Tributaries of the Elbe Palaeovalley: Features of a Hidden Palaeolandscape in the German Bight, North Sea

Hepp, Daniel A.; Warnke, Ursula; Hebbeln, Dierk; Mörz, Tobias

doi:10.1007/978-3-319-53160-1_14

Cited by 13 publications

(56 citation statements)

References 7 publications

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“…The additional cores 09‐x were first presented by Hepp et al (). They show a similar lithologic stratigraphy to GeoB17721‐1 (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…). The 09‐x cores show a lithological valley infill succession (Hepp et al , ) comparable to GeoB17721‐1 (Fig. (a)): pre‐river sands – basal peat formation – transgressional clays and silts with intercalated peats – sands with shell layers (possibly tempestites).…”

Section: Discussionmentioning

confidence: 99%

“…(b)). Cores 09‐5 and 09‐7 exhibit intercalated peat sequences, which might be explained by common regional dislocations of the river bed in a meandering river setting (Hepp et al , ).…”

Section: Discussionmentioning

confidence: 99%

“…The Entenschnabel river system drained the Dogger Bank to the southeast. The system was influenced by postglacial sea level rise and developed from a single deep valley, which may initially have originated during the last glacial, to a network of shallower rivers and tributaries (Hepp et al , ). The morphology of this network is similar to river structures known from the western part of the Dogger Bank (Fitch et al , ; Phillips et al , ).…”

Section: Introductionmentioning

confidence: 99%

“…Location of cores used in the study area (Modified from Hepp et al , ): (a) assured river course of the drowned late Weichselian/early Holocene Paleo‐Ems valley and the modern Ems River (solid red lines) in relation to the Elbe Paleovalley (dotted black line). The hypothetical course (dashed red line) crosses today's barrier island Juist, which only was formed after the submergence of the Paleo‐Ems; (b) seismic visualization of the sediment thickness above the paleosurface and the valley base.…”

Section: Introductionmentioning

confidence: 99%

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How a river submerges into the sea: a geological record of changing a fluvial to a marine paleoenvironment during early Holocene sea level rise

Hepp

Romero

Mörz

et al. 2019

J Quaternary Science

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Coastal seas, and in particular estuarine systems, were significantly affected by Quaternary sea level changes. Furthermore, the dynamics of shelf and coastal evolution have had a strong impact on coastal landscapes inhabited by humans. The postglacial evolution of the vast North Sea shelf with its huge drainage systems, e.g. the Elbe Paleovalley and its tributary system, is an excellent research target to understand how coastal shelf environments change in response to sea level rise. In this study, we investigate infill sediments of the Paleo‐Ems valley – a drowned extension of the modern Ems River and part of the Elbe Paleovalley drainage system. Radiocarbon‐dated transgression sequences provide several new observations regarding the mode and rate of the river system submerging due to the Holocene transgression. Thus, the Paleo‐Ems valley submerged within a short time span of~200 years since the river was not able to adjust its gradient to the rapid rising sea level. The fate of the Paleo‐Ems is exemplary for the rapid change of a former fluvial landscape into a coastal landscape and finally into a submarine seascape. © 2019 The Authors. Journal of Quaternary Science Published by John Wiley & Sons Ltd.

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“…The additional cores 09‐x were first presented by Hepp et al (). They show a similar lithologic stratigraphy to GeoB17721‐1 (Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…(b)). Cores 09‐5 and 09‐7 exhibit intercalated peat sequences, which might be explained by common regional dislocations of the river bed in a meandering river setting (Hepp et al , ).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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How a river submerges into the sea: a geological record of changing a fluvial to a marine paleoenvironment during early Holocene sea level rise

Hepp

Romero

Mörz

et al. 2019

J Quaternary Science

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Vertical acoustic blanking in seismic data from the German North Sea: a spotlight to shallow gas‐bearing incised channels

Ahlrichs,

Ehrhardt,

Schnabel

et al. 2024

J Quaternary Science

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Seismic data from the North Sea commonly show vertical acoustic blanking (VAB) often interpreted as fluid conduits with implications for Quaternary development. The robustness of this interpretation has long been controversial as the infill of tunnel valleys can also cause vertical blanking. Using 2D and 3D seismic data and sediment echosounder data from the German North Sea, we investigate VAB to determine a geological or imaging origin of these anomalies. We detected multiple VAB occurrences throughout the North Sea. 3D data from the Ducks Beak (‘Entenschnabel’) reveal a correlation of VAB with bright spots in incised channels directly below the seafloor. Large source–receiver distances allow imaging the subsurface below the channel without signal penetrating through it (undershooting). This method removes the blanking. Energy absorption by shallow biogenic gas trapped within the channels explains the observed VAB. Hence, the blanking represents an imaging artifact, highlighting the need for careful seismic processing with sufficient offset before interpreting such anomalies as fluid pathways. The channels belong to a postglacial channel system related to the now submerged lowlands of Doggerland. This work demonstrates the usability of mapping VAB to detect shallow features for paleo‐landscape reconstruction and identification of shallow gas for hazard assessments, for example.

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The Baltic and Scandinavia: Introduction

Bailey

Jöns

2020

Coastal Research Library

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This section deals with some of the largest concentrations of underwater sites in Europe. Because of the complex history of isostatic rebound and periodic damming back of the Baltic Sea associated with the retreat of the Scandinavian ice sheet, these chapters also present a wide range of preservation conditions and palaeoenvironmental changes, ranging from shorelines that have been lifted clear of sea-level rise in Norway and parts of Sweden but without organic preservation, to sinking shorelines on the Baltic coastlines of Denmark and Germany with little overburden of marine sediments and spectacular organic preservation, to open-coast conditions along the North Sea shorelines of Denmark and Germany where sites are mostly buried under thick marine deposits. Many sites in Denmark and Germany have benefited from systematic excavation, demonstrating that the majority of finds and features have been recovered from

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Tributaries of the Elbe Palaeovalley: Features of a Hidden Palaeolandscape in the German Bight, North Sea

Cited by 13 publications

References 7 publications

How a river submerges into the sea: a geological record of changing a fluvial to a marine paleoenvironment during early Holocene sea level rise

How a river submerges into the sea: a geological record of changing a fluvial to a marine paleoenvironment during early Holocene sea level rise

Vertical acoustic blanking in seismic data from the German North Sea: a spotlight to shallow gas‐bearing incised channels

The Baltic and Scandinavia: Introduction

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