Journal
BULLETIN OF THE GEOLOGICAL SOCIETY OF FINLAND
Volume 84, Issue -, Pages 33-44Publisher
GEOLOGICAL SOC FINLAND
DOI: 10.17741/bgsf/84.1.003
Keywords
(GeoRef Thesaurus, AGI): eolian features; cover sands; sand; quartz; grain size; roundness; mineral composition; Blonie; Poland
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Funding
- Postdoctoral Research Grant ERMOS (FP7 Marie Curie)
- People programme Age and climatic signature of coversand deposits distributed on glaciolacustrine basins along the Scandinavian Ice Sheer margin southeast of the Baltic Sea
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The coversands distributed in the Blonie glaciolacustrine basin, west of Warsaw (Central Poland) were investigated. Textural features including grain size, rounding and frosting of quartz grains and mineralogical-petrographic composition in the sandy fractions (0.5-0.8 and 0.8-1.0 mm) were examined and the types, dynamics, regime and variation in processes during the formation of the coversands were determined. The sands are characterized by the prevalence of quartz and lack of micaceous minerals. Moreover, the relatively high content of partially rounded, matt (EM/RM) and well-rounded (RM) quartz grains, typical of aeolian sedimentary conditions, was certified. Hence, the results show a high aeolization degree of the investigated sediments, thus correlating them with aeolian deposition in dry, periglacial conditions after drying up of the Warsaw ice-dammed lake.
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