Terrace styles and timing of terrace formation in the Weser and Leine valleys, northern Germany: Response of a fluvial system to climate change and glaciation

Winsemann, Jutta; Lang, Jörg; Roskosch, Julia; Polom, Ulrich; Böhner, Utz; Brandes, Christian; Glotzbach, Christoph; Frechen, Manfred

doi:10.1016/j.quascirev.2015.06.005

Cited by 39 publications

(21 citation statements)

References 125 publications

(237 reference statements)

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“…However, these deposits strongly differ from the typical fluvial sediments of the River Weser, which commonly consist of much better sorted and rounded gravel and sand (Rohde ; Winsemann et al . ).…”

Section: Methodsmentioning

confidence: 97%

Flow dynamics, sedimentation and erosion of glacial lake outburst floods along the Middle Pleistocene Scandinavian Ice Sheet (northern central Europe)

Winsemann

Alho

Laamanen

et al. 2015

Boreas

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During the Middle Pleistocene late Saalian glaciation of northern central Europe numerous pro‐glacial lakes formed along the southwestern margin of the Scandinavian Ice Sheet. Little is known about the drainage history of these lakes, the pathways of glacial lake outburst floods and their impacts on erosion, sedimentation and landscape evolution. This study investigated the impact of the late Saalian Weser and Münsterland Lake (Germany) outburst floods. In particular, we reconstructed the routing and flow dynamics of the lake outburst flood and analysed the flood related sediments. We employed one‐dimensional hydraulic modelling to calculate glacial lake outburst flood hydrographs. We modelled the flow pathway and local flow conditions along the pathway based on the boundary conditions of two different hydrographs and two different ice‐margin positions. The modelling results were compared with geomorphological and sedimentological field data in order to estimate the magnitude and impact of the flood on erosion and sedimentation. Two major lake drainage events are reconstructed for the study area, during which approximately 90–50 km3 of water was released. Modelling results indicate that the lake outburst floods created a high‐energy flood wave with a height of 35–50 m in confined valley areas that rapidly spread out into the Lower Rhine Embayment eventually flowing into the North Sea basin. The sedimentary record of the outburst floods comprises poorly sorted coarse‐grained gravel bars, long‐wavelength bedforms and sandy bedforms deposited by supercritical and subcritical flows. Some parts of the sandy flood deposits are rich in reworked mammoth bones or mammoth and horse teeth, pointing to reworking of older fluvial sediments, hydraulic concentration and subsequent re‐sedimentation of vertebrate remains. These deposits are preserved in sheltered areas or at high elevations, well above the influence of postglacial fluvial erosion. The flood‐related erosional features include up to 80‐m‐deep scour pools, alluvial channels and streamlined hills.

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Section: Methodsmentioning

confidence: 97%

Flow dynamics, sedimentation and erosion of glacial lake outburst floods along the Middle Pleistocene Scandinavian Ice Sheet (northern central Europe)

Winsemann

Alho

Laamanen

et al. 2015

Boreas

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“…The advancing ice margin controlled the extents of the fluvial basins and played the role of base level in this model (cf. Winsemann et al 2015).…”

Section: Glacial Factor Vs Fluvial Processesmentioning

confidence: 99%

“…Compared to those studies, sedimentary reconstructions of rivers from older glaciations are slightly less numerous (e.g. Bridgland 2000;Busschers et al 2008;Gibbard & Lewin 2009;Winsemann et al 2015). Amongst the Pleistocene fluvial systems, of particular interest were those situated close to the advancing ice sheets, as their development was additionally affected by the glacial factor.…”

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confidence: 95%

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Response of a mountain‐foreland fluvial system to an advancing ice sheet, southern Poland

Salamon

Zieliński

2019

Boreas

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In this paper, fluvial deposits of Middle Pleistocene age in the mountain‐foreland area of southern Poland (Eastern Sudetes and Western Carpathians) are studied in order to document the evolution of fluvial systems during the coldest stages of glacial periods when the Scandinavian Ice Sheet advanced far to the south. The focus is on fluvial response to climate change and glacial impact on river system behaviour. Also considered is the tectonic uplift of the mountain part of river catchments and its potential influence on the style of fluvial sedimentation in the fore‐mountain area. Three drainage basins that were active during the Elsterian and Saalian glaciations are investigated. Facies analyses are carried out on thick successions of braided river deposits covered with till or glaciolacustrine sediments, which result in a reconstruction of the fluvial activity synchronous with the ice‐sheet advance. The results suggest that fluvial activity declined prior to ice‐sheet advance into the fore‐mountain area. This climatically induced change is directly recorded in alluvial successions by upward‐decreasing bed thicknesses and grain sizes. River longitudinal profiles were shortened in front of the advancing ice sheet. The base level of the studied rivers, created by the ice‐sheet margin, rose in parallel with glacial advance. As a result, the successive reaches of rivers (degradational, transitional, aggradational) underwent shortening and moved upstream within the catchments. Moreover, tectonically induced local increases of river slopes may have influenced the depositional processes.

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“…Rohde et al, 2012). For further detailed information on the sedimentology of the Nachtigall deposits and the large-scale depositional architecture, which is being reconstructed from the outcrop section and digital elevation models, see Winsemann et al (2015).…”

Section: Study Areamentioning

confidence: 99%

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

2015

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Abstract:Luminescence dating was applied on coarse-grained monomineralic potassium-rich feldspar and polymineralic fine-grained minerals of five samples derived from fluvial deposits of the River Weser in northwestern Germany. We used a pulsed infrared stimulated luminescence (IRSL) single aliquot regenerative (SAR) dose protocol with an IR stimulation at 50°C for 400 s (50 µs on-time and 200 µs off-time). In order to obtain a stable luminescence signal, only off-time IRSL signal was recorded. Performance tests gave solid results. Anomalous fading was intended to be reduced by using the pulsed IRSL signal measured at 50°C (IR 50 ), but fading correction was in most cases necessary due to moderate fading rates. Fading uncorrected and corrected pulsed IR 50 ages revealed two major fluvial aggradation phases during the Late Pleistocene, namely during marine isotope stage (MIS) 5d (100 ± 5 ka) and from late MIS 5b to MIS 4 (77 ± 6 ka to 68 ± 5 ka). The obtained luminescence ages are consistent with previous 230 Th/U dating results from underlying interglacial deposits of the same pit, which are correlated with MIS 7c to early MIS 6.

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Terrace styles and timing of terrace formation in the Weser and Leine valleys, northern Germany: Response of a fluvial system to climate change and glaciation

Cited by 39 publications

References 125 publications

Flow dynamics, sedimentation and erosion of glacial lake outburst floods along the Middle Pleistocene Scandinavian Ice Sheet (northern central Europe)

Flow dynamics, sedimentation and erosion of glacial lake outburst floods along the Middle Pleistocene Scandinavian Ice Sheet (northern central Europe)

Response of a mountain‐foreland fluvial system to an advancing ice sheet, southern Poland

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

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