Surging glacier landsystem of Tungnaarjokull, Iceland

David J. A. Evans, David R. Twigg, Brice R. Rea, Chris Orton

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)134-151
Number of pages18
JournalJournal of Maps
Volume5
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • Bruarjokull
  • geomorphology
  • landform

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