Cryogenic separation of glauconite and foraminifera from Cretaceous/Paleogene boundary in Nasiłów, Poland, for radiometric dating and stratigraphy

Artur Wójtowicz, Tomasz Pieńkos, Stanisław Hałas, Danuta Peryt, Tomasz Durakiewicz, Agnieszka Młynek


We have demonstrated that cryogenic separation of glauconite and foraminifera from the host rock allows to preserve the integrity of extracted specimens, assures minimal damage and causes no artificial fractionation. The K/Ar dating of two glauconite samples from Cretaceous/Paleogene boundary in the Nasiłów outcrop yields 62.0 and 66.3 Ma. The discrepancy in these dates, much larger than expected from analytical precision, may result from too low %K, which was 5.91 and 5.73, respectively.

Full Text:



Nowak J., Durakiewicz T., Hałas, S. (2002) Separation of single-mineral grains by means of cryogenic disintegrator and the LST heavy liquid for radiometric dating, Materials of the “6th Session on Dating of Minerals and Rocks”, Warsaw, Poland, 2002, 40-47.

Durakiewicz T., Wójtowicz A., Banaś M., Kalicka L., (1997) Isotopic composition of oxygen in Tertiary glauconites dated by K/Ar method, Materials of the “4th Session on Dating of Minerals and Rocks”, 11-12 December 1997, Lublin, 27-40.

Pożaryska K. (1965) Foraminifera and biostratigraphy of the Danian and Montian in Poland, Palaeontologia Polonica 14, 1-156.

Machalski M., Walaszczyk I. (1987) Faunal condensation and mixing in the uppermost Maastrichtian/Danian Greensand (Middle Vistula Valley, Central Poland), Acta Geologica Polonica 37, 1-2, 75-91.

Hansen H.J., Rasmussen K.L., Gwóźdź, R., Hansen, J.M., Radwański, A. (1989) The Cretaceous/Tertiary boundary in Central Poland, Acta Geologica Polonica 39, 1-4, 1-12.

Machalski M. (1998) Granica kreda-trzeciorzęd w przełomie Wisły, Przegl. Geol. 46, 11, 1153-1161.

Pożaryski W. (1938) Stratygrafia senonu w przełomie Wisły między Rachowem i Puławami. Senonstratigraphie im Durchbruch der Weichsel zwischen Rachów und Puławy in Mittelpolen, Bull. Geol. Surv. Poland 6, 1-94.

Abdel-Gawad G. I. (1986) Maastrichtian non-cephalopod mollusks (Scaphopoda, Gastropoda and Bivalvia) of the Middle Vistula Valley, Central Poland, Acta Geologica Polonica 36, 1-3, 69-224.

Peryt D. (1988) Maastrichtian extinctions of planktonic Foraminifera in Central and Eastern Poland, Revista Española de Paleontologia 3, 105-114.

Żarski M., Jakubowski G., Gawor-Biedowa E. (1998) The first Polish find of a Lower Paleocene crocodile Thoracosaurus Leidy, 1852: geological and palaeontological description, Geological Quarterly 42, 2, 121-130.

Odin G.S., Dodson M.M., Zero isotopic age of glauconites, inin: G.S. Odin (ed.), Numerical Dating in Stratigraphy, Wiley (1982) 277-305.

Data publikacji: 2015-05-22 14:22:43
Data złożenia artykułu: 2015-04-22 19:50:08


  • There are currently no refbacks.

Copyright (c) 2015 Annales Universitatis Mariae Curie-Sklodowska, sectio AAA – Physica

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.