Geological Survey of Finland, Special Paper 46 - arkisto.gsf.fi

The thin (up to 30-40 m) Pleistocene bed in the
North Lithuanian region is subdivided into three
lithostratigraphic complexes. These are: the lower
glacial complex of the Middle Pleistocene (Medininkai
sub-formation) or Upper Pleistocene (Lower
Nemunas sub-formation), the overlying intertill
sediments aged 86-81 thousand years and the upper
till complex of the Baltic Stage of the last Ice Age.
The lower (older) glacial complex in the pre-
Quaternary declensions was formed in the interface
between a glacier advancing from the north and a
The authors are thankful to Dr. A. Molodkov, Head
of the Laboratory of Quaternary Research, Institute
of Geology of Tallinn Technical University, and
palynologist A. Grigien from the Lithuanian Geo-
Baltr0nas, V., Karmaza, B. & Karmazien, D. 2005. Pleistoceno
nuogul< sandaros ir formavimosi ypatybs Šiaurs
Lietuvoje. Geologija 52, 22–33. (in Lithuanian with English
and Russian summary)
Bucevic v
i0t, S., Dobkevic v
ius, M. & Marcinkevic v
ius, V. 1992.
Rajono geologins ir hidrogeologins s_lygos. Karstinio
rajono gamtin ir technogenin situacija. Geologija 13, 30–
49. (in Lithuanian with English and Russian summary)
Gaigalas, A. 1971. Texture, structure and the genetic varieties
of the ground-moraines (in Russian). In: Gudelis, V.
& Gaigalas, A. (eds.) Structure and morphogenesis of the
Middle Lithuanian morainic plain. Mintis, 28–87.
Geological Survey of Finland, Special Paper 46
Structural characteristics of Pleistocene deposits in North Lithuania
CONCLUSIONS
ACKNOWLEDGEMENTS
REFERENCES
pre-Quaternary surface inclined to the north and the
east.
The Upper Pleistocene glacial complex of the
Baltic Stage of the last Ice Age is composed of
strata accumulated during two recessions of the glacier
that advanced from the north. The strata differ
from the older tills in a lower content of imported
clastic material and a higher content of local excavated
material. The strata differ among themselves
in granulometric composition and sorting.
logical Survey for assistance in analysing the sections
of the North Lithuanian Pleistocene deposits
and summarizing the research data.
Lietuvos kvartero stratigrafi jos schema. 1994. Valstybini<
geologini tyrim< taisykls ir metodins rekomendacijos.
Lietuvos geologijos tarnyba. 17 p. (in Lithuanian)
Satk0nas, J. 1999. The Upper Pleistocene stratigraphy and
geochronology in Lithuania. Litosfera 3, 43–57.
Šliaupa, A. 1997. The sub-Quaternary reljef of Lithuania and
of adjacent territories. Litosfera 1, 46–57.
Šliaupa, A. 2004. Prekvartero uolien< paviršius. Lietuvos
˘ems gelmi< raida ir ištekliai (ats. red. Baltr0nas, V.).
˘urnalo “Litosfera” leidinys, 254–260. (in Lithuanian with
English summary)
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