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Chronostratigraphy of the Vistulian glaciation on the Kujawy Moraine Plateau (Central Poland) based on lithostratigraphic research and OSL dating

Przegiętka K. R., Chruścińska A., Oczkowski H. L., Molewski P.

Geochronometria

2008

Vol. 32

69-77

The subject of the investigations presented here is fixing dilemmatic character (transgressive or recessive) of the Poznań phase of the Vistulian (Weichselian) Glaciation and answering the question about the possibility of lithostratigraphic separation of this phase from the Leszno phase in the region of so called Vistula lob. Here we present the outcomes of the research project carried out on a few tills exposures, which constitute the sedimentological record of the last ice sheet advance on the Kujawy Moraine Plateau. The absolute ages of 17 samples (collected from fluvial deposits uncovered in the geological logs) have been determined by means of the OSL method applying the single aliquots regenerative (SAR) dose protocol. The OSL data are analysed with regard to supposed bleaching conditions at the moment of the last transport and deposition of the material. In conclusion, some remarks on suitability of fluvial sands for OSL dating are made. In most of the investigated sites, there appears to exist only a single till level associated with the main stage of the Vistulian Glaciation. This fact and the results of OSL dating support the hypothesis, that the Poznań phase in Kujawy Moraine Plateau is not a distinct lithostratigraphic unit, but it is a recessive phase of the last glaciation.

Próba wykorzystania stożka dylatometyrycznego do wyznaczenia modułów ściśliwości piasków fluwialnych

Wierzbicki J.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

2001

Vol. 10, No. 1

99--107

This paper presents some results of research carried out with new CPT device - dilatocone. The computed values of GD modulus (eq. 4) were compared with the given M modulus values, obtained from DMT (fig. 6). The statistical analysis of obtained trends yields the final equations to compute the constrained moduluses from DCPT (eq. 6 and 7). The comparison of computed MDCPT values with „the best estimated” values for fluvial sand of Holmen Island in Norway is shown on fig. 7.