Inherited Landforms and Glacial Impact of Different Palaeosurfaces in Southwest Sweden
The glacial reshaping of the sub-Cambrian flat bedrock surfaces is negligible. The glacial impact becomes more evident in the uplifted and dissected parts of the peneplain and within the hilly sub-Mesozoic surface. The higher the initial relief the more effect of glacial erosion on individual hills, both on the abrading side, with formation of roches moutonnées, and on the plucking side. Detailed etchforms are preserved in protected positions in spite of erosion by a clearly wet-based ice. The magnitude of the Pleistocene glacial erosion is considerably less than the amplitude of the palaeorelief in the entire area.
Landscapes of areal glacial scouring have been described as comprising irregular depressions with intervening bosses scraped by ice and labelled ‘knock and lochan’ topography, but we suggest that an etched bedrock surface is a prerequisite for this type of landscape to develop.
Document Type: Research Article
Affiliations: 1: Department of Earth Science and Geography, Karlstad University, SE-651 88 Karlstad, Sweden 2: Department of Physical Geography, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden 3: Department of Physical Geography, Stockholm University, SE-106 91 Stockholm, Sweden
Publication date: 01 January 2001