Surging glacier landsystem of Tungnaárjökull, Iceland.

• Published in: Journal of Maps
• Main Authors: Evans, D. J. A., Twigg, D. R., Rea, B. R., Orton, C.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Journal of maps 2009
• Subjects: Tungnaárjökull; glacier; Iceland
• Online Access: http://dro.dur.ac.uk/6873/; http://dro.dur.ac.uk/6873/1/6873.pdf; http://dro.dur.ac.uk/6873/2/6873Map.pdf; https://doi.org/10.4113/jom.2009.1064

A 1:30,000 scale map of the snout and proglacial landscape of the surging Icelandic glacier Tungnaarjokull, based upon aerial photography from 1995, immediately after a surge, allows an assessment of the spatial variability in landform-sediment imprints of catastrophic glacier advance across upland bedrock ridges. The ice-margin parallel alignment of the bedrock ridges locally strongly directs proglacial meltwater drainage and initiates strong compression in the ice during surging, resulting in the development of prominent ice-cored hummocky moraine composed of glacifluvial sediment. Diagnostic surge landforms elsewhere on the foreland include thrust block and push moraines, overridden ice-cored thrust block moraines, crevasse squeeze ridges, long flutings, hummocky moraine and ice-cored, pitted outwash.