Varves and mass-movement deposits record distinctly different sedimentation dynamics since the late glacial (Lake Szurpiły, northeastern Poland)

Małgorzata Kinder , Wojciech Tylmann , Michał Rzeszewski , Bernd Zolitschka

Abstract

The sedimentological and geochemical characteristics of sediments from Lake Szurpiły (northeastern Poland) can be used as a record of mass movement and climate dynamics since the Allerød. Late-glacial sediments suggest enhanced runoff conditions in the catchment after the retreat of the Scandinavian Ice Sheet, while Holocene varved sediments are interrupted by mass-movement deposits (MMDs). We identified 85 thin (<10 cm) MMDs (type 1) that consist of autochthonous material and frequently occur during the Atlantic period. Mobilization of littoral zone and slope sediments caused redeposition in the deepest part of the lake and was likely related to climatic conditions. In contrasting, one sedimentary unit (>1-m-thick MMD type 2) consists of auto- and allochthonous material and represents multistage processes, including erosion and deformation of underlying varved sediments, rapid deposition of clastic material, and redeposition of previously eroded varved sediments. Seismic activity or permafrost degradation was responsible for the deposition of MMD type 2. Furthermore, varve-thickness variability suggests Gleissberg and Suess solar cycles before 850 BC, when human impact was limited. Additionally, 22 and 11 yr sunspot cycles are recognized in light/dark laminae-thickness ratios and reflect influences of solar irradiance on lacustrine productivity.
Author Małgorzata Kinder (FOG / IG / DGQG)
Małgorzata Kinder,,
- Department of Geomorphology and Quarternary Geology
, Wojciech Tylmann (FOG / IG / DGQG)
Wojciech Tylmann,,
- Department of Geomorphology and Quarternary Geology
, Michał Rzeszewski
Michał Rzeszewski,,
-
, Bernd Zolitschka
Bernd Zolitschka,,
-
Journal seriesQuaternary Research, ISSN 0033-5894, e-ISSN 1096-0287, (N/A 100 pkt)
Issue year2020
Vol93
No1
Pages299-313
Publication size in sheets0.7
Keywords in Polishjeziorne osady warwowe, osady ruchów masowych, spływy, późny glacjał, holocen, cykl plam słonecznych, trzęsienia ziemi, wpływ człowieka
Keywords in Englishvarved lake sediments, mass-movement deposits, slumps, late glacial, holocene, sunspot cycles, earthquakes, human impact
ASJC Classification1201 Arts and Humanities (miscellaneous); 1900 General Earth and Planetary Sciences; 1904 Earth-Surface Processes
DOIDOI:10.1017/qua.2019.61
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 20-02-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.019; WoS Impact Factor: 2018 = 2.133 (2) - 2018=2.45 (5)
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