Abstract
Cross sections of glaciotectonic complexes are exposed in coastal cliffs
in Denmark, which allow structural studies of the architecture of
thin-skinned thrust-fault deformation (Pedersen 2014). However, the
basal part of the thrust-fault complex is never exposed, because it is
located 50 to 100 m below sea level. It is in the basal part the most
important structure – the décollement zone – of the complex is found.
The décollement zone constitutes the more or less horizontal surface
that separates undeformed bedrock from the displaced thrust-sheet units
along the décollement level. One of the most famous exposures of
glaciotectonic deformations in Denmark is the Møns Klint Glaciotectonic
Complex. The structures above sea level are well documented, whereas the
structures below sea level down to the décollement level are poorly
known. Modelling of deep structures was carried out by Pedersen (2000)
but still needs documentation. A glaciotectonic complex affecting
comparable rock units, such as the chalk at Møns Klint, was recently
recognised in seismic sections from Jammerbugten in the North Sea (Fig.
1). These sections provide an excellent opportunity for comparable
studies of the upper and lower structural levels in thin-skinned
thrust-fault deformation, which is discussed in this paper with examples
from three major glaciotectonic complexes.
Original language | English |
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Pages (from-to) | 17-20 |
Number of pages | 4 |
Journal | Geological Survey of Denmark and Greenland Bulletin |
Volume | 33 |
DOIs | |
Publication status | Published - 7 Jul 2015 |
Programme Area
- Programme Area 5: Nature and Climate