The geomorphology and style of plateau icefield glaciation in a fjord terrain, Troms-Finnmark, North Norway

D. J. A. Evans, Brice Reid Rea, J. D. Hansom, W. B. Whalley

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

In spite of a widespread distribution, the way in which plateau icefields affect the glaciation and cleglaciation of adjacent terrains is not particularly well-known. This paper aims to identify how the deglaciation of the fjord and plateau terrain of north Norway has influenced the glacial geomorphology and relative sea-level history of both local and adjacent areas and so serve as a model for interpreting similar areas along the continental margins of northwest Europe and elsewhere. The identification of moraines and their relationships with the Main shoreline of northern Norway allows the margins of the Oksfjordjokelen, Svartfjelljokelen and Langfjordjokelen plateau journal of Quaternary Science icefields to be identified in the adjacent terrains. In locations where ice margins are uncertain, it is also possible to reconstruct ice limits by means of glacier models appropriately constrained by known local conditions and dates. Earlier glacier margins, characterised in north Norway by ice shelves floating in the local inlets of major fjords, also can be related to known regional shorelines. The distribution of high shoreline fragments, augmented by radiocarbon dates, helps show the extent to which inter-island channels and outermost parts of fjords can become deglaciated relatively early in comparison with published maps of regional deglaciation. Plateau-icefield-centred glaciation became important sometime after 14000 C-14 yr BP and was characterised by glacier readvances up to, and in some locations beyond, earlier moraines and raised marine features. Although overlooked until recently, the identification of the influence of plateau icefields on local glaciation, and their interaction with local and regional marine limits, is of great importance in accurate palaeoenvironmental reconstruction. Copyright (C) 2002 John Wiley Sons, Ltd.

Original languageEnglish
Pages (from-to)221-239
Number of pages18
JournalJournal of Quaternary Science
Volume17
Issue number3
DOIs
Publication statusPublished - 2002

Keywords

  • plateau icefield
  • deglaciation
  • Troms-Finnmark
  • Norway
  • ice limits
  • sea-level
  • LAST GLACIAL MAXIMUM
  • WITHIN-VALLEY ASYMMETRY
  • ELLESMERE-ISLAND
  • WESTERN NORWAY
  • INNUITIAN ICE
  • YOUNGER DRYAS
  • DEBRIS TRANSPORT
  • ARCTIC CANADA
  • SEA
  • CHRONOLOGY

Cite this

The geomorphology and style of plateau icefield glaciation in a fjord terrain, Troms-Finnmark, North Norway. / Evans, D. J. A.; Rea, Brice Reid; Hansom, J. D.; Whalley, W. B.

In: Journal of Quaternary Science, Vol. 17, No. 3, 2002, p. 221-239.

Research output: Contribution to journalArticle

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AB - In spite of a widespread distribution, the way in which plateau icefields affect the glaciation and cleglaciation of adjacent terrains is not particularly well-known. This paper aims to identify how the deglaciation of the fjord and plateau terrain of north Norway has influenced the glacial geomorphology and relative sea-level history of both local and adjacent areas and so serve as a model for interpreting similar areas along the continental margins of northwest Europe and elsewhere. The identification of moraines and their relationships with the Main shoreline of northern Norway allows the margins of the Oksfjordjokelen, Svartfjelljokelen and Langfjordjokelen plateau journal of Quaternary Science icefields to be identified in the adjacent terrains. In locations where ice margins are uncertain, it is also possible to reconstruct ice limits by means of glacier models appropriately constrained by known local conditions and dates. Earlier glacier margins, characterised in north Norway by ice shelves floating in the local inlets of major fjords, also can be related to known regional shorelines. The distribution of high shoreline fragments, augmented by radiocarbon dates, helps show the extent to which inter-island channels and outermost parts of fjords can become deglaciated relatively early in comparison with published maps of regional deglaciation. Plateau-icefield-centred glaciation became important sometime after 14000 C-14 yr BP and was characterised by glacier readvances up to, and in some locations beyond, earlier moraines and raised marine features. Although overlooked until recently, the identification of the influence of plateau icefields on local glaciation, and their interaction with local and regional marine limits, is of great importance in accurate palaeoenvironmental reconstruction. Copyright (C) 2002 John Wiley Sons, Ltd.

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KW - Troms-Finnmark

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KW - ice limits

KW - sea-level

KW - LAST GLACIAL MAXIMUM

KW - WITHIN-VALLEY ASYMMETRY

KW - ELLESMERE-ISLAND

KW - WESTERN NORWAY

KW - INNUITIAN ICE

KW - YOUNGER DRYAS

KW - DEBRIS TRANSPORT

KW - ARCTIC CANADA

KW - SEA

KW - CHRONOLOGY

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EP - 239

JO - Journal of Quaternary Science

JF - Journal of Quaternary Science

SN - 0267-8179

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ER -