Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S Poland
Loading...
Date
2010-06
Advisor
Editor
Journal Title
Journal ISSN
Volume Title
Publisher
Bogucki wydawnictwo Naukowe
Title alternative
Abstract
The depositional conditions of kame terraces in a mountain valley were analysed sedimentologically and petrologically
through a series of kame terraces in the Rudawy Janowickie mountains. The kame terraces comprise five lithofacies
associations. Lithofacies association GRt, Sp originates from deposition in the high-energy, deep gravel-bed channel of
a braided river. Lithofacies association GC represents a washed out glacial till. Probably a thin layer of till was washed
out by sandy braided rivers (Sp). The fourth association (Fh, Fm) indicates a shallow and quite small glaciomarginal
lake. The last association (GRt, GRp) indicates the return of deposition in a sandy-bed braided channel. The petrography
of the Janowice Wiekie pit and measurements of cross-stratified beds indicate a palaeocurrent direction from N
to S. The Janowice Wielkie sedimentary succession accumulated most probably during the Saalian (Odranian, Saale I,
Drenthe) as the first phase of ice-sheet melting, because the kame terrace under study is the highest one, 25-27 m above
the Bóbr river level. The deposits under study are dominated by local components. The proglacial streams flowed along
the margin of the ice sheet and deposited the kame terrace. The majority of the sedimentary succession was deposited
in a confined braided-river system in quite deep channels.
Description
Sponsor
Keywords
Kame terrace, Confined braided rivers, Lithofacies analysis, Sediment-petrographical analysis, Pleistocene, Sudety Mountains
Citation
Geologos vo. 16 (2), 2010, pp. 101-110.