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Biochronology of the terminal Cretaceous calcareous nannofossil zone of Micula prinsii
1993 (English)In: Cretaceous research (Print), ISSN 0195-6671, E-ISSN 1095-998X, Vol. 14, no 1, p. 59-68Article in journal (Refereed) Published
Abstract [en]

Seven Deep Sea Drilling Project (DSDP) sites, were examined in order to determine the chronology of the late Maastrichtian calcareous nannofossil Micula prinsii Zone. Six sites span the terminal Cretaceous palaeolatitudinal interval between 36°S and 37°N in the Atlantic ocean, and one site was from a palaeolatitude of 16°N in the Pacific Ocean. The M. prinsii Zone is often used to demonstrate the presence of terminal Cretaceous sediments. The chronology of the M. prinsii Zone is based on abundance counts and the base of this zone is correlated to the magnetic polarity stratigraphy. Micula prinsii first appeared near the base of subchron C29R. The estimated first appearance of M. prinsii is 0.25 ± 0.02 m.y. before the Cretaceous-Tertiary (K-T) boundary in the South Atlantic, 0.22 ± 0.02 m.y. before the K-T boundary in the North Atlantic and 0.19 ± 0.01 m.y. before the K-T boundary in the North Pacific. The M. prinsii Zone extends up to the K-T boundary, where its index species is among the Cretaceous calcareous nannofossil stock that became extinct. This zone is an important tool for verification of the completeness of terminal Maastrichtian sequences from low to middle latitudes.

Place, publisher, year, edition, pages
1993. Vol. 14, no 1, p. 59-68
Identifiers
URN: urn:nbn:se:ltu:diva-5810DOI: 10.1006/cres.1993.1005Local ID: 3fe3e310-7d74-11dc-b50c-000ea68e967bOAI: oai:DiVA.org:ltu-5810DiVA, id: diva2:978686
Note
Upprättat; 1993; 20071018 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Henriksson, Anders

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