The submitted thesis is devoted to the study of the Neogene
deposits in the area Oleksovice.
Attention was mainly paid to facial analysis, gamma-ray
spectrometry, grain size
and petrographic analysis and study of the grain surface
textures. Three lithofacies have been
identified based on the sedimentary structures recognised in
silty sands and clayey-silty sands.
The strong dominance of quartz and quartz-feldspar aggregate
was recognised, which point
to very mature character of deposits. Such maturity was also
confirmed by gamma-ray
spectrometry. Quartz granules are mostly angular to subangular
and reveal spherical to bladed
shape. The study of grain surface textures (exoscopy) shows
that the sandy quartz grains
are mainly semi-rounded and provide evidence of mostly fluvial
transport, such as V-dents,
sickle shapes and smoothed slats. Microtextures typical for
aeolian transport were rare.