may be a consequence of the Late Maastrichtian rapid warming pulses. Moreover, the Paleogene age cannot be supported by the FO of the benthic foraminiferid Rzehakina fissistomata, because it first appears together with the nannofossil Ceratolithoides kamptneri (zonal marker for the latest Maastrichtian UC20c TP Zone). According to the present study, the whole studied section represents the lower Upper to the upper Upper Maastrichtian UC20b TP and UC20c TP nannofossil zones, so that it corresponds to the lower-middle part of the planktonic foraminiferal A. mayaroensis Zone, which, according to the scheme by Caron (1985), should extend up to the K/Pg boundary.

show abstract

Calcareous nannoplankton mass extinction at the Cretaceous/Tertiary boundary: An update

Cited by 31 publications

References 71 publications

Diversity of radiolarian families through time

Diversity of radiolarian families through time

Calcareous index nannofossils (coccoliths) of the lowermost Paleocene originated in the late Maastrichtian

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

Contact Info

Product

Resources

About