<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></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.

Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S Poland

Institute of Geology, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznan, Poland

Faculty of Computing Science and Management, Institute of Civil Engineering, Poznań University of Technology, 60-965 Poznań

Institute of Geology, University of Wrocław, Plac Maksa Borna 9, 50-204 Wrocław

Geologos

The depositional conditions of kame terraces in a mountain valley were analysed sedimentologically and petrologically through a series of kame terraces in the...

Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S Poland

Pubblicato online: 14 lug 2010

Pagine: 101 - 110

DOI: https://doi.org/10.2478/v10118-009-0008-8

Parole chiave
kame terrace, confined braided rivers, lithofacies analysis, sediment-petrographical analysis, Pleistocene, Sudety Mountains

This content is open access.

Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S Poland

Pubblicato online: 14 lug 2010

Pagine: 101 - 110

DOI: https://doi.org/10.2478/v10118-009-0008-8

Parole chiavekame terrace, confined braided rivers, lithofacies analysis, sediment-petrographical analysis, Pleistocene, Sudety Mountains

This content is open access.

Parole chiave
kame terrace, confined braided rivers, lithofacies analysis, sediment-petrographical analysis, Pleistocene, Sudety Mountains