Ice-marginal characteristics of Fridtjovbreen (Svalbard) during its recent surge

Article English OPEN
Glasser, Neil F. ; Huddart, David ; Bennett, Matthew R. (1998)

Fridtjovbreen is an actively surging tidewater glacier in western Spitsbergen, Svalbard. This paper presents observations made at the western flank of the glacier in July 1997, when the glacier front was still advancing rapidly and was characterised by steep lateral ice cliffs. The geomorphological consequences of the surge include the formation of push moraines from toppled ice blocks along this ice cliff and the development of debris-rich thrusts. There is also evidence of glaciotectonic deformation within deformed debris-rich thrusts. Thrusts are restricted to the lateral margins and are not seen in the terminal calving cliff. On its western flank, Fridtjovbreen is over-riding Sagabreen, a small-tributary glacier. Large facies variations in this area are a result of recycling by Fridtjovbreen of material originally transported as medial moraines on Sagabreen. There are few observations of landform development at actively surging glaciers in Svalbard. The Fridtjovbreen descriptions provide documentation for post-surge landform development. More observations are required at the margins of actively surging glaciers to determine how representative Fridtjovbreen is of a surge event.
  • References (30)
    30 references, page 1 of 3

    Bennett, M. R. & Doyle, P. 1994: Carmthers and the theory of glacial undermelt: lessons from a pamphleteer? Geol. Today 10, 191-193.

    Bennett. M. R., Hambrey, M. J., Huddart, D. & Ghienue, J. F. 1996a: The formation of a geometrical ridge network by the surge-type glacier Kongsvegen. Svalbard. J. &at. Sci. 11(6), 4 3 7 4 9 .

    Bennett. M. R.. Huddart. D., Hambrey, M. J. & Ghienne, J. F. 1996b: Moraine development at the high-arctic valley glacier Pedersenbreen, Svalbard. Geogr. Ann. 78A(3),209-222.

    Bjomsson. H., Gjessing, Y., Hamran, S.-E., Hagen, J. O., Liestbl, O., Pilsson. F. & Erlingsson, B. 1996: The thermal regime of sub-polar glaciers mapped by multi-frequency radio-echo sounding. J. Glaciol. 42(11O), 23-32.

    Boulton, G. S., Van der Meer, J. J. M., Hart, J., Beets, D.. Ruegg, G. H. J., Van der Wateren, F. M. & Jarvis, J. 1996: Till and moraine emplacement in a defxming bed surge - an example from a marine environment. Qitnt. Sci. Rev. 15, 961-987.

    Carruthers, R. G. 1953: Glacial drifs and the undermelt theory. Harold Hill & Sons Ltd, Newcastle upon Tyne. 38 pp.

    Clarke. G. K. C., Collins, S. G. & Thompson, D. E. 1984: Flow, thermal structure, and subglacial conditions of a surge-type glacier. Con. J. Earth. Sci. 21(2), 232-240.

    Dolgushm, L. D. & Osipava. G. B. 1973: The regime of a surging glacier. IAHS 107, 1150-1 159.

    Dowdeswell, J. A., Hamilton, G. S. & Hagen, J. 0. 1991: The duration of the active phase of surge-type glaciers: contrasts between Svalbard and other regions. J. Glaciol. 37, 3 8 8 4 0 0 .

    Etzelniiiller, B . & Sollid, J. L. 1996: Long-term mass balance of selected polytheimal glaciers on Spitsbergen, Svalbard. North Geogr. Tidsskr. 5 0 , 55-66.

  • Metrics
    No metrics available
Share - Bookmark