Landslides and relict ice margin landforms in Adventdalen, central Spitsbergen, Svalbard

  • Takanobu Sawagaki
  • Takashi Koaze

Abstract

Two characteristic landforms, landslide blocks and drainage channels, were investigated in Adventdalen, central Spitsbergen. The landslides in the middle reaches of Adventdalen comprise large-scale bedrock slumps which form a hummocky surface on the south slope of Arctowskifjellet. The fourteen recognized landslide blocks are divided into upper and lower sections, according to altitude. The drainage channels consist of tributary rivers to Adventelva which flow in two distinct directions, either parallel with or oblique to the direction of the main river. Glacial deposits were found to cover the ridges between these tributary channels. The upper and lower landslide divisions may indicate former positions of the ice surface, and the channels appear to have originated during the existence of lateral moraine ridges with high ice content. These geomorphological findings have allowed reconstruction of former ice marginal positions, and they strongly suggest the existence of stagnant ice or minor re-advance phases during the course of deglaciation in Adventdalen.

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Published
1996-01-12
How to Cite
Sawagaki, T., & Koaze, T. (1996). Landslides and relict ice margin landforms in Adventdalen, central Spitsbergen, Svalbard. Polar Research, 15(2), 139-152. https://doi.org/10.3402/polar.v15i2.6643
Section
Research/review articles