Skip to main content
Article
Geomorphology and Topography of Relict Surfaces: the influence of inherited crustal structure in the northern Scandinavian Mountains
Journal of the Geological Society (2017)
  • Elizabeth R. Schermer
  • Thomas F. Redfield
  • Kjetil Indrevær
  • Steffen G. Bergh
Abstract
Low-relief surfaces in northern Norway are mapped and analysed to explore (1) whether surfaces were once continuous and possibly correlative, recording an ancient, relict landscape, (2) whether the distribution of (now disrupted) surfaces reveals a tectonic history related to rifting of the North Atlantic and (3) how topography changes across the transition between the North Atlantic and Barents Sea margins. Elevation contours on surfaces, a smoothed fit to mean elevations and histograms of elevation show three distinct, coast-parallel zones onshore northern Norway, and a different pattern in coastal Lofoten–Vesterålen. A sharp transition from continuous surfaces to lower, discretely stepped, discontinuous surfaces is located where the crust thins rapidly to the NW from >39 to <25 km. In margin-parallel transects, elevations remain high for >100 km north of the Senja Fracture Zone and then decrease gradually further NE. The spatial pattern suggests that a continuous, low-relief, relatively low-elevation surface formed in late Mesozoic time and was preserved despite modification by Cenozoic faulting, uplift and slow erosion. Scandinavia's present-day topographic envelope reflects a crustal strength profile set up during earlier hyperextension and maintained by slow Neogene erosion rather than resulting from opening of the North Atlantic or caused by glacial erosion.
Keywords
  • Topographic evolution of mountain belts
Disciplines
Publication Date
January, 2017
DOI
10.1144/jgs2016-034
Citation Information
Elizabeth R. Schermer, Thomas F. Redfield, Kjetil Indrevær and Steffen G. Bergh. "Geomorphology and Topography of Relict Surfaces: the influence of inherited crustal structure in the northern Scandinavian Mountains" Journal of the Geological Society Vol. 174 Iss. 1 (2017) p. 93 - 109
Available at: http://works.bepress.com/elizabeth_schermer/13/