Sea cliff at Kieler Ufer (Pleistocene stripes 11&amp;amp;#8211;16) &amp;amp;#8211; large-scale architecture and kinematics of the Jasmund Glacitectonic Complex

Gehrmann, Anna; Meschede, Martin; Hüneke, Heiko; Pedersen, Stig Andur

doi:10.5194/deuquasp-2-19-2019

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…2013; Pedersen 2014; Livingstone & Clark 2016; Gehrmann et al . 2019) whereas offshore analyses rely on seismic data. High‐resolution 3D seismic data would allow a detailed structural analysis of offshore GTCs, but data of sufficient resolution are rarely available (Rafaelsen et al .…”

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confidence: 99%

The Heligoland Glacitectonic Complex in the southeastern North Sea: indicators of a pre‐ or early‐Elsterian ice margin

Lohrberg

Krastel

Unverricht

et al. 2021

Boreas

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Glacial landforms are abundant in the North Sea basin and are often used to reconstruct the impact and dynamics of ice sheets during the Pleistocene. Geophysical methods have allowed the mapping and structural analysis of glacial landforms at the surface and in the subsurface to estimate the position of former ice margins in the North Sea. However, the glacial history of the southeastern North Sea remains underexplored. In this study, we present a structural analysis of Late Pliocene to Late Pleistocene sediments based on a dense grid of 2D high‐resolution multi‐channel reflection seismic data from the German sector of the southeastern North Sea. We show that the Heligoland Glacitectonic Complex (HGC) is larger than previously assumed (700 km2, 32×22 km) and characterized by three distinct zones of thrusting and deformation on two décollements. The kinematic restoration of seismic cross‐sections and dip measurements of thrust faults demonstrate that the HGC was formed by an ice lobe advancing from the southeast. To explain the origin of the HGC, we provide alternative models for its formation during a single ice advance or two ice advances in the study area. Furthermore, we validate the early or pre‐Elsterian age of the HGC based on nearby Elsterian tunnel valleys, and conclude that salt structures in the subsurface may have influenced its location.

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confidence: 99%

The Heligoland Glacitectonic Complex in the southeastern North Sea: indicators of a pre‐ or early‐Elsterian ice margin

Lohrberg

Krastel

Unverricht

et al. 2021

Boreas

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“…The glacitectonic configuration of Jasmund represents a fold-and-thrust belt similar to the Danish glacitectonic complexes Møns Klint and Rubjerg Knude (Pedersen 2000(Pedersen , 2005Gehrmann et al 2019). Upper Cretaceous (Maastrichtian) chalk layers as well as unconsolidated Pleistocene glacial deposits are deformed resulting in a number of folds and associated thrusts (Credner 1893;Gripp 1947;von Bülow 1955;Groth 2003;Ludwig 2011).…”

Section: Geological Settingmentioning

confidence: 98%

New insights into the structural development and shortening of the southern Jasmund Glacitectonic Complex (Rügen, Germany) based on balanced cross sections

Gehrmann

Pedersen

Meschede

2022

Int J Earth Sci (Geol Rundsch)

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Late Pleistocene glacitectonism at the southern Scandinavian Ice Sheet margin caused folding and thrusting of Upper Cretaceous chalk layers and Pleistocene glacial deposits in parts of the southwestern Baltic Sea area in Europe. Beside Møns Klint (SE Denmark), the Jasmund Glacitectonic Complex (JGC) on Rügen Island (NE Germany) is a similar striking example of glacitectonic deformation creating large composite ridges. In spite of a long research history and new results from modern datasets, the structural development of the JGC is still poorly understood, especially the detailed evolution of the southern JGC and its relationship to the northern JGC remain enigmatic. In this contribution, we demonstrate how the understanding of the JGC benefits from the application of established structural geological methods comprehending the formation of fold-and-thrust belts. The methods include cross-section balancing of the eastern coast (southern JGC) and quantification of the amount of folding and faulting. The proposed geometric model shows the current fold-and-thrust stack of glacially deformed sedimentary strata ca. 5720 m in length evolved by shortening from the original length (11,230 m) by 5510 m (49.1%). We present a spatial and temporal development of fault-related folding with a transition from detachment folds through fault-propagation folds to fault-bend folds. Together with morphological information from a digital elevation model, the thrust faults mapped in the cliff section are mainly inclined towards the S to SW and imply that a local glacier push occurred from the south. These results highlight the complexity and individual architecture of the JGC when compared to other Pleistocene and modern glacitectonic complexes. Resolving its structural development provides new insight into the deformation history and shortening of this spectacular glacitectonic complex lying in the southwestern Baltic Sea region.

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“…The lithostratigraphy adopted here, as outlined by Nirex (1997l) and Merritt & Auton (2000) and incorporated into a larger scheme proposed by McMillan, et al, (2011), is fundamentally a hybrid of litho-and allostratigraphy (McMillan & Merritt, 2012). Glaciotectonic architectural analysis is based on the identification of packages of glaciotectonicallygenerated or deformed sediment bounded by structural features such as décollement surfaces (Pedersen & Gravesen, 2009;Pedersen, 2014;Pedersen & Boldreel, 2015;Lee, et al, 2017;Gehrmann, et al, 2019). It recognises that certain deformation styles comprising combinations of structural types are associated with specific depositional environments (McCarroll & Rijsdijk, 2003), providing additional constraints on the correlation between subsurface datapoints in 3D geological modelling.…”

Section: A C C E P T Ementioning

confidence: 99%

High-resolution 3D geological modelling of heterogeneity in poorly exposed glacial deposits using sedimentary and glaciotectonic architectural element analysis: a case example from Sellafield in west Cumbria, UK

Smith

Merritt

Phillips

2022

QJEGH

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Sea cliff at Kieler Ufer (Pleistocene stripes 11&#8211;16) &#8211; large-scale architecture and kinematics of the Jasmund Glacitectonic Complex

Cited by 8 publications

References 17 publications

The Heligoland Glacitectonic Complex in the southeastern North Sea: indicators of a pre‐ or early‐Elsterian ice margin

The Heligoland Glacitectonic Complex in the southeastern North Sea: indicators of a pre‐ or early‐Elsterian ice margin

New insights into the structural development and shortening of the southern Jasmund Glacitectonic Complex (Rügen, Germany) based on balanced cross sections

High-resolution 3D geological modelling of heterogeneity in poorly exposed glacial deposits using sedimentary and glaciotectonic architectural element analysis: a case example from Sellafield in west Cumbria, UK

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